利用常规测井资料识别天然气层方法的研究——以印尼RIPAH油田为例  

RESEARCH OF THE METHOD FOR NATURAL GAS RESERVOIR IDENTIFICATION WITH CONVENTIONAL LOGGING DATA——Applied in RIPAH Oilfield of Indonesia

作　　者：曹佳佳[1] 任彬[2] 谭成仟[1] 张铭[3] 李亚军[1,3] 

机构地区：[1]长安大学地测学院 [2]西安石油大学油气资源学院 [3]中国石油勘探开发研究院亚太所

出　　处：《国外测井技术》2011年第3期21-23,3,共3页World Well Logging Technology

摘　　要：常规测井资料识别天然气主要铱据三孔隙度测井曲线，常用的方法有密度一中子曲线重叠法等。但是密度测井受井眼状况的影响较大，在井眼条件较差的储层段采用密度一中子曲线重叠法不能有效地指示天然气的存在。同时，有些油层也会出现曲线相交。针对这些问题，作者提出了孔隙度曲线重叠法的一种改进方法-视油层中子孔隙度测井法。本文利用油层受井眼状况影响较小的声波时差曲线拟合一条孔隙度曲线与中子孔隙度曲线重叠进行气层识别解释，有效地克服了以上两个不利因素，并且通过在印尼RIPAH油田测井资料的实际应用中证实，该法能高效的进行油气的识别解释工作。Natural gas identification with conventional logging data is mainly based on three porosity logs,such as density-neutron overlap log and so on.But density logging is affected greatly by hole condition.Density-neutron overlap log can not indicate the existence of natural gas exactly in the interval of poor hole condition.Meanwhile,log cross may also appear in some oil layers.In order to solve these problems,the writer proposed an improved method of porosity overlap logs,apparent neutron-porosity logging method.The fitting log of an acoustic differential time log which is less related to the borehole circumstance with a neutron-porosity overlap log is used to identify natural gas.It has overcome the above two negative factors.Practical application in RIPAH oilfield of Indonesia has prvoved that this method can distinguish gas from oil efficiently.

关 键 词：天然气 中子测井 密度测井 视油层 孔隙度 测井曲线拟合 

分 类 号：P618.13[天文地球—矿床学]