Anomalously High Porosity & Permeability S. Bloch
|
|
- Merilyn Foster
- 5 years ago
- Views:
Transcription
1 Anomalously High Porosity & Permeability S. Bloch Graphics: P.M. Kay
2 2001 The American Association of Petroleum Geologists and Salmon Bloch No slides, figures, text or other matter contained herein may be reproduced without the written permission of both the American Association of Petroleum Geologists and Salmon Bloch
3 Anomalously High p&p Quantitative Definition Origin and Predictability Grain Coats & Grain Rims Chlorite Coats Quartz Coats Clay Rims Early Hydrocarbon Emplacement Early Overpressure Secondary Porosity
4 Conclusions anomalous porosity - statistically higher than porosity values occurring in typical sandstone reservoirs of a given lithology, age, and burial / temperature history evaluation of anomalous p&p preserved by chlorite coats is a two-step process: evaluation of the likelihood of occurrence of chlorite coats as a function of sediment provenance and depositional facies diagenetic modeling to determine the constraints required to preserve economically viable p&p
5 Conclusions Impact of hydrocarbon emplacement on p&p can be quantified, prior to drilling, by integration of basin modeling and reservoir quality modeling p&p preservation due to fluid overpressure can be quantified, prior to drilling, by integration of basin modeling and reservoir quality modeling
6 Secondary porosity Unquestionable ubiquity Conclusions Importance overemphasized Effect on reservoir quality prediction Extent of preservation controlled by the same geological parameters as primary p&p Implicitly accounted for by calibration data sets used in empirical predictions Limited impact on reservoir scale - redistributional, not effective
7 Anomalously High p&p Quantitative Definition Origin and Predictability Grain Coats & Grain Rims Chlorite Coats Quartz Coats Clay Rims Early Hydrocarbon Emplacement Early Overpressure Secondary Porosity
8 Number of Measurements Normal Distribution of Porosity in a Sandstone with a Moderate Diagenetic Imprint mean, median mode Tertiary, offshore West Africa maximum Core Plug Porosity (%)
9 Lognormal Distribution of Porosity in Heavily Cemented Sandstones Number of Measurements Ror Formation; 15,420-15,750 ft. maximum porosity 0 [0,2) [4,6) [8,10) [12,14) [16,18) Core Plug Porosity (%)
10 Bimodal Distribution of Porosity in Chlorite- Coated Sandstones Ile Formation; 15,100-15,420 ft. Number of Measurements φ < 15%; n = 263 mean = 8.9 median = 8.9 mode = 9.0 maximum φ φ > 15%; n = 81 mean = 20.1 median = 20.4 mode = 20.0 anomalously high φ 0 [0,2) [4,6) [8,10) [12,14) [16,18) Core Plug Porosity (%) [20,22) [24,26)
11 Frequency Distribution of Porosity in U. Jurassic Sandstones, Central Graben (Ula & Gyda Fields), North Sea Frequency (%) Well A bimodal porosity distribution Well B Well C bimodal porosity distribution microquartz coats present no microquartz coats present Porosity (%) from Aase et al., 1996
12 Anomalously High p&p Quantitative Definition Origin and Predictability Grain Coats & Grain Rims Chlorite Coats Quartz Coats Clay Rims Early Hydrocarbon Emplacement Early Overpressure Secondary Porosity
13
14
15 Origin of Chlorite Coats depositionally-controlled Fe-rich coats in high-energy, shallow-marine sandstones shelf (Ehrenberg, 1993) depositionally-controlled coats in turbidites (Houseknecht & Ross, 1991) down-slope transport of coated shallow-marine sands (Sullivan et al., 1999) provenance-controlled (VRFs) coats (Thomson, 1979; Pittman et al., 1992) Mg-rich coats formed by interaction of precursor clay/iron oxide grain rims with Mg-rich saline brines (Kugler & McHugh, 1990)
16 Effect of Grain Coating & Burial History on Porosity Preservation - Diagenetic Models Miocene, Gulf of Mexico Jurassic, Norwegian Shelf Temperature (ºC) Time (Ma) (Bloch et al., 2002)
17 Effect of Grain Coating & Burial History on Porosity Preservation - Diagenetic Models Percent Miocene, Gulf of Mexico 15% coat to preserve 15% porosity Jurassic, Norwegian Shelf 82% coat to preserve 15% porosity Grain Size = 0.40mm Grain Coat Coverage (%) Quartz Cement Intergranular Porosity (Bloch et al., 2002)
18 Prediction of p&p Preservation by Chlorite Coats the effect of coats on p&p cannot be accurately quantified prior to drilling the distribution pattern of coated sands is a function of coat origin the potential impact of coats on p&p can be evaluated by diagenetic models
19 Anomalously High p&p Quantitative Definition Origin and Predictability Grain Coats & Grain Rims Chlorite Coats Quartz Coats Clay Rims Early Hydrocarbon Emplacement Early Overpressure Secondary Porosity
20 Frequency Distribution of Porosity in U. Jurassic Sandstones, Central Graben (Ula & Gyda Fields), North Sea Frequency (%) Well A bimodal porosity distribution Well B Well C bimodal porosity distribution microquartz coats present no microquartz coats present Porosity (%) from Aase et al., 1996
21 Microquartz Coats Conclusions Geological Prediction of Anomalous p&p due to Microquartz Coats in Not Possible in Frontier Basins Distribution of sponge spicule-sourced coats - mapping sponge spicule-prone sedimentary facies and their reworking paths into sand-rich depo systems Distribution of coats sourced by dissolution of volcanic glass - occurrence within specific isochronous sandy intervals of the sedimentary column from Aase et al., 1996
