缝洞型碳酸盐岩储层中三种裂缝孔隙度计算方法对比分析  

The comparative analysis of three fracture porosity calculation methods in fractured-vuggy carbonate reservoirs

作　　者：张卫峰 孙兆辉 张晓明[1] 谢芳[2] ZHANG Weifeng;SUN Zhaohui;ZHANG Xiaoming;XIE Fang(Research Institute of Exploration and Development,Northwest Oilfield Company,SINOPEC,Urumqi 831100,Xinjiang;School of Geophysics and Petroleum Resources,Yangtze University,Wuhan 430100,Hubei)

机构地区：[1]中国石化西北油田分公司勘探开发研究院,新疆乌鲁木齐831100 [2]长江大学地球物理与石油资源学院,湖北武汉430100

出　　处：《长江大学学报（自然科学版）》2023年第3期55-65,共11页Journal of Yangtze University(Natural Science Edition)

基　　金：中国石油化工股份有限公司重点科技项目“超深断溶体储集层测井评价技术研究”(P20039-4)。

摘　　要：以塔里木盆地奥陶系缝洞型碳酸盐岩储层为例,将双孔隙度模型裂缝孔隙度计算公式、Peazard-Anderson(P-A)裂缝孔隙度计算公式、裂缝孔隙度经验公式等三种常用的双侧向裂缝孔隙度计算公式计算的裂缝孔隙度,与经岩心CT资料标定的成像测井资料提取的裂缝孔隙度进行比较,对比分析不同裂缝孔隙度计算方法在缝洞型碳酸盐岩储层中的应用情况。研究表明:在缝洞型碳酸盐岩储层中,双孔隙度模型裂缝孔隙度计算公式计算的裂缝孔隙度通常偏小,与成像测井资料提取的裂缝孔隙度存在数量级上的差别;当深、浅侧向电阻率小于1000Ω·m且两者存在幅度差时,P-A裂缝孔隙度计算公式计算的裂缝孔隙度与成像测井资料提取的裂缝孔隙度在同一个数量级上,但整体略微偏小;当深、浅侧向电阻率小于1000Ω·m时,裂缝孔隙度经验公式计算的裂缝孔隙度与成像测井资料提取的裂缝孔隙度较为接近。Taking the Ordovician fractured-vuggy carbonate reservoir in Tarim Basin as an example,the fracture porosity calculated by three commonly used dual lateral fracture porosity calculation methods,i.e.dual porosity model fracture porosity calculation formula,Peazard-Anderson(P-A)fracture porosity calculation formula and fracture porosity empirical formula,was compared with the fracture porosity extracted from imaging logging data calibrated by core CT data.And application situation of different fracture porosity calculation methods in fractured-vuggy carbonate reservoirs was contrasted and analyzed.The result shows that in fractured-vuggy carbonate reservoirs,the fracture porosity calculated by dual porosity model fracture porosity calculation formula is usually smaller and differs in order of magnitude from the fracture porosity extracted from imaging logging data;when the deep and shallow lateral resistivities are less than 1000Ω·m and there is a magnitude difference between them,the fracture porosity calculated by the P-A fracture porosity formula is in the same order of magnitude as the fracture porosity extracted from the imaging logging data,but is slightly smaller overall;when the deep and shallow lateral resistivities are less than 1000Ω·m,the fracture porosity calculated by fracture porosity empirical formula is close to the fracture porosity extracted from imaging logging data.

关 键 词：裂缝孔隙度 双侧向测井 成像测井 岩心CT扫描 缝洞型碳酸盐岩 

分 类 号：P631.84[天文地球—地质矿产勘探] TE132.14[天文地球—地质学]