石油实验地质2025，Vol.47Issue(6)：1295-1305,11.DOI:10.11781/sysydz2025061295
基于古—今应力场耦合的变质岩潜山有效裂缝储层预测
Prediction of effective fractured reservoirs in metamorphic buried hills based on paleo-present stress field coupling:a case study of Bozhong 19-6 Gas Field,Bohai Bay Basin
摘要
Abstract
The Archean metamorphic buried-hill reservoirs in Bozhong 19-6 Gas Field,Bohai Bay Basin are deeply buried,with complex fracture formation mechanisms and distribution patterns.Research and prediction methods for effective fractured reservoirs are still lacking,seriously restricting the efficient development of this gas field.Based on seismic,core,well logging,and other data,fracture development mechanisms and distribution characteristics of reservoirs were clarified through multi-stage paleo-tectonic stress field analysis.The current stress distribution characteristics in the study area were simulated using the finite element method.Finally,a pre-diction method for effective buried-hill fractured reservoirs was established based on the coupling of paleo-present stress fields.The results showed that:(1)Fracture development in the study area was controlled by multi-stage tectonic movements.Indosinian-Yanshanian compression formed the initial fractures,and Himalayan extension and strike-slip movements reactivated and modified the early fractures.(2)Structurally,the study area could be divided into western compression and eastern strike-slip zones,with the core of the compression zone and the strike-slip zone being favorable areas for fracture development.(3)The current stress field characteristics showed that current maximum horizontal principal stress direction in the study area was generally NEE75°-SEE105°.Influenced by regional dextral strike-slip faults,the current maximum horizontal principal stress direction showed a SEE-E-NEE directional change from west to east.(4)Based on the prediction using paleo-present stress field coupling,effective fractured reservoirs were classified into three categories.Class Ⅰ area,distributed near the core of the compression zone and the strike-slip zone,showed the most developed effective fractured reservoirs.ClassⅡarea was located in high positions of eastern well area near the strike-slip zone.ClassⅢarea,situated in structurally lower positions,exhibited relatively poor development of effective fractured reservoirs.关键词
有效裂缝储层/裂缝发育规律/应力场/变质岩潜山/渤中19-6气田/渤海湾盆地Key words
effective fractured reservoir/fracture development pattern/stress field/metamorphic buried hill/Bozhong 19-6 Gas Field/Bohai Bay Basin分类
能源科技引用本文复制引用
赵雨佳,汪跃,程奇,刘文超,郑华,鲍明阳..基于古—今应力场耦合的变质岩潜山有效裂缝储层预测[J].石油实验地质,2025,47(6):1295-1305,11.基金项目
中国海洋石油有限公司综合科研项目"海上典型油气藏天然气/CO2协同驱替提高采收率研究"(KJZH-2024-2205)资助. （KJZH-2024-2205）
