低阻油层识别技术在老油区勘探目标评价中的应用

APPLICATION OF LOW-RESISTIVITY RESERVOIR IDENTIFICATION TECHNOLOGY IN EVALUATION OF EXPLORATION TARGET IN MATURED OILFIELDS

港中开发区勘探程度高，沙三’油组低阻油层广泛发育，针对低阻油层的成因机理及测井响应特征，阐述了老区测井低阻油层识别方法。测井低阻油层评价指出，研究区稳定分布有6组目的层，测井低阻油层评价基础上，综合应用测井、地质、地震资料相互结合以单砂组为单元，进行测井信息精细等时对比、测井准确层位标定、测井精细落实构造的测井地质评价工作。通过老井复查挖潜获得较好的试油效果，并提出有利构造3个，成功钻探3口井，上报探明石油地质储量1300万吨。

With a high degree of development in the central part of Dagang oilfield,low resistivity reservoirs develop widely in Es31 oil group.The paper formulates the identification method of low resistivity reservoirs with well logging according to the generation mechanism and response characteristics.Low-resistivity reservoir logging evaluation indicates that 6 groups of target zones distribute in the research area.On the basis of low resistivity reservoir logging evaluation,taking single sand group as a unit,well logging,geological and seismic data are combined to conduct fine isochronic comparison,accurate layer calibration,structure confirmation and geological evaluation.Through reinspection of the old wells,preferable oil testing result was gained.3 favorable structures are proposed and 3 wells were drilled successfully.The reported proved oil reserves is 13000000 ton.