摘要
英买力低凸起周缘凹陷的寒武—奥陶系海相烃源岩发育,上奥陶统泥岩与中下奥陶统灰岩缝洞体形成有效的储盖组合,内幕区灰岩中发育的构造—岩性圈闭与周缘凹陷区古生界油气生成、运聚时空配置关系较好。奥陶系内幕区灰岩储层的非均质性较强,储层类型在构造高部位以构造裂缝型为主,周缘斜坡区以溶蚀缝洞型为主。目前发现的油气藏主要集中在构造高部位,钻井油气水分析数据表明,油气藏由多个连通性较差的油水单元或裂缝系统组成,油气富集受储集体缝洞系统分布控制,构造周缘斜坡区的岩溶储层发育带将是内幕区灰岩油气勘探的重点目标。
The Cambrian-Ordovician marine facies hydrocarbon source rocks in the Yingmali low uplift margin sag is developed,the Upper Ordovician shale and Middle to Lower Ordovician limestone fracture and cavity form the effective reservoir and seal combination,the structure-lithology traps developed in the inner-region limestone,the oil&gas formation and the migration&accumulation of the oil&gas in the margin sag area match very well in both time and the space.The limestone reservoir in the Ordovician inner-region show very strong heterogeneity,the reservoir type in the high part of the structure mainly belongs to the structure-fractured reservoir,the reservoir type in the low part of the structure was mainly dominated by vuggy reservoir.The reservoirs which have been found were mainly located in the high part of the structure,the drilling oil&gas&water data test show that the reservoirs consist of oil&water units and fracture system with poor connectivity,the richness of the reservoir was controlled by the distribution of the reservoir vuggy system,the lovas reservoir development zone around the structure margin slope zone will be the key oil&gas exploration target for the inner region limestone.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2010年第A01期196-201,240+258,共6页
Oil Geophysical Prospecting
