摘要
大港油田港北南翼区块馆陶组储层岩性多变,储层泥质含量较高,油层与水层电阻率相差较小,给测井解释带来一定困难。笔者从岩性、物性、水性等方面分析了馆陶组低阻油层的成因:馆陶组粘土矿物类型主要以伊蒙混层为主,且地层水矿化度不高,认为造成馆陶组油层低阻的主要成因为高粘土束缚水饱和度和粘土附加导电。在明确馆陶组低阻成因的基础上,运用三孔隙导电模型评价储层的含水饱和度,并利用可动水法分析低阻油层的产液性质。根据三孔隙导电模型及可动水法分析得到的测井解释结论与试油结论相吻合。
In southern Dagang area,Dagang oildfield,the lithology of Guantao Formation is complex,and shale content of reservoir is high,and the resistivity difference is little,so it is difficult to identify the oil-bearing reservoir and water-bearing reservoir by well logging interpretation.Lithology,petrophysical property and water property data are used to analyze genetic feature of low resistivity reservoirs,because illite/smectite formation is the main clay mineral type of Guantao Formation,and formation water salinity is small,so high clay-bound water and additional conductivity of clay are two main causes of low-resistivity reservoirs.Based on analysis of genetic feature,three-pore conductivity model is used to evaluate the electrical conductivity of water saturation,and movable water saturation method is integrated to identify the low-resistivity oil-bearing reservoirs.According to three-pore conductivity mode and movable water saturation method analysis,the conclusions of well-logging interpretation is consistent with the test oil results.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2010年第6期1456-1462,共7页
Journal of Jilin University：Earth Science Edition
基金
国家科技重大专项(2008ZX05009-001-01)
关键词
低阻油层
低阻成因
三孔隙导电模型
测井
low-resistivity oil reservoirs； genesis of low resistivity； three-pore conductivity model； well logging
