英西下干柴沟组上段碳酸盐岩油藏成藏过程及分布规律  

Accumulation and Distribution of Carbonate Rock Reservoirs in Upper Section of Lower Ganchaigou Member in Yingxi Area

作　　者：崔俊[1] 周莉[1] 施奇 安小絮 毛建英[1] 王燕 CUI Jun;ZHOU Li;SHI Qi;AN Xiao-xu;MAO Jian-ying;WANG Yan(Research Institute of Exploration and Development,CNPC Qinghai Oilfield Company,Dunhuang 736202,Gansu,China)

机构地区：[1]中国石油青海油田公司勘探开发研究院,甘肃敦煌736202

出　　处：《承德石油高等专科学校学报》2023年第1期1-7,39,共8页Journal of Chengde Petroleum College

基　　金：国家重大科技专项(致密油富集规律与勘探开发关键技术):2016ZX05046。

摘　　要：为了明确柴达木盆地英西下干柴沟组上段(E_(3)^(2))碳酸盐岩油藏成藏过程及分布规律,开展了岩心描述、分析化验、储层特征分析、构造分析等研究。研究认为:英西下干柴沟组上段(E_(3)^(2))为一套半深湖相碳酸盐岩沉积,具有明显混积特征;储层储集空间为广泛发育的晶间孔,以及构造作用产生的裂缝及角砾间孔;油气的持续充注、盐岩盖层的封盖以及储层致密导致该套储层广泛含油,晚喜山构造运动使该套地层“由凹变隆”,并形成了复杂裂缝系统,同时导致油气重新调整和汇聚,形成了现今油藏的“广覆分布、局部甜点”特征。In order to make clear about accumulation and distribution features of carbonate rock reservoirs in the upper section of lower Ganchaigou Member(E_(3)^(2))in Yingxi area of Tsaidam Basin,the study is made from the aspects of core description,analysis and tests,and construction analysis.Study shows that a set of deep-water fine-grained carbonate deposits has developed in E_(3)^(2)in Yingxi area with'obvious mixed characteristics.Reservoir space includes widespread intergranular pore,fracture and breccia pore generated by tectonism.Continuous oil and gas filling,salt caprock and tight reservoir lead to extensive oil-bearing of the reservoirs.The Late Himalayan tectonic movement resulted in the formation"from depression to uplift",and formed a large number of fracture systems.At the same time,it led to the readjustment and convergence of oil and gas,which laid a foundation for high oil and gas production and led to the characteristic of"wide-ranging distribution with local dessert"in hydrocarbon reservoirs.

关 键 词：成藏过程 油藏分布 碳酸盐岩 英西地区 柴达木盆地 

分 类 号：P618.13[天文地球—矿床学]