22 Anomalously High p&p Quantitative Definition Origin and Predictability Grain Coats & Grain Rims Chlorite Coats Quartz Coats Clay Rims Early Hydrocarbon Emplacement Early Overpressure Secondary Porosity
23 Pitfalls: Effect of HC Emplacement on Preservation of p&p effect of wettability on cementation differences in texture, composition, and thermal exposure in samples from water legs versus hydrocarbon legs poor control on hydrocarbon filling and leakage histories
24 Effect of HC Emplacement on Preservation of p&p silica provided externally by advection ( open system ) - cementation stopped silica supplied internally ( closed system ) in water-wet reservoirs - cementation retarded, but not stopped silica supplied internally ( closed system ) in oil-wet reservoirs - cementation stopped From Worden et al. (1998)
25 Mid-Tertiary Hydrocarbon Emplacement Preserved 9% of Effective Porosity Depth (m) effective porosity evolution curve burial history curve 120 NW Shelf of Australia quartz cement Time (Ma) 40 HC measured effective porosity measured qtz cement Quartz Cement / Effective Porosity (%)
26 Anomalously High p&p Quantitative Definition Origin and Predictability Grain Coats & Grain Rims Chlorite Coats Quartz Coats Clay Rims Early Hydrocarbon Emplacement Early Overpressure Secondary Porosity
27 Effect of Overpressure on Porosity Preservation: Model Assumptions Compaction and quartz cementation are the primary controls on reservoir quality Linear burial to 4000 m at 30 ºC/km Present-day overpressure near fracture gradient Shallow scenario: develops m Deep scenario: develops m Sandstones are medium grained, well sorted, and clean Composition of sandstones: Quartzose : Q 84 F 8 L 8 Lithic : Q 50 F 0 L 50 (L = shale clasts)
28 Quartz Cement Abundance Vs. Effective Stress at km, North Sea HPHT Clastic Reservoirs Slightly Overpressured Effective Stress (psi) Highly Overpressured % Quartz Cement (Ave) from Osborne & Swarbrick, 1999
29 Anomalously High p&p Quantitative Definition Origin and Predictability Grain Coats & Grain Rims Chlorite Coats Quartz Coats Clay Rims Early Hydrocarbon Emplacement Early Overpressure Secondary Porosity
30 Is the change in porosity gradient due to secondary porosity or provenance/facies-controlled change in lithology? M meters M feet depth mainly primary porosity Sonic Porosities of Sandstone Intervals > 10 ft Gulf-Mobil SIKU C-55 (Mackenzie Delta) secondary porosity quartz arenites sandstones of intermediate mineralological maturity decline of primary porosity decline of secondary porosity Percent Porosity IM- MATURE SEMI- MATURE MATURE A MATURE B T E R T I A R Y U.CR LOWER CRETACEOUS from Schmidt & McDonald, 1978
31 Plagioclase Dissolution Porosity
32 Conclusions much of the plagioclase dissolution porosity (PDP) at depths >5000 ft may be inherited shallow PDP if deep PDP is mostly inherited, there may be no aluminum problem the presence of PDP does not have a major impact on the accuracy of empirical predrill predictions of porosity in sandstones
33 The Dataset 216 Middle Eocene - Lower Miocene arkosic sandstone samples from 16 wells in southern San Joaquin basin (Metralla, San Emigdio, Vedder, and Jewett) depth range: 2480 ft - 14,710 ft similar composition secondary porosity formed predominately by dissolution of plagioclase 300 counts per thin-section 1000 counts on subset of 39 thin-sections
34 Reliability of Point-Count Data subjectivity of point-counting secondary porosity (primary vs. secondary, intragranular vs. moldic) errors implicit in point counting (accuracy is a function of true abundance of pores and the number of point counts)
35 QFL Diagram of Feldspathic Sandstones, Southern San Joaquin Basin, California Q subarkose 90% 90% sublitharenite F arkose lithic arkose feldspathic litharenite litharenite L
36 100 Intragranular φ > 50% of PDP in only 8% of samples Intragranular φ > 50% of PDP in 91% of samples Cumulative % shallow (< 5000 ft) deep (> 5000 ft) 20 0 < 10 < 30 < 50 < 70 < 90 < 10 < 30 < 50 < 70 < 90 Plagioclase Intragranular Porosity / Total PDP (Bloch & Franks, 1994)
37 Conclusions Moldic porosity dominates PDP in shallow sandstones (<5000 ft) Intergranular porosity dominates PDP in deeper sandstones (>5000 ft)
38 Proposed Mechanism for PDP Formation < 5000 feet mostly moldic PDP generated - precipitation of some kaolinite - AI is mobilized beyond thin-section scale > 5000 feet mostly intragranular PDP generated - shielding of some shallow moldic PDP by rigid grain framework + cement - collapse of some shallow moldic PDP - precipitation of authigenic clays; redistributional secondary porosity
39 Generation of PDP in the Subsurface - Approximate Balance Calculations Burial Average Primary Porosity (% v/v) Relative Loss (%) Average Plagioclase Intragranular Secondary Porosity Balance Average Plagioclase Intragranular Secondary Porosity Balance Shallow (< 5,000 ft) Deep (> 5,000 ft) % loss gives 0.8%; no gain in moldic porosity % loss gives 0.4%; gain of 1.1% (maximum) (Bloch & Franks, 1994)
40 Evolution of Plagioclase Dissolution Porosity Surface and shallow subsurface dissolution Major dissolution Net porosity gain likely Meteoric water Depth (T, P) Gradual collapse of primary and moldic porosity Deep dissolution Minor dissolution Redistributional secondary porosity Silicate hydrolysis (?), organic acids (?)
