Stratigraphic Harmonization in West Africa, a multi-country exploration project. Tim Gibbons Manager of Business Development 5 th March 2015

Transcription

1 Stratigraphic Harmonization in West Africa, a multi-country exploration project Tim Gibbons Manager of Business Development 5 th March 2015

2 I saw a crane outside

3 What if we call the same thing by a different name? Formation Fred Formation George

4 And that s just in English Spanish French English Portuguese

5 The Problem Data exchanges are of great importance for petroleum research as they allow for a correlation of the geological characteristics of the basins. Unfortunately, in Africa, data exchanges are hardly useful to the countries because each country has prepared its stratigraphy by using its own nomenclature. This situation does not allow for an easy recognition of formations even of same geological age.

6 The Problem

7 The Solution The African Petroleum Producers' Association (APPA) included in its 8 th Programme of Actions ( ), the elaboration by 2015, of a study on the harmonization of the stratigraphic nomenclature of sedimentary basins in four geographical zones namely North Africa, West Africa, Gulf of Guinea and the Intracratonic Zone. Tender issued in November 2013: TGS responded to all three zones that were issued and won all three. Three other companies requested to tender.

8 African Petroleum Producers Association [APPA] Structure: Continental Intergovernmental organisation Created: 1987 in Lagos, Nigeria, Purpose: Serve as a platform for African petroleum producing countries to cooperate, collaborate, share knowledge and competences in matters relating to oil & gas exploration and production. Current Membership: 18 Countries - Algeria, Angola, Benin, Cameroon, Chad, Democratic Republic of Congo, Congo, Côte d'ivoire, Egypt, Gabon, Ghana, Equatorial Guinea, South Africa, Libya, Mauritania, Niger, Nigeria and Sudan. Head Quarters: APPA Secretariat located in Brazzaville, Republic of the Congo

9 Well Positioned in the Seismic Value Chain M U L T I - C L I E N T S E R V I C E S Geophysical Data 2D Seismic 3D Seismic Wide Azimuth (WAZ) Seismic M-WAZ Seismic Full Azimuth Nodal Seismic Electromagnetics (CSEM) Aeromagnetics Gravity Multibeam Geological Data Digital well data Directional Surveys Production data Seabed / Seep studies Regional geologic interpretation Facies Map Browser Interpretive services Imaging Services Seismic processing Complex depth imaging Proprietary technology Ongoing R&D investment Contract business model 9

10 TGS Interpretation Products Around the World FMB Studies DSDP Projects Interpretation Studies

11 TGS Interpretation Experience and Expertise TGS experience includes: Biostratigraphy, Sedimentology, Petrology, Field Geology, Geophysical interpretation, 2D & 3D seismic interpretation, Regional seismic interpretation, Depth conversion, AVO analysis, Play fairway analysis, Lithology interpretation, Seismic facies analysis, Synthetics generation, Exploration geology, Petrophysics, Integration of potential field data, Seismic processing, Prospectivity studies, Sequence stratigraphy, Salt interpretation, Basin modelling, Prospect risking and evaluation, Prospect and field economics, Micropalaeontology, License round applications TGS has over 60 clients throughout the world who have licensed our products in the last four years.

12 Project Objectives Harmonize the Stratigraphic Nomenclature of the Sedimentary Basins by Compile and correlate data at sub-regional level for a better understanding of the geological characteristics of the sedimentary basins in Africa. Conduct any additional study that may add value to the project. Improve technical skills and expertise of professionals in the oil and gas industry of the concerned countries.

13 Basins and Zones The Intracratonic Zone Niger Chad Gabon Congo DR Congo Angola Nigeria Cameroon The Gulf of Guinea Zone The West Africa Zone Nigeria Eq Guinea Cameroon Gabon Congo DR Congo Angola W Nigeria Togo Benin Ghana Cote d Ivoire

14 Project Scope Harmonization: 1. Build a data set of digital well and seismic data 2. Interpret and correlate stratigraphy across each basin, country and zone 3. Propose a harmonized stratigraphic column for each zone 4. Compile all results in a report Associated Studies: 1. Petrophysical interpretation of all wells used 2. Seismic interpretation 3. Enhanced sequence stratigraphic study with gross depositional environment mapping 4. Play Fairway Analysis based on all other studies

15 Harmonization Project Processes 15 stage process to complete the work: 1. Literature Search 2. Data audit 3. Scanning and digitizing 4. High quality well log creation 5. Preliminary paper interpretation 6. Core descriptions 7. Lithology interpretation 8. Biostratigraphy analysis 9. Interpretation of tops 10. Synthetic seismograms 11. Interpretation of seismic data 12. Build basic litho-, chrono- and sequence stratigraphic scheme per country 13. Correlation between basins per country 14. Correlation between countries 15. Build final scheme and reporting for each Country for each Zone

16 Project Deliverables All data used in the project will be supplied as a deliverable subject to agreements with each of the countries involved. All of the interpreted data will be delivered including: High quality logs Interpreted tops (Chrono, Litho and Sequence) Correlations Cross sections Synthetic Seismograms Seismic correlations Stratigraphic columns for each (sub) basin All deliverables will be referenced to the final harmonized stratigraphic columns. All well data deliverables and stratigraphic columns will be delivered through TGS Facies Map Browser. The final version of the report will also be issued to all clients.

