缝洞单元类型快速识别方法

A fast recognition method of fractured-vuggy unit type

为了对碳酸盐岩储集体类型进行快速划分和识别,针对碳酸盐岩缝洞单元,根据典型井的静态资料,明确缝洞组合模式,选择有代表性的岩心造洞并进行物理模拟实验,分析裂缝-孔洞型单元、孤立溶洞型单元和有基质供液的溶洞型单元的流动特征。通过噪声处理和地层综合压缩系数分析对自喷期流动特征曲线进行校正。根据塔里木油田英买2区块自喷期油压曲线、累积压降-累积产液量曲线、漏失和放空等动态资料以及缝洞单元雕刻图等静态资料,综合压恢试井解释资料,认为英买2区块40口井缝洞单元可划分为4种类型:有基质供液的溶洞型单元、裂缝-孔洞型单元、孤立溶洞型单元和其他类别单元。该方法可应用于今后油藏开发过程中缝洞单元的快速、准确识别。

In order to quickly classify and distinguish carbonate reservoir types,the fractured-vuggy combination pattern of the fractured-vuggy carbonate units was determined based on the data of typical well.Typical cores were selected for holemaking and was applied to physical simulation experiment,and the flow characteristics of the fractured-vuggy type unit,isolated cave type unit and cave type unit with fluid supply by matrix were analyzed.Noise processing and integrated compressibility coefficient analysis was done to correct the flow characteristics curves at flush stage.Based on the oil-pressure curve,cumulative pressure drop vs.cumulative liquid production curve,dynamic data of leakage and venting and static data of sculpture of fractured-vuggy unit at the flush stage in the Yingmai2 block,Tarim Oilfield,the fractured-vuggy units in 40 wells of Yingmai2 block can be classified into 4 types combined with pressure buildup well test data.The cave type units with fluid supply by matrix,fractured-vuggy type units and isolated cave type units and other type units.This method can be applied to the quick recognition of the fractured-vuggy units in the future development of reservoir.