缝洞型油藏分类开发  

Separate Development of Fracture and Karst Cave Reservoirs

作　　者：程倩[1] 李江龙[1] 刘中春[1] 张宏方[1] 王英[1] 

机构地区：[1]中石化石油勘探开发研究院,北京100083

出　　处：《特种油气藏》2012年第5期93-96,155,共4页Special Oil & Gas Reservoirs

基　　金：国家"973"项目"碳酸盐岩缝洞型油藏提高采收率基础研究"(2011CB201006);国家重大专项"缝洞型碳酸盐岩油藏提高开发效果技术"(2011ZX05014-003)

摘　　要：缝洞型碳酸盐岩油藏以岩溶、构造运动形成的溶洞、溶蚀孔洞和裂缝系统为主。溶洞呈离散状分布,是主要的储集空间,裂缝是主要的流动通道,具有埋藏深、非均质性强、开发难度大等特点。以塔河7区为例,提出"无因次自喷累计产油"的概念,定量分析井点处的地层能量,将油井出水特征划分为5类。结合物理模拟、单井的生产特征,明确5种出水类型油井钻遇的储集空间类型,分别为能量充足的溶洞型、能量欠充足的裂缝型、能量较充足的裂缝-溶洞型、能量不充足的孤立定容体型和复杂型。根据单井钻遇的储集空间类型,对油井进行聚类分析,细化已有的缝洞单元。对细化后的缝洞单元采取不同的开发对策,指导油藏分类开发。Fracture and karst cave carbonate reservoirs are mainly composed of karst cave,corrosion cavern and fractures which were formed by karst and tectonic movement.Karst cave is discretely distributed and is a main reserving space.Fractures which are characterized of deep buried depth,strong heterogeneity and difficult development are main flow channels.The concept 'dimensionless cumulative production in natural flow period' is raised,the formation energy of well position is quantitatively analyzed and water breakthrough feature of production wells is classified in five types.5 types of reserving space types penetrated in water breakthrough wells are identified by physical simulation and production feature of a single well.The 5 types of reserving space types penetrated in water breakthrough wells are cavern reserving space with enough energy,fracture reserving space with low energy,fracture and karst cave with relatively enough energy and isolated volume and complex types with no enough energy.Separate analyses are carried out for different type of wells and fracture and karst cave are refined based on reserving space types of a single well.Different strategies are adopted to develop different fracture and karst cave reservoirs refined and separate development is guided.

关 键 词：缝洞型碳酸盐岩油藏 分类开发 无因次自喷累计产油 储集空间类型 缝洞单元 塔河油田7区 

分 类 号：TE344[石油与天然气工程—油气田开发工程]