41 N Fan Delta Model, Cross-Section Proximal Fan Delta Mid Fan Delta Distal Fan Delta Delta Front Pro- Delta S Sea Level depth (ft) Conglomerate Sandstone Mudstone - Siltstone from McGowen & Bloch, 1985
42 Depositional Facies Control of Porosity and Permeability, Prudhoe Bay Field FACIES MID FAN DELTA LOWER MID FAN DELTA UPPER DISTAL FAN DELTA DISTAL FAN DELTA DELTA FRONT WELL 17-1 k (md) φ (%) COMMENTS No Conglomerate - 16 Conglomerate Samples k = 359md - 19 Sandstone Samples k = 640md No Conglomerate - 13 Samples Coarser than Fine k = 33md - 30 Samples Fine and Less k = 7md PRODELTA NR NR
43 Depositional Facies Control of Porosity and Permeability, Prudhoe Bay Field FACIES WELL 17-1 k (md) φ (%) COMMENTS MID FAN DELTA LOWER MID FAN DELTA No Conglomerate - 16 Conglomerate Samples k = 359md - 19 Sandstone Samples k = 640md UPPER DISTAL FAN DELTA No Conglomerate DISTAL FAN DELTA DELTA FRONT Samples Coarser than Fine k = 33md - 30 Samples Fine and Less k = 7md PRODELTA NR NR
44 Generalized Burial History of Ivishak Sandstone, Prudhoe Bay Area Depth of Burial x 1000 Feet Triassic Jurassic Cretaceous Tertiary shallow burial subaerial exposure final burial Time, Millions of Years B.P. (from Shanmugam & Higgins, 1988)
45 Generation of Secondary Porosity during Subaerial Exposure SHUBLIK SADLEROCHIT
46 Unconformities and Secondary Porosity Ivishak ss - Prudhoe Bay (N. Slope of Alaska) favorable reservoir quality of zone 4 of the Ivishak sandstone due to secondary porosity formed by meteoric water leaching of chert beneath the Neocomian unconformity macroporosity formed by chert dissolution tends to increase toward the Neocomian unconformity a lateral increase in core porosity (from 15% at about 30 km from the unconformity to 30% near the unconformity) and in permeability (from 50 md at about 30 km from the unconformity to 800 md near the unconformity). This increase occurs within the fluvial facies (zone 4) of nearly uniform grain size and framework composition (chert (from Shanmugam & Higgins, 1988) litharenite)
47 Cross Section is Interpreted to Show Porosity Increase with Increasing Proximity to Unconformity A API #61 0 API #40 API #27 UNCONFORMITY A API API API API API #67 #279 #294 #64 # Average Core Porosity in Zone 4 of Ivishak Formation Meters A UNCONFORMITY UNCONFORMITY A from Shanmugam & Higgins, 1988 SCALE 2000 M A --A Line of of Cross Section Prudhoe Bay Field, Alaska
48 There is a Casual Correlation between Porosity and Proximity to Unconformity Meters A API # API #40 API #27 UNCONFORMITY API #67 Average Core Porosity in Zone 4 of Ivishak Formation API # API # API #294 A API # API API #263 # UNCONFORMITY UNCONFORMITY A 21.8 A Decreasing Grain Size SCALE 2000 M A --A Line of of Cross Section Prudhoe Bay Field, Alaska
49 Average Permeability of the Ivishak Sandstone Correlates Well with Grain Size Permeability (md) r = Proportion of Medium- & Coarser-Grained Sandstones (%) = Well number
50 Depth (m) Modeled Porosity Evolution of the Ivishak Sandstone Porosity Depth (m) Quartz cmt (%) Time (Ma) depth = 9,300 ft; grain size = 0.40mm; mod. well sorted; quartz cement = 6%; modeled TS φ = 20%; est. ambient core φ = 23% In situ φ = 22%; in situ k = 850md Porosity (%) / Quartz Cement (%)
51 Reservoir Quality of the Ivishak Sandstone is Controlled by Texture and Burial History Increasing Burial History Sediment Transport High Proportion of Coarse-Grained Sandstones High Proportion of Fine-Grained Sandstones Miles (Bloch et al., 1991)
Anomalously high porosity and permeability in deeply buried sandstone reservoirs: Origin and predictability
Anomalously high porosity and permeability in deeply buried sandstone reservoirs: Origin and predictability Salman Bloch, Robert H. Lander, and Linda Bonnell ABSTRACT Porosity and permeability generally
More informationAppraising a late-middle-aged Brent Group field
Appraising a late-middle-aged Brent Group field Reservoir learnings after nearly 20 years of Pelican field production Jill Marriott The Pelican Field The Pelican oil field is nearly 20 years old It is
More informationQuartz Cementation in Mudrocks: How Common Is It?
Quartz Cementation in Mudrocks: How Common Is It? Kitty L. Milliken Barnett Shale SE/CL image Woodford Shale SE/CL image Cements are Pore-filling Precipitates Specific definition differs with research
More informationSediment and sedimentary rocks Sediment
Sediment and sedimentary rocks Sediment From sediments to sedimentary rocks (transportation, deposition, preservation and lithification) Types of sedimentary rocks (clastic, chemical and organic) Sedimentary
More informationUnderstanding Earth Fifth Edition
Understanding Earth Fifth Edition Grotzinger Jordan Press Siever Chapter 5: SEDIMENTATION: Rocks Formed by Surface Processes Lecturer: H Mohammadzadeh Assistant professors, Department of Geology, FUM Copyright
More informationImage: G. Parker. Presenters: Henry Chan, Kayla Ireland, Mara Morgenstern, Jessica Palmer, Megan Scott
Image: G. Parker Presenters: Henry Chan, Kayla Ireland, Mara Morgenstern, Jessica Palmer, Megan Scott Is the Ross Formation a suitable analog for sand-rich turbidite plays in passive margin basins? Play:
More informationGeology 252, Historical Geology, California State University, Los Angeles - professor: Dr. Alessandro Grippo
LAB # 1 - CLASTIC ROCKS Background: - Mechanical and Chemical Weathering - Production of Clastic Sediment - Classification of Sediment according to size: Gravel, Sand, Silt, Clay - Erosion, Transportation
More informationLab 7: Sedimentary Structures
Name: Lab 7: Sedimentary Structures Sedimentary rocks account for a negligibly small fraction of Earth s mass, yet they are commonly encountered because the processes that form them are ubiquitous in the
More informationHigh-resolution Sequence Stratigraphy of the Glauconitic Sandstone, Upper Mannville C Pool, Cessford Field: a Record of Evolving Accommodation
Page No. 069-1 High-resolution Sequence Stratigraphy of the Glauconitic Sandstone, Upper Mannville C Pool, Cessford Field: a Record of Evolving Accommodation Thérèse Lynch* and John Hopkins, Department
More informationGeologic influence on variations in oil and gas production from the Cardium Formation, Ferrier Oilfield, west-central Alberta, Canada
Geologic influence on variations in oil and gas production from the Cardium Formation, Ferrier Oilfield, west-central Alberta, Canada Marco Venieri and Per Kent Pedersen Department of Geoscience, University
More informationA Regional Diagenetic and Petrophysical Model for the Montney Formation, Western Canada Sedimentary Basin*
A Regional Diagenetic and Petrophysical Model for the Montney Formation, Western Canada Sedimentary Basin* Noga Vaisblat 1, Nicholas B. Harris 1, Vincent Crombez 2, Tristan Euzen 3, Marta Gasparrini 2,
More informationOptimizing Completions within the Montney Resource Play Mike Seifert, Mark Lenko, Joshua Lee Canadian Discovery Ltd.
