大庆石油地质与开发2026，Vol.45Issue(1)：37-43,7.DOI:10.19597/J.ISSN.1000-3754.202311038
渤海湾盆地廊固凹陷河西务构造带沙河街组断层侧向封闭性定量评价
Quantitative evaluation of lateral sealing of Shahejie Formation faults in Hexiwu structural belt of Langgu Sag in Bohai Bay Basin
摘要
Abstract
Accumulation effect of drilled faults and traps in Hexiwu structural belt exhibits significant differences,and it is difficult to determine the extent of hydrocarbon sealed by various faults,which seriously restricts well de-ployment of undrilled traps in this zone and reservoir expansion during the stage of rolling exploration and develop-ment.Fault lateral sealing plays a crucial role in hydrocarbon preservation and enrichment.Starting from the hydro-carbon column height(H)and shale gouge ratio(ISGR)of fault traps in Hexiwu structural belt of Langgu Sag,fine reservoir dissection are conducted on drilled fault traps based on the identification of the main hydrocarbon sources and areal distribution of hydrocarbon accumulation.Oil and water units are divided to identify the hydrocarbon col-umn height and the critical value of ISGR for fault lateral sealing.The results show that both hydrocarbon column height and shale gouge ratio can be used to characterize the fault lateral sealing,exhibiting a logarithmic relation-ship.Based on the established evaluation chart for fault lateral sealing,the critical value of ISGR for fault lateral seal-ing in studied area is identified as 15.7%,and leakage of faults occurs when ISGR of undrilled trap-controlled faults exceeds the critical value.The research provides effective technical support for the exploration of favorable areas in fault-block oilfields.关键词
断层侧向封闭性/定量评价/烃柱高度/河西务构造带/廊固凹陷/渤海湾盆地Key words
fault lateral sealing/quantitative evaluation/hydrocarbon column height/Hexiwu structural belt/Langgu Sag/Bohai Bay Basin分类
能源科技引用本文复制引用
周振永,陈默,陈媛媛,黄一鹏,张公明,谭钦予..渤海湾盆地廊固凹陷河西务构造带沙河街组断层侧向封闭性定量评价[J].大庆石油地质与开发,2026,45(1):37-43,7.基金项目
中国博士后科学基金项目"孔隙性砂岩内隐蔽性断层变形机制及侧向封闭能力定量评价"(2024M750397). （2024M750397）
