鄂尔多斯盆地姬塬地区上三叠统长6段储层成岩非均质性  

Study on the Reservoir Diagenesis Heterogeneity of Chang 6 Member of Upper Triassic in Jiyuan Area of Ordos Basin

作　　者：公繁浩 鲍志东 季汉成 范正平[2] 刘丽 伍星 

机构地区：[1]中国石油大学地球科学学院/油气资源与探测国家重点实验室,北京102249 [2]中国石油天然气集团公司长庆油田分公司第五采油厂,西安710200

出　　处：《吉林大学学报（地球科学版）》2011年第3期639-646,共8页Journal of Jilin University：Earth Science Edition

基　　金：国家'973'重大专项(2006CB202304)

摘　　要：通过对57口钻井的岩心观察,结合岩石薄片、岩石铸体薄片和扫描电镜观测,以及岩石常规物性、X衍射及流体包裹体分析等多种分析测试的综合研究,在明确姬塬地区长6段储层岩石学、物性及成岩作用特征的基础上,探讨了该地区储层成岩非均质的成因及演化过程。研究表明:姬塬地区长6段是以长石砂岩为主的低孔超低渗储层;沉积伊始,受机械分异作用控制,形成原始沉积的孔隙非均质,使不同原始孔隙条件的储层在成岩演化过程中发生差异演化,并经历早期压实、早期酸性水注入、碳酸盐胶结受阻、有机酸及油气注入4个演化阶段,导致储层的成岩非均质性。The origin and evolution of the reservoir＇s diagenetic heterogeneity of Chang6 Member in Jiyuan area is discussed on the basis of identifying the features of its petrology,physical properties and diagenesis,by observation of the cores,thin sections,casting sections and SEM data of 57 wells,as well as comprehensive analysis techniques such as conventional physical properties study,X-ray diffraction and fluid inclusion study.The reservoirs of Chang6 Member in Jiyuan area are mainly low porosity,ultra low permeability arkose.Heterogeneity in original porosity was formed by mechanical differentiation in initial sedimentation.Reservoirs with different original porosities experienced differentiation in later diagenetic evolution.And four stages lead to diagenetic heterogeneity： early compaction,early acidulous water injection,carbonate cementation obstruction,and finally organic acid and hydrocarbon injections.

关 键 词：鄂尔多斯盆地 延长组 成岩非均质性 绿泥石环边 碳酸盐胶结 沉积控制成岩作用 储层 

分 类 号：P618.13[天文地球—矿床学]