PREDICTION METHODS OF ADVANTAGEOUS PATHWAYS OF HYDROCARBON MIGRATION BY OIL-SOURCE FAULT AND ITS APPLICATION
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摘要:
在油源断裂厘定及其输导油气优势路径控制因素分析的基础上, 利用三维地震和测井、录井资料, 对油源断裂活动性优势路径、内部岩性优势路径和断面油气势能优势路径进行研究, 综合预测油源断裂输导油气优势路径. 通过加权赋值计算油源断裂输导油气优势路径综合评价参数, 确定油源断裂附近油气成藏有利范围. 利用该方法预测渤海湾盆地冀中拗陷廊固凹陷大柳泉地区F3油源断裂输导油气优势路径, 结果表明: F3断裂共发育3个活动性优势路径、2个内部岩性优势路径和6个断面油气势能优势路径. 油源断裂输导油气优势路径综合评价参数大于1.65的范围为F3断裂附近油气成藏有利范围, 与研究区目前已探明油气分布相吻合. 表明该方法用于油源断裂输导油气优势路径预测是可行的, 有助于寻找油气勘探有利目标.
Abstract:Based on the determination of oil-source fault and analysis of its controlling factors for advantageous pathways of hydrocarbon migration, the 3D seismic, well logging and mud logging data are used to study the advantage pathways on the parts of oil-source fault activity, internal lithology and hydrocarbon potential field, and then to comprehensively predict the advantage pathway of oil-source fault. The comprehensive evaluation parameters of advantageous pathways of hydrocarbon migration by oil-source fault are calculated by weighted assignment to determine the favorable range of hydrocarbon accumulation near the oil-source fault. The method is used to predict the advantageous pathways of hydrocarbon migration by F3 oil-source fault in Daliuquan area of Langgu Sag in Mid-Hebei Depression, Bohai Bay Basin. The results show that there are 11 advantageous pathways developed in F3 fault, including 3 of activity, 2 of internal lithology and 6 of section hydrocarbon potential. The favorable hydrocarbon accumulation area near the F3 fault is restricted by the comprehensive evaluation parameter greater than 1.65, which is consistent with the proven hydrocarbon distribution in the study area, indicating that the method is feasible for the prediction of advantageous pathways for hydrocarbon migration in oil-source fault, and helpful for favorable oil-gas target searching.
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