2016 U.S. Geological Survey Assessment of Continuous Oil and Gas Resources in the Mancos Shale of the Piceance Basin

Transcription

1 2016 U.S. Geological Survey Assessment of Continuous Oil and Gas Resources in the Mancos Shale of the Piceance Basin U.S. Department of the Interior U.S. Geological Survey Uinta-Piceance Province Colorado and Utah

2 Why Reassess the Mancos? Increased geologic data and knowledge Substantial increase in the number of wells Longer well production histories New technology and well drilling and completion techniques

3 Historic Mancos drilling Previous assessment mean results: 1.7 TCFG, 1.7 MMBNGL Included in previous assessment ~0.6 TCFG produced since 2000 Completion year

4 Gas Consumption and Production 27.5 trillion cubic feet of gas consumption annually by U.S. (EIA) Production to date 1 Piceance Basin: 10.6 TCFG Mancos Shale: 1.3 TCFG Since last assessment (2002): 0.6 TCFG Previous USGS Uinta-Piceance Province assessment: 59 MMBO, 21 TCFG, 43 MMBNGL 1 Production numbers from IHS Energy Group, April 2016

5 Conventional vs. Continuous Resources

6 USGS Assessment Methodology For Continuous Accumulations Geology-based model Identify and outline total petroleum system Probabilistic estimate of oil and gas resources Undiscovered, technically recoverable resource Not economically recoverable resource estimates Not in-place resource estimates

7 Piceance Basin 50 miles Modified from Kirschbaum and Hettinger, 1995

8 Schematic cross section Yurewicz, D.A., et al., 2003

9 Cretaceous Western Interior Seaway (KWIS) More than 20 million years of marine sediment deposition Roberts and Kirschbaum, 1995 Age equivalent Niobrara Formation (Rockies) Eagle Ford, Austin Chalk (TX) First and Second White Specks (Canada) Ma

10 Laramide Orogeny Uplift features associated with Laramide orogeny preserved KWIS sediments Piceance Basin is one of many Rocky mountain basins that segments coeval WIS sediments Digital Data Services

11 CL-1 AB-2-11 MANCOS SHALE 2016 Wells are vertical, directional, horizontal Bulk of new drilling targets 2 intervals within Niobrara Member of Mancos Shale MANCOS TYPE LOG GR RHOB DIR MESAVERDE UPPER MANCOS SANDS PRAIRIE CANYON* NIOBRARA* DAKOTA DYCO PET CORP LOWER MANCOS *USGS MBR STATUS

12 Mancos Shale Assessment Units

13 CL-1 AB-2-11 AU - Lower Mancos Tight Gas Reservoirs Interbedded silt- and sandstone within the Blue Hill Member Source rocks Organic rich Juana Lopez and Montezuma Valley members have 4-6 wt% TOC ***Immature %R o = 0.55 (calculated from Tmax)

14 CL-1 AB-2-11 AU Lower Niobrara Tight Gas Coniacian (Scaphites depressus?) Kent, 1968 regressive phase Source Hydrocarbons migrated from other intervals Reservoir Argillaceous siltstones and very fine-grained detrital silts Heavily bioturbated siliciclastic interval feet thick

15 Lower Niobrara depositional model Insert Graphics Kent, 1968

16 CL-1 AB-2-11 AU Upper Niobrara Shale Gas and Oil Santonian (Clioscaphites vermiformis) Kent, 1968 Self-sourced reservoir feet thick WPX s Beast well, GM H, has produced >3BCF to date NIOBRARA*

17 Paleoecology COCCOSPHERE 5 um Grass of the sea

18 CL-1 AB-2-11 MANCOS SHALE AU Upper Mancos Tight Gas Proximal to distal shoreface deposits Iles Formation (Corcoran, Cozette, Rollins) Castlegate, Sego, Morapos Offshore marine sandy siltstones in Prairie Canyon Mbr (Mancos B) Sands/silts are reservoirs for migrated Mancos oil and gas and vary in quality Porosity Permeability Water saturation Thickness Lateral extent Multiple reservoirs are usually commingled within a single directional well MANCOS TYPE LOG GR RHOB DIR MESAVERDE DAKOTA DYCO PET CORP UPPER MANCOS SANDS PRAIRIE CANYON* NIOBRARA* LOWER MANCOS *USGS MBR STATUS

19 Mancos Shale Assessment Results Per Assessment Unit Mean Volume in Trillion Cubic Feet of Gas (TCFG), Millions of Barrels of Oil (BBO), Million Barrels of Natural Gas Liquids (MMBNGL)

20 Mancos Shale Assessment Results Per Assessment Unit Mean Volume in Trillion Cubic Feet of Gas (TCFG), Millions of Barrels of Oil (BBO), Million Barrels of Natural Gas Liquids (MMBNGL)

21 Mancos Shale Assessment Summary Undiscovered, technically recoverable resources Continuous oil and gas resources (6 assessment units) Oil: 74 million barrels of oil (MMBO) Gas: 66 trillion cubic feet of gas (TCFG) Natural Gas Liquids: 45 million barrels natural gas liquids (MMBNGL) 34 TCFG 66 TCFG 112 TCFG F95 MEAN F5 Additional information and USGS fact sheet:

22 QUESTIONS?