URTeC: 2139640 Optimizing Completions within the Montney Resource Play Mike Seifert, Mark Lenko, Joshua Lee Canadian Discovery Ltd. Introduction The Montney resource play covers 57,000 square miles from
More informationBALOCHISTAN FOLDBELT BASIN
INTRODUCTION BALOCHISTAN FOLDBELT BASIN The Kharan-3 block is located in the Kharan Trough of Balochistan Basin. GEOLOGICAL SETTING The Balochistan Province is an Upper Cretaceous to Recent structurally
More informationDakota Sandstone. of the Moxa Arch and Surrounding Green River Basin
Dakota Sandstone of the Moxa Arch and Surrounding Green River Basin Dakota Sandstones of the Green River Basin Overview The Dakota sandstones of the Moxa Arch and surrounding Green River Basin remain attractive
More informationSediment. Weathering: mechanical and chemical decomposition and disintegration of rock and minerals at the surface
Sediment Some basic terminology Weathering: mechanical and chemical decomposition and disintegration of rock and minerals at the surface Erosion: removal of weathered rock and minerals from one place to
More informationLecture Outline Wednesday - Friday February 14-16, 2018
Lecture Outline Wednesday - Friday February 14-16, 2018 Quiz 2 scheduled for Friday Feb 23 (Interlude B, Chapters 6,7) Questions? Chapter 6 Pages of the Past: Sedimentary Rocks Key Points for today Be
More informationEPS 50 Lab 4: Sedimentary Rocks
Name: EPS 50 Lab 4: Sedimentary Rocks Grotzinger and Jordan, Chapter 5 Introduction In this lab we will classify sedimentary rocks and investigate the relationship between environmental conditions and
More informationChapter 6 Pages of Earth s Past: Sedimentary Rocks
Chapter 6 Pages of Earth s Past: Sedimentary Rocks Introduction! Drilling into the bottom of the North Sea, we encounter: " Soft mud and loose sand, silt, pebbles, and shells. Then: " Similar materials
More informationOverpressure detection using shear-wave velocity data: a case study from the Kimmeridge Clay Formation, UK Central North Sea
Overpressure detection using shear-wave velocity data: a case study from the Kimmeridge Clay Formation, UK Central North Sea A. Edwards, S. O Connor, S. Green, and K. Waters, Ikon Science UK Overview Introduction
More information2003 GCSSEPM Foundation Ed Picou Fellowship Grant for Graduate Studies in the Earth Sciences Recipient
2003 GCSSEPM Foundation Ed Picou Fellowship Grant for Graduate Studies in the Earth Sciences Recipient Tarek A. El Shayeb University of Texas at Austin Integrated reservoir characterization and 3-D diagenetic
More informationSedimentary Environments Chapter 8
Sedimentary Environments Chapter 8 Does not contain complete lecture notes. To be used to help organize lecture notes and home/test studies. What is a sedimentary rock? Sedimentary rocks are products of
More informationSediment and Sedimentary rock
Sediment and Sedimentary rock Sediment: An accumulation of loose mineral grains, such as boulders, pebbles, sand, silt or mud, which are not cemented together. Mechanical and chemical weathering produces
More informationPlumbing the Depths of the Pelican Field
Plumbing the Depths of the Pelican Field Thurza Frenz Pelican Talk Objectives To discuss the development of the northern area of the Pelican Field, in particular: The relationship between reservoir quality,
More informationSedimentary Rocks. Origin, Properties and Identification. Geology Laboratory GEOL 101 Lab Ray Rector - Instructor
Sedimentary Rocks Origin, Properties and Identification Geology Laboratory GEOL 101 Lab Ray Rector - Instructor Sedimentary Rock Origin and Identification Lab Pre-Lab Internet Link Resources 1) http://www.rockhounds.com/rockshop/rockkey/index.html
More information1/31/2013. Weathering Includes Physical, Chemical, Biological processes. Weathering Mechanisms. Wind abrasion forming Ventifacts
Monument Valley, Utah. What weathering processes contributed to the development of these remarkable rock formations? Weathering Includes Physical, Chemical, Biological processes Weathering Mechanisms Physical
More informationIgneous and Metamorphic Rock Forming Minerals. Department of Geology Mr. Victor Tibane SGM 210_2013
Igneous and Metamorphic Rock Forming Minerals Department of Geology Mr. Victor Tibane 1 SGM 210_2013 Classification of sedimentary rocks Sedimentary rocks are products of weathered, fragmented or dissolved,
More informationDepositional Model and Distribution of Marginal Marine Sands in the Chase Group, Hugoton Gas Field, Southwest Kansas and Oklahoma Panhandle
Depositional Model and Distribution of Marginal Marine Sands in the Chase Group, Hugoton Gas Field, Southwest Kansas and Oklahoma Panhandle Nathan D. Winters, Martin K. Dubois, and Timothy R. Carr Kansas
More informationRelinquishment Report. for. Licence P1605, Block 220/27
Relinquishment Report for Licence P1605, Block 220/27 November 2013 Licence P.1605 Relinquishment Report August 2012 1 of 11 CONTENT 1 Introduction 2 - Exploration Summary 2.1 Exploration Activity 2.2
More informationSediments and Sedimentary Rocks
Sediments and Sedimentary Rocks (Shaping Earth s Surface, Part 2) Science 330 Summer 2005 What is a sedimentary rock? Products of mechanical and chemical weathering Account for about 5 percent of Earth
More informationRevised reservoir model for the Paleocene mounds of the Utsira High, North Sea, Norway John Wild (1) & Nowell Briedis (2)
Revised reservoir model for the Paleocene mounds of the Utsira High, North Sea, Norway John Wild (1) & Nowell Briedis (2) (1) Mobil North Sea LLC (2) Esso Exploration & Production Norway A/S (ExxonMobil
More informationGLG Chapter 7 Sedimentary Environments & Rocks
GLG 101 - Chapter 7 Sedimentary Environments & Rocks Name Note, Oct 11: I ll be writing this study sheet over the next few days. Each day I will add questions until the entire chapter is done, hopefully
More informationHigh Resolution Field-based Studies of Hydrodynamics Examples from the North Sea