17 Facies Map Browser (FMB) The FMB is a known and trusted application, developed by TGS, to deliver the results of sequence stratigraphic studies and play fairway analyses. The FMB provides all of the well data, well interpretation and GDE maps over the entire basin in a unique visualization environment. The FMB is a visualization interface for reviewing depositional systems models derived from a comprehensive, interpreted well database, tied to reference seismic..

18 Petrophysical Analysis Petrophysical Analysis of all wells included in the harmonization study, assuming that sufficient data exists to permit this analysis. Deliverables: Environmentally corrected log data Individual CPI s Shale / clay volume Variable grain density Porosity Ø (total and effective) Permeability k where cored Connate water resistivity Rw Water Saturation Sw LAS files Documentation of Methodology adopted. Reference will be made to individual wells where appropriate, for example, where there have been data problems, or where an alternative interpretation methodology has been required.

19 Seismic Interpretation Scope 1. The project will review all seismic data available but only a selection will be interpreted, covering the available area / country time horizons will be interpreted as standard 3. Fault picking 4. Depth conversion depending on velocity data 5. Gravity and Magnetic modelling, subject to available data, for interpreting basement and definition of main structural elements Deliverables 1. Seismic Database of all available data in SEGY 2. Nav available as GIS project 3. Seismic Interpretation along each line used (horizons). ASCII format 4. Maps in time and depth (GIS) 5. Fault polygons/patterns (GIS) 6. Documentation/ report (Word/pdf) Incl well tie panels

20 Enhanced Sequence Stratigraphic Study Scope 1. Uses additional wells from the harmonization study 2. Interpretation of depositional environments and facies in each well 3. Gross Depositional Environment mapping Deliverables All data is delivered in the Facies Map Browser, including, where available: Logs Tops Environment and facies Burial history Paleobathymetry TD tables/synths GDE maps --- all 3 rd order sequences subject to sufficient areal and well control Biostrat Core/casing intervals Shows Lithologies Geochem if available Documentation/ reporting (Word/pdf)

21 Play Fairway Analysis Scope 1. Leads catalogue 2. Thermal modelling 3. Seismic Facies analysis utilizing modified Macurda nomenclature (seismic facies type with amplitude and continuity qualifiers) 4. All horizons that could be source, seal or reservoir 5. Common risk segment mapping 6. Revision to FMB GDE maps if required Deliverables All maps are delivered via an updated FMB 1. Seismic Facies Maps 2. Reservoir Distribution Risk Maps 3. Top Seal Distribution Risk Maps 4. Reservoir Temperature Risk Maps 5. Common Risk Segment Maps

22 Well and Seismic numbers Wells Seismic Cote D'Ivoire 90 10,000 Ghana 70 10,000 Togo 7 2,000 Benin 14 2,000 Nigeria ,000 Cameroon ,000 Equatorial Guinea ,000 Gabon ,000 Congo ,000 DR Congo 100 5,000 Angola ,000 Niger 50 5,000 Chad 50 5,000 Total ,000

23 Project Time Frame Project is anticipated to be formally approved by the APPA Council of Ministers in April TGS anticipates that work will start by July 2015, subject to sufficient pre-funding. The Harmonization stage will be complete for all zones within three years. The remaining projects will be delivered over a further three years.

24 Project Time Frame Commercial Actions Clients who are interested to support the project are requested to issue a Letter of Intent to TGS indicating their desire to participate. Formal License Agreements will be issued once the Council of Ministers approves the project. License Agreements will need to be signed before the project starts. Payment will be due within 30 days of the project starting.

25 Project Commercial Proposal TGS will adopt a multi-client approach to funding this project Work on all deliverables will commence once pre-funding target is reached for a zone Project sponsors will enjoy a lower preferential early participant price Licensing will require an initial payment followed by annual subscriptions until project work is completed Initial payment increases year on year and includes all missed subscription payments Minimum commitment is three years Individual country products will only be available once the whole project is complete

26 Client Benefits The project will save exploration companies time and money through the following features: 1. Rapid access to a regional dataset and interpretation for future decision making 2. It provides a homogeneous framework for play modelling and exploration work 3. It consolidates understanding of regional geology and therefore fast tracks understanding of basin development and shortens exploration cycle time 4. Provides a standardized nomenclature to improve the effectiveness of crossborder data exchanges and new ventures analysis 5. Allows in-house technical resources to concentrate on high value prospect definition work 6. Means to technically evaluate new opportunities throughout the region 7. It integrates of all data in a single environment to improve productivity 8. Provides a consistent framework for tracking and coordinating exploration efforts thereby reducing exploration risk

27 Early Participation Benefits Initial sponsors benefit from their involvement by: 1. Helping to guide the final selection of data used in the project 2. Annual participation in reviews of project progress 3. Involvement of staff members in the technical work 4. Access to the product sooner than their competitors 5. Lower cost of the finished product

28 Involvement in technical work TGS would like to invite one person from each sponsor to spend a month working in our London office during the harmonization project. TGS will: Provide the necessary logistical help for visitors Provide the necessary office space and facilities Provide the necessary training and support Client will: Pay all salary and expenses involved Client benefits: Further involvement and direction to the project Understanding of TGS methodologies Early view of the results

29 Invitation TGS proposes to hold a workshop in our London offices in Q to present more technical and project details of the project to interested parties. We would be delighted if you could join us. To register your interest or to ask any questions, please contact gps-sales@tgs.com

30 Thank you Tim Gibbons