论文详情
针对碳酸盐岩复杂储层流体识别困难的问题,提出了构建声-电测井联合流体识别因子的方法。利用阵列声波等测井资料计算弹性力学参数,构建流体指示系数以表征各弹性力学参数对流体的敏感性,优选敏感弹性参数构建流体识别因子。基于Gassmann理论和阿尔奇公式,证明在气、水两相均质介质中,传统流体识别因子(F)与电阻率参数(R0/Rt)对气、水相对含量的指示具有一致性,以此为依据构建了新的流体识别因子。对比几种流体识别因子的流体指示系数,显示新的流体识别因子的流体指示系数最大,流体识别能力最强。依据新的流体识别因子和纵横波速度比交会图版确定了区域流体识别标准,将其应用于川东北地区碳酸盐岩储层的流体识别,解释结果与试采结论吻合较好。该流体识别因子为碳酸盐岩储层流体识别提供了有益参考。
Aimed at the difficult problem of fluid identification in complex carbonate reservoirs,a method of establishing the fluid identification factor by joint acoustic and resistivity logging was proposed.After calculating elastic parameters by array acoustic logging data,etc.,fluid indicator coefficient was established to investigate fluid sensitivity of the elastic parameters,then the sensitive parameters were selected to build the new fluid identification factor.Based on Gassmann theory and Archie formula,it is proved that conventional fluid identification factor (F) and resistivity parameter (R0/Rt) had consistency in indicating relative contents of gas and water in the gas-water two phases homogeneous medium.Hereby,a new fluid identification factor from joint use of acoustic logging and resistivity logging was built.Then,fluid indicator coefficients of several fluid identification factors were compared.The result indicated that the new fluid factor had a greater fluid indicator coefficient and stronger ability of fluid identification than the others.According to the cross plot of the new fluid identification factor and the ratio of P-wave velocity and S-wave velocity,the regional fluid identification standard was determined.The application results of the new identification factor to the carbonate reservoir in the Northeast Sichuan show that interpretation results are highly consistent with the conclusions of test data.The new fluid identification factor provides beneficial reference for fluid identification in carbonate reservoirs in the Northeast Sichuan.
国家重点基础研究发展计划(973计划)项目(2011CB202402)资助。