TGS GPS- Barents Sea Post Well Analysis 2014
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See the energy at TGS.com © 2016 TGS-NOPEC Geophysical Company ASA. All rights reserved. Barents Sea Post Well Analysis (PWA) Exploration successes occur when all the following prerequisites are fulfilled: Presence of effective RESERVOIR Presence of effective SEAL (top, fault and lateral seals) Presence of TRAP prior to hydrocarbon charge (structural and/ or stratigraphic) Hydrocarbon CHARGE (generation/migration) Hydrocarbon RETENTION after formation of trap By analyzing the reasons for success and failure we can learn more about the hydrocarbon system in which the well was drilled, and improve the chances of success in the future. TGS has reviewed the most representative exploration wells (80) drilled to test prospects in the Norwegian part of the Barents Sea. All prospective levels in each well were investigated irrespective of the primary target of the well.
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Transcript of TGS GPS- Barents Sea Post Well Analysis 2014
See the energy at TGS.com
© 2016 TGS-NOPEC Geophysical Company ASA. All rights reserved.
Barents Sea Post Well Analysis (PWA)Exploration successes occur when all the following prerequisites are fulfilled:
� Presence of effective RESERVOIR
� Presence of effective SEAL (top, fault and lateral seals)
� Presence of TRAP prior to hydrocarbon charge (structural and/or stratigraphic)
� Hydrocarbon CHARGE (generation/migration)
� Hydrocarbon RETENTION after formation of trap
By analyzing the reasons for success and failure we can learn more about the hydrocarbon system in which the well was drilled, and improve the chances of success in the future. TGS has reviewed the most representative exploration wells (80) drilled to test prospects in the Norwegian part of the Barents Sea. All prospective levels in each well were investigated irrespective of the primary target of the well.
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See the energy at TGS.com
© 2016 TGS-NOPEC Geophysical Company ASA. All rights reserved.
Well Data
The following data sources provide input to the analysis:
� Norwegian Petroleum Directorate (NPD) website
� Original composite logs, well reports, etc.
� TGS’ Barents Sea Facies Map Browser (including litho-/chronostratigraphy)
� TGS’ petrophysical database (CPI)
� Geochemical and well pressure data
Seismic Data
For the evaluation of geometric properties of traps and for maturation modelling of drainage areas, a regular regional grid of 2D data has been utilized. This seismic grid consists mainly of the NBR long offset data (approx. 80,000 km). Furthermore, public data (2D and 3D) was used where appropriate.
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Deliverables
The Barents Sea Post Well Analysis (BS PWA) is a new GIS-based exploration aid. It is designed to analyze and explore the full range of factors influencing the presence/quality of trap, reservoir, seal and hydrocarbon charge (including retention) for all prospective levels in all tested structures.
The project addresses 80 released exploration wells by extracting parameter subsets from all prospective intervals.
Data recorded includes:
1. General well information
2. Reservoirs
� Lithological, stratigraphic and facies features
� Petrophysical parameters (N/G, av. poroperm)
3. Traps
� Type, closure, faults and effectiveness
� Timing of emplacement, modification, exhumation, DHI
4. Seals
� Top seal; lithological, stratigraphic and facies features
� Bottom seal, critical seal, waste and thief zones
5. Hydrocarbons
� Type and features of HC columns and/or shows
� Retention
6. Charges
� Lithological, stratigraphic and facies features
� Quality of source in well including average TOC and HI, max maturity, max and present day temp, age of expulsion
� Quality of source in the kitchen
� Migration
Data Viewer
The database is delivered as an ESRI ArcGIS Geodatabase, in Access® or binary format, containing all spatial data and spatial analysis using data types supported by ArcGIS software.
The database also includes images of the following:
� A pie chart scheme that summarizes the results of each well (PDF)
� Lithostratigraphy and wireline data for each well (JPG)
� At least one image of a representative seismic line for each well (PDF)
� At least one grid map for a representative horizon for each well (PDF)
Benefits Include
� Time saving - by having the complete well parameter interpretation in a single location
� Access to collated learning from well failures and successes to facilitate new analytical approaches (within the GIS-environment) to reduce the risk of drilling dry holes in the future
US Tel: +1 713 860 2100Email: [email protected]
For more information, contact TGS at:
