海洋地质前沿2026，Vol.42Issue(6)：74-86,13.DOI:10.16028/j.1009-2722.2025.161
利用数值模拟方法定量表征先存断层活化期油气运移能力
Quantitative characterization of hydrocarbon migration capacity of reactivated pre-existing faults using numerical simulation methods:a case from the Xihu Sag,East China Sea Basin
摘要
Abstract
Vertical migration along faults serves as the primary pathway for natural gas in the Xihu Sag,East China Sea Basin,where fault migration capacity controls the gas accumulation.The initial formation of most mi-gration faults predates the hydrocarbon migration.During the basin inversion phase,these faults were inverted and reactivated as pre-existing faults,serving as migration pathway for natural gas.To understand the hydrocarbon ac-cumulation conditions in reservoirs in the Y gas field of the Xihu Sag,the roles of fault geometric characteristics,fault-sand contact,and fault reactivation intensity during the migration period on vertical migration capacity were analyzed.The fault geometric characteristics and fault-sand contact area were determined by seismic interpreta-tion;and the fault reactivation intensity was quantitatively characterized by fault slip velocity that derived from fi-nite element numerical simulation.Through regression analysis of gas column height in reservoirs and the influen-cing factors on fault migration capacity,an index for quantitative evaluation of fault migration capacity was pro-posed,and applied in the Y and Q gas fields,showing good performance as an effective quantitative indicator to the fault migration capacity.This method provided a valuable reference and guidance for exploration activities in the regions with similar petroleum geological conditions.关键词
东海盆地/西湖凹陷/油气运移/有限元数值模拟/断层活化Key words
East China Sea Basin/Xihu Sag/hydrocarbon migration/finite element numerical simulation/faults reactivation分类
海洋科学引用本文复制引用
张若愚,刘云,焦社宝,欧戈,熊志武..利用数值模拟方法定量表征先存断层活化期油气运移能力[J].海洋地质前沿,2026,42(6):74-86,13.基金项目
中海石油(中国)有限公司重大科技专项课题"东海西湖凹陷大中型气田勘探方向及关键技术研究"(KJZX-2023-0101) （中国）
