摘要
碳酸盐岩潜山是渤海重要的油气藏类型之一.以渤海区域重点开发目标Z油田为例,应用钻测井、岩心、微观薄片及地震等基础资料,对碳酸盐岩储层特征、形成机制及地质发育模式进行综合分析.明确了碳酸盐岩潜山储层岩性以白云岩为主,储集空间为晶间孔、裂缝和溶蚀孔隙.碳酸盐岩潜山储层主要受沉积、成岩及构造因素控制.结合单井特征及垂向岩溶分带性,将潜山纵向分为表层风化带、垂直渗流带和顺层溶蚀带.受成岩、构造等多因素影响,上油组较下油组储层发育,上油组储层全区发育,下油组储层局限发育.明确了岩溶分带及储层展布地质模式,为油田的下步调整和挖潜方向提供依据.
Carbonate rock buried hill is one of the important oil-gas reservoirs in Bohai Sea. Taking Z Oilfield,the key development target in Bohai Sea area as an example, the characteristics, formation mechanism and geological development model of carbonate rock reservoir are comprehensively analyzed by using basic data such as drilling and logging,cores,microscopic thin sections and seismic data. The results show that the lithology of carbonate rock buried hill reservoir is mainly dolomite,with the reservoir spaces of intergranular pore,fracture and dissolution pore.Carbonate rock buried hill reservoir is mainly controlled by sedimentary,diagenetic and structural factors. Combined with the characteristics of single well and vertical karst zonation,the buried hill can be divided into surface weathering zone,vertical seepage zone and bedding dissolution zone. Under the influence of multiple factors such as diagenesis and structure,the reservoir in the upper oil formation is more developed than that in the lower,with full-region development for the former and limited development for the latter. The karst zoning and geological model of reservoir distribution provide the basis for next adjustment and potential tapping direction.
作者
张岚
王少鹏
吴穹螈
唐何兵
李卓
ZHANG Lan;WANG Shao-peng;WU Qiong-yuan;TANG He-bing;LI Zhuo(Bohai Petroleum Research Institute,Tianjin Branch of CNOOC,Tianjin 300459,China)
出处
《地质与资源》
CAS
2023年第1期49-56,共8页
Geology and Resources
基金
国家科技重大专项“渤海海域大中型油气田地质特征”(编号2011ZX05023-006-002)。
关键词
碳酸盐岩
潜山
油气田
岩溶分带
储层模式
渤海湾盆地
carbonate rock
buried hill
oil-gas field
karst zoning
reservoir model
Bohai Bay Basin