High Resolution Field-based Studies of Hydrodynamics Examples from the North Sea Stephen O Connor 1, Richard Swarbrick 2 and Sam Green 1 1 Ikon GeoPressure, Durham, UK 2 Swarbrick Geopressure Consultancy,
More informationPerspectives from Offshore Argentina & Uruguay
Perspectives from Offshore Argentina & Uruguay A Prospectivity Overview Hannah Kearns October 2018 Introduction Argentina Offshore License Round 1 14 blocks Argentina North, 24 Austral-Malvinas Offshore
More informationPROSPECT EVALUATION OF UNCONVENTIONAL PLAYS IN RUSSIA EPUG 2014
PROSPECT EVALUATION OF UNCONVENTIONAL PLAYS IN RUSSIA EPUG 2014 Main definitions AGENDA Shale/shale play definition - Organic matter content - Thermal maturity Potential for unconventionals development
More informationTim Carr - West Virginia University
Tim Carr - West Virginia University Exploration s Ultimate Goal is to Answer Four Questions: Where to Drill? What to Expect? How Certain? How Profitable? Location & Depth HC Volumes Chance of Success
More informationGeology Stratigraphic Correlations (Lab #4, Winter 2010)
Name: Answers Reg. lab day: Tu W Th Geology 1023 Stratigraphic Correlations (Lab #4, Winter 2010) Introduction Stratigraphic correlation is the process of comparing rocks at one locality with related rocks
More informationSample LD2812 LD2834 LD2845 LD2854 LD Information Bill Barrett 43C-3-792
Datashare 38: ppendixes 1, 2, and 3: Prediction of lithofacies and reservoir quality using well logs, Late Cretaceous Williams ork ormation, Mamm Creek field, Piceance asin, Colorado ysen Ozkan, Stephen
More informationSedimentary Rocks. Weathering. Mechanical & Chemical Weathering. Sediments. Lithification. Deposition. Transport. Erosion.
Lithification Sedimentary Rocks Sediments Deposition Transport Erosion Weathering Weathering The sediments that make up sedimentary rocks are produced by: Mechanical & Chemical Weathering Mechanical Weathering
More informationOverview of Selected Shale Plays in New Mexico*
Overview of Selected Shale Plays in New Mexico* Ron Broadhead 1 Search and Discovery Article #10627 (2014)** Posted August 18, 2014 *Adapted from presentation at RMAG luncheon meeting, Denver, Colorado,
More informationPetroleum geology framework, West Coast offshore region
Petroleum geology framework, West Coast offshore region James W. Haggart* Geological Survey of Canada, Vancouver, BC jhaggart@nrcan.gc.ca James R. Dietrich Geological Survey of Canada, Calgary, AB and
More informationSedimentary Rocks. Origin, Properties and Identification. Physical Geology GEOL 100. Ray Rector - Instructor
Sedimentary Rocks Origin, Properties and Identification Physical Geology GEOL 100 Ray Rector - Instructor Sedimentary Rock Origin and Identification Lab Pre-Lab Internet Link Resources 1) http://www.rockhounds.com/rockshop/rockkey/index.html
More informationEROSION, DEPOSITION AND SEDIMENTARY ROCKS. Reading: Earth Science Tarbuck and Lutgens Chapter 5: pages Chapter 3: pages 52-54, 61-69
EROSION, DEPOSITION AND SEDIMENTARY ROCKS Reading: Earth Science Tarbuck and Lutgens Chapter 5: pages 124-133 Chapter 3: pages 52-54, 61-69 Base Level Resistant bed Resistant bed creates a local base level
More informationFactors Contributing to High Gamma-Ray Levels in Early Miocene Bhuban and Boka Bil Sandstone Reservoirs of Titas-15 Well
Dhaka Univ. J. Sci. 59(2): 209-216, 2011 (July) Facrs Contributing High Gamma-Ray Levels in Early Miocene Bhuban and Boka Bil Sandsne Reservoirs of Titas-15 Well M. Mostafizur Rahman 1, Badrul Imam 1,
More informationTechnology of Production from Shale
Technology of Production from Shale Doug Bentley, European Unconventional, Schlumberger May 29 th, 2012 Johannesburg, South Africa What are Unconventional Reservoirs Shale both Gas & Oil Coal Bed Methane
More informationBikashkali Jana*, Sudhir Mathur, Sudipto Datta
10 th Biennial International Conference & Exposition P 354 Facies characterization of a low permeability Cretaceous clastic reservoir to understand reservoir spatial distribution in the Nagayalanka Field,
More informationDiagenesis and reservoir quality of deeply buried Upper Jurassic sandstones in the Central Graben
Master Thesis, Department of Geosciences Diagenesis and reservoir quality of deeply buried Upper Jurassic sandstones in the Central Graben A mineralogical, petrophysical and petrographical approach Muhammad
More informationThe Influence of Pore Pressure in Assessing Hydrocarbon Prospectivity: A Review
H2-2-10 The Influence of Pore Pressure in Assessing Hydrocarbon Prospectivity: A Review Sam Green 1, Stephen A O'Connor 1, Alexander P Edwards 2 1 Ikon Science, Durham, UK, 2 Ikon Science, Teddington,
More informationNAPE 2011 Lagos, Nigeria 28 November-2 December 2011 Extended Abstract
T: +44 191 334 2191 E: info@ikonscience.com W: www.ikonscience.com Pore Pressure Prediction in the Niger Delta NAPE 2011 Lagos, Nigeria 28 November-2 December 2011 Extended Abstract PORE PRESSURE PREDICTION
More informationHydrocarbon Volumetric Analysis Using Seismic and Borehole Data over Umoru Field, Niger Delta-Nigeria
International Journal of Geosciences, 2011, 2, 179-183 doi:10.4236/ijg.2011.22019 Published Online May 2011 (http://www.scirp.org/journal/ijg) Hydrocarbon Volumetric Analysis Using Seismic and Borehole
More informationSedimentary Rocks Chapter 6
Sedimentary Rocks Chapter 6 I. What is a sedimentary rock? A. Sedimentary rock 1) Rock made of detrital sediments (such as sand) or inorganic/organic chemical precipitates (such as calcite) 2) Detrital
More informationGEOLOGY MEDIA SUITE Chapter 5
UNDERSTANDING EARTH, SIXTH EDITION GROTZINGER JORDAN GEOLOGY MEDIA SUITE Chapter 5 Sedimentation Rocks Formed by Surface Processes 2010 W.H. Freeman and Company Mineralogy of sandstones Key Figure 5.12
More informationFacies Analysis of the Lower Cretaceous Wilrich Member (Lower Falher) of the Spirit River Formation.
