成都理工大学学报（自然科学版）2017，Vol.44Issue(6)：676-690,15.DOI:10.3969/j.issn.1671-9727.2017.06.05
沁水盆地南部构造负反转、应力机制及油气意义
Stress mechanism of negative inversion structures and its implication for oil and gas in Southern Qinshui Basin, China
摘要
Abstract
Based on the analysis of regional tectonic background,interpretation of 2 dimensional seismic data,experimental testing of rock mechanics,data of production and numerical simulation of stress,the mechanism of nearly vertical faults developed in the Paleozoic strata in Southern Qinshui Basin are studied.It reveals that this area experienced 3 tectonic cycles and 4 stages of tectonic evolution.The North China plate was characteristic of compressive background,while strike-slip is the local structural features.The negative inversion of structures resulted from the formation of high angle normal fault caused lift and down of basement block,formed horst and graben in the basin.The uplift of horst resulted in the bending of Carboniferous and Permian strata.In hydrocarbon generation period,vertical tensile fractures occur easily in the rocks and provide condition for the formation of regional vertical normal faults and regional stretching environment provides conditions for the formation of negative inversion of structures.This area experienced 2 stages of structural negative inversion in the Palaeozoic strata,one is the early to mid Cretaceous,and the other is the Eogene to Neogene.The former is resulted from the weakly extensional environment.The effect of hydrocarbon formation leads to the occurrence of tensile fractures and the erosion of strata leads to the decease of stress.But the negative inversion of structures is weak in this period.Strong extension,occurrence of stress decease duo to extensive uplift of strata,occurrence of additional stress duo to temperature decrease and occurrence of tensile strain duo to strata and rocks in the Eogene to Neogene periods brings in the extensive negative inversion of structures.The negative inversion of structure affects obviously the trap,migration,accumulation and storage of oil and gas of the tight reservoir in the study area.关键词
沁水盆地/构造负反转/应力机制/油气意义/张性断裂/走滑Key words
Qinshui Basin/structure negative inversion/stress mechanism/oil and gas significance/tensile fracture/strike-slip分类
能源科技引用本文复制引用
尹帅,丁文龙,王凤琴,曹翔宇,刘建军,卢学军..沁水盆地南部构造负反转、应力机制及油气意义[J].成都理工大学学报（自然科学版）,2017,44(6):676-690,15.基金项目
国家自然科学基金项目(41372139,41072098,41572130). （41372139,41072098,41572130）
