About This Item

Share This Item

The AAPG/Datapages Combined Publications Database

AAPG Bulletin

Abstract

AAPG Bulletin, V. 94, No. 4 (April 2010), P. 567591.

Copyright copy2010. The American Association of Petroleum Geologists. All rights reserved.

DOI:10.1306/10130909046

Evaluating hydrocarbon trap integrity during fault reactivation using geomechanical three-dimensional modeling: An example from the Timor Sea, Australia

Laurent Langhi,1 Yanhua Zhang,2 Anthony Gartrell,3 Jim Underschultz,4 David Dewhurst5

1Commonwealth Scientific and Industrial Research Organization Petroleum, ARRC, 26 Dick Perry Ave., Kensington, Perth, WA 6151, Australia; [email protected]
2Commonwealth Scientific and Industrial Research Organization Exploration and Mining, ARRC, 26 Dick Perry Ave., Kensington, Perth, WA 6151, Australia
3Commonwealth Scientific and Industrial Research Organization Petroleum, ARRC, 26 Dick Perry Ave., Kensington, Perth, WA 6151, Australia; present address: Brunei Shell Petroleum, BSP Head Office, Seria, KB 3534, Brunei
4Commonwealth Scientific and Industrial Research Organization Petroleum, ARRC, 26 Dick Perry Ave., Kensington, Perth, WA 6151, Australia
5Commonwealth Scientific and Industrial Research Organization Petroleum, ARRC, 26 Dick Perry Ave., Kensington, Perth, WA 6151, Australia

ABSTRACT

Three-dimensional (3-D) coupled deformation and fluid-flow numerical modeling are used to simulate the response of a relatively complex set of trap-bounding faults to extensional reactivation and to investigate hydrocarbon preservation risk for structural traps in the offshore Bonaparte Basin (Laminaria High, the Timor Sea, Australian North West Shelf).

The model results show that the distributions of shear strain and dilation as well as fluid flux are heterogeneous along fault planes inferring lateral variability of fault seal effectiveness. The distribution of high shear strain is seen as the main control on structural permeability and is primarily influenced by the structural architecture. Prereactivation fault size and distribution within the modeled fault population as well as fault corrugations driven by growth processes represent key elements driving the partitioning of strain and up-fault fluid flow. These factors are critical in determining oil preservation during the late reactivation phase on the Laminaria High.

Testing of the model against leakage indicators defined on 3-D seismic data correlates with the numerical prediction of fault seal effectiveness and explains the complex distribution of paleo- and preserved oil columns in the study area.

Pay-Per-View Purchase Options

The article is available through a document delivery service. Explain these Purchase Options.

Protected Document: $10
Internal PDF Document: $14
Open PDF Document: $24

AAPG Member?

Please login with your Member username and password.

Members of AAPG receive access to the full AAPG Bulletin Archives as part of their membership. For more information, contact the AAPG Membership Department at [email protected].