Facies Analysis of the Lower Cretaceous Wilrich Member (Lower Falher) of the Spirit River Formation. Kerrie L. Bann, Ichnofacies Analysis Inc. and Daniel J. K. Ross, Tourmaline Oil Corp. Historically,
More informationGY 402: Sedimentary Petrology
UNIVERSITY OF SOUTH ALABAMA GY 402: Sedimentary Petrology Lecture 12: Petrology of Immature Siliciclastic Sed. Rocks Instructor: Dr. Douglas W. Haywick Last Time 1. Factors promoting beach development
More informationWe LHR1 01 The Influence of Pore Pressure in Assessing Hydrocarbon Prospectivity - A Review
We LHR1 01 The Influence of Pore Pressure in Assessing Hydrocarbon Prospectivity - A Review S. Green (Ikon Science), S.A. O'Connor (Ikon Science) & A.P. Edwards* (Ikon Science) SUMMARY Assessing the prospectivity
More informationMeandering Miocene Deep Sea Channel Systems Offshore Congo, West Africa
Meandering Miocene Deep Sea Channel Systems Offshore Congo, West Africa S. Baer* (PGS), J. E. Comstock (PGS), K. Vrålstad (PGS), R. Borsato (PGS), M. Martin (PGS), J.P. Saba (SNPC), B. Débi-Obambé (SNPC)
More informationReservoir Characteristics researching in Gulong oilfield Putaohua reservoir
IOSR Journal of Engineering (IOSRJEN) ISSN (e): 2250-3021, ISSN (p): 2278-8719 Vol. 04, Issue 08 (August. 2014), V3 PP 39-45 www.iosrjen.org Reservoir Characteristics researching in Gulong oilfield Putaohua
More informationTu E Understanding Net Pay in Tight Gas Sands - A Case Study from the Lower Saxony Basin, NW- Germany
Tu E103 06 Understanding Net Pay in Tight Gas Sands - A Case Study from the Lower Saxony Basin, NW- Germany B. Koehrer* (Wintershall Holding GmbH), K. Wimmers (Wintershall Holding GmbH) & J. Strobel (Wintershall
More informationSedimentary Rocks. Origin, Properties and Identification. Physical Geology GEOL 101 Lab Ray Rector - Instructor
Sedimentary Rocks Origin, Properties and Identification Physical Geology GEOL 101 Lab Ray Rector - Instructor Sedimentary Rock Origin and Identification Lab Pre-Lab Internet Link Resources 1) http://www.rockhounds.com/rockshop/rockkey/index.html
More informationHabitable Environments of Ancient Mars: Deciphering the Rock Record. John Grotzinger
Habitable Environments of Ancient Mars: Deciphering the Rock Record John Grotzinger Modern Mars: Recurring Slope Lineae McEwan et al., 2014 Mars Timeline: Water-related environments Ehlmann et al., 2011,
More informationMasila 1: Shallow shelf carbonate facies variability and secondary reservoir development - Saar Formation Masila block, Yemen
Masila 1: Shallow shelf carbonate facies variability and secondary reservoir development - Saar Formation Masila block, Yemen Kent Wilkinson* Nexen Inc., Calgary, AB kent_wilkinson@nexeninc.com ABSTRACT
More informationEvan K. Franseen, Dustin Stolz, Robert H. Goldstein, KICC, Department of Geology, University of Kansas
Reservoir Character of the Avalon Shale (Bone Spring Formation) of the Delaware Basin, West Texas and Southeast New Mexico: Effect of Carbonate-rich Sediment Gravity Flows Evan K. Franseen, Dustin Stolz,
More informationMinistry of Oil and Minerals Petroleum Exploration & Production Authority BLOCK 85 (Al Uqlah North)
Ministry of Oil and Minerals Petroleum Exploration & Production Authority BLOCK 85 (Al Uqlah North) The Al Uqlah North Block (85) occupies an area of 597 km 2 in the Sabatayn Basin in the province of Shabwah
More informationTh SBT1 14 Seismic Characters of Pore Pressure Due to Smectite-to-illite Transition
Th SBT1 14 Seismic Characters of Pore Pressure Due to Smectite-to-illite Transition X. Qin* (University of Houston) & D. Han (University of Houston) SUMMARY In this study, we strive to understand unloading
More informationFluid-Mud Deposits of the Lower Jurassic Tilje Formation, Offshore Mid-Norway By Aitor A. Ichaso and Robert W. Dalrymple 1
Fluid-Mud Deposits of the Lower Jurassic Tilje Formation, Offshore Mid-Norway By Aitor A. Ichaso and Robert W. Dalrymple 1 Search and Discovery Article #50107 (2008) Posted August 10, 2008 *Adapted from
More informationVail et al., 1977b. AAPG 1977 reprinted with permission of the AAPG whose permission is required for further use.
