东濮凹陷西南洼断层的油气输导作用与机理探讨

发布时间：2019-01-23 16:10

【摘要】：西南洼是东濮凹陷重要的勘探领域接替区,以其新发现的方里集含油气构造为研究对象,通过油气性质的空间分布探讨了断层对油气运聚的作用。研究表明:不同时期活动的不同类型、不同级别的断层对油气的运聚作用不同,东营末期停止活动的二级断层和三级断层最有利于油气运聚,每个断块都有独立的运聚体系;调节断层(如高平集断层)发育的部位油气相对富集,表现在原油物性变好和天然气干燥系数增加;断块掀斜作用控制了油气的富集和贫化,东营末期的构造掀斜造成局部圈闭油气的调整破坏,新近纪末期充注的油气是研究区重要的勘探对象。油气资源的晚期聚集决定了西南洼具有重要的勘探前景。
[Abstract]:Southwest depression is an important exploration area in Dongpu sag. Taking the newly discovered Fangliji oil and gas bearing structure as the research object, the effect of fault on hydrocarbon migration and accumulation is discussed through the spatial distribution of oil and gas properties. The results show that the migration and accumulation of oil and gas are influenced by different types of faults in different periods. The secondary faults and the third-order faults, which are inactive at the end of Dongying period, are the most favorable for hydrocarbon migration and accumulation, and each fault block has its own migration and accumulation system. The relative enrichment of oil and gas in the part of regulating fault (such as Gao Ping gathering fault) is reflected in the improvement of crude oil physical properties and the increase of natural gas drying coefficient. The fault block tilting controlled the accumulation and dilution of oil and gas. The structural tilting at the end of Dongying caused the adjustment and destruction of local trap oil and gas. The oil and gas filled at the end of Neogene is an important exploration object in the study area. The late accumulation of oil and gas resources determines that the southwest depression has an important exploration prospect.
【作者单位】：中国石化石油勘探开发研究院;中国石化中原油田分公司勘探开发研究院;中国石油大学油气资源与探测国家重点实验室;中国石油大学(北京)地球科学学院;
【基金】：国家自然科学基金项目“断裂体系中幕式流体活动历史的低温热年代学研究”(41572115) 国家科技重大专项课题“东濮凹陷油气富集规律与增储领域”(2016ZX05006-004)
【分类号】：P618.13

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