The result of conventional deterministic inversion cannot meet the need for identifying single sand body with high porosity because the lithological structure of the reservoir in 8th Member of Shihezi Formation in Sulige gas field of Ordos Basin is very complex,the sandstone is thin,the porosity is low and the impedance of sandstone and mudstone is severely overlapped.In consideration of this situation and on the basis of an analysis of sensitivity reservoir parameters and key inversion parameters,the authors conducted the study of geostatistics inversion.Research shows that geostatistics inversion technology can effectively integrate geological,logging and 3D seismic data and greatly improve both vertical and lateral resolutions,thus effectively solving the problem of identifying single sand in thin alternating beds of sandstone and mudstone in the 8th Member of Shihezi Formation.In addition,the spatial arrangement of high-porosity sand body can be described correctly based on the statistical relation of P-wave impedance with porosity.The application effect is very inspiring.The application results show that the geo-statistics inversion method is a valuable method for fine reservoir description in the continental tight clastic lithological oil-gas reservoir and hence has an expansive application prospect.
庞崇友, 张亚东, 章辉若, 章雄, 段杰, 黄祥虎, 夏铭. 地质统计反演在苏里格气田致密薄砂体预测中的应用[J]. 物探与化探, 2017, 41(1): 16-21.
PANG Chong-You, ZHANG Ya-Dong, ZHANG Hui-Ruo, ZHANG Xiong, DUAN Jie, HUANG Xiang-Hu, XIA Ming. The application of geostatistics inversion to prediction of compact and thin sand body in Sulige gas field. Geophysical and Geochemical Exploration, 2017, 41(1): 16-21.
