Ancient Lateral Sealing Evaluation Method of Fault and Its Application in Hydrocarbon Accumulation Period
Wang Chao
Lü Yanfang
Fu Guang
Wang Yougong
Liu Zhe
Sun Tongwen
Hu Xinlei
Abstract：The ability of fault lateral sealing has an important influence on the accumulation and distribution of oil and gas in hydrocarbon accumulation period.However,fault sealing can only be evaluated by the method of lateral sealing of the lower limit at present.Moreover,it is found that find lateral sealing ability of fault and distribution of oil show some inconsistencies in the evaluation process in which wells located in the range of forecast turn out not contain oil and gas.It is found in this study that this phenomenon may be due to the weak ancient lateral seal ability of the fault in the hydrocarbon accumulation period.Therefore,an evaluation method of ancient lateral sealing evaluation metnd of ancient lateral sealing evaluation method of fault is proposed on the basis of the SGR (Shale Gouge Ratio) threshold method of the fault lateral seal,oil and gas,restoring the ancient strata thickness,the ancient fault throw,and the ancient shale content curve in the hydrocarbon accumulation period.This paper selects Wen13 fault trap in the Wenan slope of Jizhong depression as an example,and the fault trap lateral sealing ability is quantitatively evaluated by the ancient fault lateral sealing evaluation method.The results show that the lateral seal hydrocarbon height of the Wen13 fault trap is zero meter,in conformity with the well test results,which indicates that the evaluation method of the ancient fault lateral sealing ability is feasible.For accurate evaluation of the ability of seal hydrocarbon in the fault trap,it is of practical and theoretical significance to reduce the hydrocarbon drilling risk of fault trap,to enrich and perfect the fault lateral seal theory.
Keywords：ancient lateral sealing evaluation method of faultoil and gasancient strata thicknessancient fault throwancient shale content curvequantitative analysispetroleum geology
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：15( 1787-1801 )