Well 5 Well 4 Well 3 Well 2 Well 1 Vail et al., 1977b AAPG 1977 reprinted with permission of the AAPG whose permission is required for further use. Well 5 Well 4 Well 3 Well 2 Well 1 Vail et al., 1977b
More informationES120 Sedimentology/Stratigraphy
Midterm Exam 5/05/08 NAME: 1. List or describe 3 physical processes that contribute to the weathering of rocks (3pts). exfoliation frost wedging many others. roots, thermal expansion/contraction also credit
More informationAlaska Oil Discoveries
Identifying new prospects in Alaska's North Slope trends. Chris Williams, MS., PG. Geoscience Advisor Stratigraphic Column Era M.Y.A. Albian ~113 Formation Oil and Gas Producing Areas Kuvlum, Hammerhead.
More informationUNIT 4 SEDIMENTARY ROCKS
UNIT 4 SEDIMENTARY ROCKS WHAT ARE SEDIMENTS Sediments are loose Earth materials (unconsolidated materials) such as sand which are transported by the action of water, wind, glacial ice and gravity. These
More informationMinistry of Oil and Minerals Petroleum Exploration & Production Authority BLOCK 6 (Iryam)
Ministry of Oil and Minerals Petroleum Exploration & Production Authority BLOCK 6 (Iryam) The Iryam Block (6) occupies an area of 3,911 km 2 in the Sabatayn Basin in the province of Shabwah in central
More informationWhat is a sedimentary rock?
Sedimentary Rocks What is a sedimentary rock? Sedimentary rocks are products of mechanical and chemical weathering They account for only 5% of the top 10 miles of the outer crust, yet most of the earth
More informationSedimentary Rocks, Stratigraphy, and Geologic Time
Sedimentary Rocks, Stratigraphy, and Geologic Time A rock is any naturally formed, nonliving, coherent aggregate mass of solid matter that constitutes part of a planet, asteroid, moon, or other planetary
More informationMaturity Modeling of Gomin and South Gomin fields Southern Pattani Basin, Gulf of Thailand
Maturity Modeling of Gomin and South Gomin fields Southern Pattani Basin, Gulf of Thailand Patinya Jaithan Petroleum Geoscience Program, Department of Geology, Faculty of Science, Chulalongkorn University,
More informationCement in Cambrian Sandstone : Assessing the Potential for the Generation of Respirable Silica
Cement in Cambrian Sandstone : Assessing the Potential for the Generation of Respirable Silica J. Brian Mahoney Kent M. Syverson Department of Geology University of Wisconsin-Eau Claire Geologic Setting
More informationMUHAMMAD S TAMANNAI, DOUGLAS WINSTONE, IAN DEIGHTON & PETER CONN, TGS Nopec Geological Products and Services, London, United Kingdom
Geological and Geophysical Evaluation of Offshore Morondava Frontier Basin based on Satellite Gravity, Well and regional 2D Seismic Data Interpretation MUHAMMAD S TAMANNAI, DOUGLAS WINSTONE, IAN DEIGHTON
More informationResearch of geological characteristics in Bashijiqike formation of Keshen-2 gas reservoir, Tarim basin, China
Research of geological characteristics in Bashijiqike formation of Keshen-2 gas reservoir, Tarim basin, China Abstract: CHU Guangzhen Research Institute of Petroleum Exploration and Development - Langfang
More informationFault Rocks. EARS5136 slide 1
Fault Rocks EARS5136 slide 1 Fault rocks Fault rock types Examples of deformation features in cores Microstructures Porosity and permeability Lithological and lithification control EARS5136 slide 2 Deformation
More informationOil & Gas. From exploration to distribution. Week 1 V05 Origin of hydrocarbon resources part 1. Jean-Pierre Deflandre
Oil & Gas From exploration to distribution Week 1 V05 Origin of hydrocarbon resources part 1 Jean-Pierre Deflandre W1V5 Origin of hydrocarbon resources1 p. 1 Introduction to hydrocarbon resources You will
More informationSalt invasion in a Triassic reservoir. A case study from the Southern North Sea
Salt invasion in a Triassic reservoir A case study from the Southern North Sea Agenda Regional setting Triassic gas play Statistical investigation Seismic attribute analysis Conclusions & further study
More informationDiagenesis and reservoir quality of late Palaeozoic carbonates of the Barents Shelf. Peter Gutteridge Cambridge Carbonates Ltd
Diagenesis and reservoir quality of late Palaeozoic carbonates of the Barents Shelf Peter Gutteridge Cambridge Carbonates Ltd Introduction Estimating carbonate reservoir quality is a challenge in exploration
More informationClastic Sedimentary Rocks
Clastic Sedimentary Rocks Alessandro Grippo, Ph.D. Alternating sandstones and mudstones in Miocene turbidites Camaggiore di Firenzuola, Firenze, Italy Alessandro Grippo review Mechanical weathering creates
More informationRock physics and AVO analysis for lithofacies and pore fluid prediction in a North Sea oil field
Rock physics and AVO analysis for lithofacies and pore fluid prediction in a North Sea oil field Downloaded 09/12/14 to 84.215.159.82. Redistribution subject to SEG license or copyright; see Terms of Use
More informationMinerals and Rocks Chapter 20
Minerals and Rocks Chapter 20 Emily and Megan Earth System Science Interconnected Rocks and minerals Interior processes Erosion and deposition Water and air Elements of Earth by weight Made of atoms Earth
More informationFrom loose grains to stiff rocks The rock-physics "life story" of a clastic sediment, and its significance in QI studies
