用俘获截面解释碳酸盐岩储层孔隙度的方法研究  

Research on explaining porosity in carbonate reservoir by capture cross section method

作　　者：赵琴[1] 马立新[2] 莫修文[1] 王勤聪[2] 

机构地区：[1]吉林大学地球探测科学与技术学院,长春130026 [2]中国石化西北油田分公司工程技术研究院,乌鲁木齐830011

出　　处：《世界地质》2014年第4期875-879,共5页World Geology

基　　金：教育部留学回国人员科研启动基金资助项目(3C1128674423)

摘　　要：塔河油田主要为碳酸盐岩储层,裂隙、缝洞发育,影响常规测井数据的获取和准确性。当不能获得常规测井数据时,可由PND测井的俘获截面SIGMA解释储层孔隙度。根据CATO与饱和度和孔隙度的关系,对SIGMA进行了饱和度校正。计算的孔隙度与CNL有更好的一致性,相关系数高达0.91,证明了SIGMA与CATO联合计算孔隙度方法的有效性,为碳酸盐岩储层裂隙、缝洞发育时的孔隙度解释提供了一种行之有效的方法。The cracks and fracture-caves are very developed in Tahe oilfield composed mainly of carbonate reservoir,which affects the acquisition and accuracy of conventional logging data.When the conventional logging data can not be obtained,capture cross section of PND can be used to explain the porosity of reservoir.According to the relationship among CATO,saturation and porosity,the authors proceed the saturation correction of SIGMA.The results of porosity calculation is better consistent with of CNL,showing 0.91 in correlation coefficient,which proved the efficiency of porosity calculation by SIGMA with CATO,and provided a new method of porosity interpretation when cracks and fracture-caves developed in carbonate reservoirs.

关 键 词：俘获截面 孔隙度 非弹性散射测量 碳酸盐岩储层 评价 

分 类 号：P631.325[天文地球—地质矿产勘探]