考虑孔隙影响的流体因子构建方法及应用  

Porosity-involved fluid factor construction method and application

作　　者：纪永祯 雷朝阳 姚铭 代仕明 贾泽宇 JI YongZhen;LEI ChaoYang;YAO Ming;DAI ShiMing;JIA ZeYu(Sinopec Geophysical Research Institute Co.,Ltd.,Nanjing 211103,China)

机构地区：[1]中石化石油物探技术研究院有限公司,南京211103

出　　处：《地球物理学进展》2025年第1期285-293,共9页Progress in Geophysics

基　　金：国家自然科学基金企业创新发展联合基金项目“海相深层油气富集机理与关键工程技术基础研究”(U19B6003);中国石化科技部重点项目“黏声介质高分辨率地震成像与流体预测技术研究”(P23085)联合资助.

摘　　要：四川盆地普光气田X构造碳酸盐岩储层开发潜力大,储层含气性预测是支撑该地区滚动开发的关键技术之一.该区域岩性相对稳定但局部孔隙特征变化快,致使常规含气指示因子受储层孔隙度差异影响,含气指示能力不足,含气检测成果与钻井吻合度差.针对该问题,基于岩石物理建模及流体替换分析,查明了含气和含水储层流体因子混叠的原因,结合孔隙度变化与纵横波阻抗响应的相关性,提出了考虑孔隙影响的流体因子构建方法.联合高精度叠前反演和物性参数预测,形成了适于研究区的含气性预测技术流程,实现了含气储层的准确预测.应用结果表明,使用考虑孔隙影响的流体因子可有效压制孔隙变化对含气性预测的负面影响,提高含气储层的预测吻合率,高效支撑研究区的勘探开发.The carbonate reservoir of X structure in PuGuang gas field of Sichuan Basin has great potential for gas development and gas-bearing prediction technology plays a key role in the rolling development of the area.The lithology in the area is relatively stable but local feature of porosity changes rapidly.The gas-bearing indicators constructed by conventional methods are affected by changing porosity,resulting in insufficient indicating ability and poor consistency between prediction results and drilled wells.Through rock physics modeling and fluid substitute analysis,fluid indicator mixing between gas-and water-bearing reservoir is clarified;Combining the relevance between porosity and P-and S-wave impedance,a gas-bearing indicator construction method considering the influence of porosity was proposed.Based on prestack inversion and porosity inversion method,a gas prediction workflow of the study area is established and accurate prediction of gas-bearing reservoirs is achieved.The application results indicate that porosity-involved fluid factor can effectively suppress the influence of porosity during gas-bearing prediction,improve the prediction accuracy of gas-bearing reservoirs,and efficiently support exploration and development of the study area.

关 键 词：考虑孔隙影响的流体因子 碳酸盐岩 岩石物理 含气性预测 

分 类 号：P631[天文地球—地质矿产勘探]