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Book Chapter

Fault-seal Analysis in the Temana Field, Offshore Sarawak, Malaysia

By
Shutaro Hasegawa
Shutaro Hasegawa
Technology Research Center, Japan National Oil Corporation, Chiba, Japan
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Rasoul Sorkhabi
Rasoul Sorkhabi
Technology Research Center, Japan National Oil Corporation, Chiba, Japan
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Shoji Iwanaga
Shoji Iwanaga
Technology Research Center, Japan National Oil Corporation, Chiba, Japan
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Naofumi Sakuyama
Naofumi Sakuyama
Technology Research Center, Japan National Oil Corporation, Chiba, Japan
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Othman Ali Mahmud
Othman Ali Mahmud
Petroleum Management Unit, Petroliam Nasional Berhad, Kuala Lumpur, Malaysia
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Published:
January 01, 2005

Abstract

The Temana field is located on a structural high in the Balingian province, offshore Sarawak, Malaysia. Fault-sealing assessment of a normal fault in the Tertiary clastic rocks of the Temana field was carried out using shale smear parameters. Shale smear factor values of less than 6 and clay content ratio of greater than 30% on the fault surface indicate across-fault sealing of the reservoir rocks on sand-sand interfaces. Hydrocarbon column height estimated for sandstone pay zones from across-fault pressure difference is comparable to that calculated from the structural spillpoint (76 m; 249 ft). The fault seal thus appears to be efficient enough to support hydrocarbon columns filled down to the structural spillpoints of the reservoirs. Fault-rock permeability calculated from the available calibrations of the clay content-permeability relationship shows lower permeabilities of less than 0.3 md. Taking the Temana fault as a case in point, a new approach to evaluate fault-rock permeability probability (based on integration of clay content, fault displacement, and depth factors) is presented.

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Contents

AAPG Memoir

Faults, Fluid Flow, and Petroleum Traps

Rasoul Sorkhabi
Rasoul Sorkhabi
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Yoshihiro Tsuji
Yoshihiro Tsuji
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American Association of Petroleum Geologists
Volume
85
ISBN electronic:
9781629810065
Publication date:
January 01, 2005

GeoRef

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