From loose grains to stiff rocks The rock-physics "life story" of a clastic sediment, and its significance in QI studies Prof. Per Avseth, NTNU/G&G Resources Burial depth/temp. Elastic Modulus The rock
More informationEGAS. Ministry of Petroleum
EGAS Ministry of Petroleum EGAS Ministry of Petroleum About The Block Location: N. El Arish offshore block is located in the extreme eastern part of the Egypt s economic water border and bounded from the
More informationLithofacies Characterization of Sedimentary Succession from Oligocene to Early Miocene Age in X2 Well, Greater Ughelli Depo Belt, Niger Delta, Nigeria
Journal of Geosciences and Geomatics, 2018, Vol. 6, No. 2, 77-84 Available online at http://pubs.sciepub.com/jgg/6/2/5 Science and Education Publishing DOI:10.12691/jgg-6-2-5 Lithofacies Characterization
More informationEvaluation of Rock Properties from Logs Affected by Deep Invasion A Case Study
Evaluation of Rock Properties from Logs Affected by Deep Invasion A Case Study Jahan Zeb a, Reece Murrell b a CGG Australia, 1 Ord Street, West Perth, WA 6005 Contact email: Jahan.Zeb@cgg.com b Esso Australia,
More informationUsing Clay Microporosity to Improve Formation Evaluation in Potential ROZs: Cypress Sandstone, Illinois Basin
Using Clay Microporosity to Improve Formation Evaluation in Potential ROZs: Cypress Sandstone, Illinois Basin Leo G. Giannetta, Nathan D. Webb, Shane K. Butler, and Nathan P. Grigsby Illinois State Geological
More informationEGAS. Ministry of Petroleum
EGAS Ministry of Petroleum EGAS Ministry of Petroleum About The Block Location: N. Thekah offshore block is located at about 56 km to the north of the Mediterranean shore line, 85 km to the north west
More informationPetrophysical Rock Typing: Enhanced Permeability Prediction and Reservoir Descriptions*
Petrophysical Rock Typing: Enhanced Permeability Prediction and Reservoir Descriptions* Wanida Sritongthae 1 Search and Discovery Article #51265 (2016)** Posted June 20, 2016 *Adapted from oral presentation
More informationEmily and Megan. Earth System Science. Elements of Earth by weight. Crust Elements, by weight. Minerals. Made of atoms Earth is mostly iron, by weight
Emily and Megan Chapter 20 MINERALS AND ROCKS Earth System Science Interconnected Rocks and minerals Interior processes Erosion and deposition Water and air Elements of Earth by weight Made of atoms Earth
More informationURANIUM RESOURCES IN NEW MEXICO. Virginia T. McLemore New Mexico Bureau of Geology and Mineral Resources, New Mexico Tech, Socorro, NM
URANIUM RESOURCES IN NEW MEXICO Virginia T. McLemore New Mexico Bureau of Geology and Mineral Resources, New Mexico Tech, Socorro, NM Purpose Describe the uranium industry in New Mexico, with emphasis
More informationBahamian Dolomites. Occurrences in the Bahamas 2/25/2009. Platform Dolomites. Cretaceous Dolomite. San Salvador Little Bahama Bank.
Bahamian Dolomites A Short Course VU March, 2009 Peter Swart University of Miami Occurrences in the Bahamas Platform Dolomites San Salvador Little Bahama Bank Bahamas Drilling Project Unda Clino Cretaceous
More informationRWE Dea UK SNS Limited (50%), Faroe Petroleum (UK) Limited
1. Licence information Licence Number P1975 Licence Round 27 th (2012) Licence Type Traditional Blocks 3/28c & 9/3e Licensees Work Programme 2. Synopsis RWE Dea UK SNS Limited (50%), Faroe Petroleum (UK)
More informationFormation Evaluation of Unconventional Basaltic Deccan Trap Basement Reservoir of Gamij Field, Cambay Basin, India
Formation Evaluation of Unconventional Basaltic Deccan Trap Basement Reservoir of Gamij Field, Cambay Basin, India Summary Ashok Kumar ONGC, Nazira, Assam The Deecan Trap basaltic rocks form the technical
More informationFORMATION EVALUATION OF SIRP FIELD USING WIRELINE LOGS IN WESTERN DEPOBELT OF NIGER DELTA
FORMATION EVALUATION OF SIRP FIELD USING WIRELINE LOGS IN WESTERN DEPOBELT OF NIGER DELTA 1 Obioha C, ²Adiela U. P and ³*Egesi N 1,3 Department of Geology, Faculty of Science, University of Port Harcourt,
More informationGEOL 101 Lecture 7. Weathering, Sediments. Rock Cycle. Least Stable. Most Stable. Weathering Ch. 5. Physical. Chemical
GEOL 101 Lecture 7 Weathering, Sediments S. Kite Photo Bear Butte S.P., SD Rock Cycle Weathering Ch. 5 Physical (later) Chemical (now) Bowen s Reaction Series vs. Goldich s Weathering Series for sand-size
More informationGeology 229 Engineering Geology. Lecture 6. Basic Rock Classification and Engineering Considerations (West, Chs. 2, 3, 4, 5)
Geology 229 Engineering Geology Lecture 6 Basic Rock Classification and Engineering Considerations (West, Chs. 2, 3, 4, 5) Outline of this Lecture 1. Rock types and rock cycle 2. Geological and engineering
More informationA comparison of structural styles and prospectivity along the Atlantic margin from Senegal to Benin. Peter Conn*, Ian Deighton* & Dario Chisari*
A comparison of structural styles and prospectivity along the Atlantic margin from Senegal to Benin Overview Peter Conn*, Ian Deighton* & Dario Chisari* * TGS, Millbank House, Surbiton, UK, KT6 6AP The
More informationQuestions on the characteristics and generation of subduction-related andesitic magmas at convergent margins (not covered on Midterm exam)
Study Guide for GEOL 285 - Petrology Final Exam Fall 2005 The exam will be held at 8-10 am, Wednesday, Dec. 14, 2005 in Room 310, White Hall will be available to answer questions on Monday, Dec. 12, and
More information