See the energy at TGS.com

© 2016 TGS-NOPEC Geophysical Company ASA. All rights reserved.

Lund

Henderson

Lloyd Ridge

Destin Dome

Atwater Valley

De Soto Canyon

Keathley CanyonAlaminos Canyon

Florida Plain

Galveston

High Island Vermilion

Lund South

Port Isabel

Pensacola

Ship Shoal

Amery Terrace

Brazos Area

Eugene Island

Mobile

West Cameron

East Cameron

Mustang Island

Main Pass

Viosca Knoll

South Timbalier

Viosca Knoll

Sigsbee Escarpment

Matagorda Island

Corpus Christi

Ewing Bank

West Delta

Grand Isle

High IslandSouth Addition

West CameronSouth Addition

North Padre Island

South Padre Island

High IslandE. Add, S. Ext

GalvestonSouth Addition

West CameronWest Addition

Main PassS. & E. Addition

Mustang IslandEast Addition

VermilionSouth Addition

South Pass

Ship ShoalSouth Addition

East CameronSouth Addition Eugene Island

South Addition

North Padre IslandEast Addition

High IslandEast Addition

Breton Sound

South Padre IslandEast Addition

BrazosSouth Addition

South Marsh Island

South TimbalierSouth Addition

Chandeleur

South Marsh IslandSouth Addition

South Pelto

South Marsh IslandNorth Addition

West DeltaSouth Addition

Port Isabel

TEXAS

LOUISIANA

MISSISSIPPI

ALABAMA

FLORIDA

86°W

87°W

87°W

88°W

88°W

89°W

89°W

90°W

90°W

91°W

91°W

92°W

92°W

93°W

93°W

94°W

94°W

95°W

95°W

96°W

96°W

97°W

97°W31

°N

31°N

30°N

30°N

29°N

29°N

28°N

28°N

27°N

27°N

26°N

26°N

TGS-NOPEC has used its best efforts to produce this map free of errors, utilization of same shall be at the sole risk of the user.TGS-NOPEC assumes no liability or responsibility for reliance placed thereon.

GULF OF MEXICOMULTI-CLIENT 3D PROJECTS

N:\Public\GIS\Arc Map Documents\GoM\Works_In_Progress\FeliciaB\GOM_PWA_7Mar2016.mxd March 07, 2016

Projection: WGS 1984 UTM Zone 15N

0 10 20 30 405

Miles

TGS PWA Wells

Post Well Analysis (PWA) USA Gulf of MexicoExploration 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 historical well/drilling activity in the GOM to identify an estimated 100 key exploratory, discovery and stratigraphic wells. These wells will be used to create the baseline PWA that will be updated annually with 20-40 new exploratory data points.

The extent of this study and annual updates is to cover wells from onshore to the deep water and provide analysis of the petroleum systems relationships. Additional investigations in Field areas provide both producing wells and offsetting lead wells to incorporate relevant validation of the analysis. Focus of the PWA is towards emerging lower Miocene and Mesozoic reservoirs while providing a comprehensive data base of different play types within the region. All prospective levels in each well are investigated irrespective of the primary target of the well.

© 2016 TGS-NOPEC Geophysical Company ASA. All rights reserved.

Well and Seismic DataThe following data sources provide input to the analysis:

� TGS LAS+ composite logs, well reports, etc.

� TGS and BOEM paleo analysis to provide litho-/chronostratigraphy

� TGS petrophysical database (CPI)

� General Production data from TGS Longbow well performance application

� Geochemical and well pressure data

� Hazard identification from well reports as available

� Support Data from public domain sources

For the evaluation of geometric properties and certain reservoir consideration of traps and for modelling of drainage areas and play types, we will utilize TGS expansive regular regional grid of 2D data and support with modern day 3D as available. Where accessible, TGS interpretations will be provided in context to publicly available references.

DeliverablesThe Gulf of Mexico Post Well Analysis (GOM PWA) is a new GIS-based exploration/field analogue 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 tested features.

Data captured and presented within the product includes both seismic and well analysis of the following:

1. General well / seismic information

2. Reservoirs

� Lithological, stratigraphic and facies features

� Petrophysical parameters (N/G, av. poroperm, sand counts, sand volume, resistivity – porosity cross plot)

3. Traps

� Type (eg pre salt, post salt, salt flank), 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 ViewerThe 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.

� Key Analogues database and information

� Improved understanding of seismic expression and potential pitfalls (risk reduction tool)

For more information, contact TGS at: USTel: +1 713 860 2100 Email: gps-sales@tgs.com

*ACCESS® IS A REGISTERED TRADEMARK OF MICROSOFT CORPORATION IN THE UNITED STATES AND/OR OTHER COUNTRIES