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Uncertainties Associated with Quantitative Fault Seal Prediction; Case Studies from Sarawak & Sabah Basins-Malaysia
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Asia Petroleum Geoscience Conference and Exhibition (APGCE), Nov 2022, Volume 2022, p.1 - 3
Abstract
Summary
Quantitative fault seal predication concept, methodology and related software developed during last 33 years ( Allan 1989 , Knippe et al 1997, Yielding 2002 , Bretan et al, 2003 ) and became a standard technique in hydrocarbon exploration industry for predrill hydrocarbon column height and ultimately volumetric estimation. Rocks which get entrained in the faulting process- aka Shale Gouge Ratio (SGR)- is one of the main sealing mechanisms when sand juxtaposes sand on either side of the fault ( Fristad et al 1997 , Yielding et al 1997 & Yielding 2002 ). To the latter, statistical data from North Sea, Sarawak and Sabah indicate across fault pressure difference and related hydrocarbon column is a function of relative SGR ( Yielding 2002 , Hisham et al 2022 ). Increasing SGR of up to 50% results in bigger hydrocarbon column at the trap. However, overall data for SGR/pressure and/or SGR/hydrocarbon column height suggest a wide range of pressures and hydrocarbon column for the same percentage of SGR. This presentation focusses on how established methods for calculating hydrocarbon column height can benefit from newly acquired knowledge based on the integrated fault seal analysis of several fields in Sarawak and Sabah basins. This study help understanding predrill sealing capacity and hydrocarbon column height prediction.
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