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由于F井区三叠系克上组储层纵向上发育多期次砂体,横向上岩性变化剧烈,存在较强的非均质性,所以对岩性圈闭的刻画是本区克上组勘探工作的重点和难点。本次研究首先对基础资料进行以测井资料环境校正及标准化处理为主的一系列严格的质量控制,进而使用可靠的基础数据建立图版进行分析、井震精细标定。最后运用叠后波阻抗反演方法进行储层预测工作。反演结果与出油层吻合良好,平面上与现有地质认识相符,能确定有利砂体分布范围,刻画岩性圈闭,为进一步进行油藏评价奠定了基础。
Because of the multi-stage sand bodies developed longitudinally in the Upper Triassic Member of the Triassic in the F Well, the lithology changes drastically in the lateral direction and strong heterogeneity exists, so the lithologic trapping is characterized by Group exploration focus and difficulty. In this study, a series of strict quality control based on logging data environment correction and standardization is first performed on the basic data, and then the reliable basic data is used to build a plate for analysis and well calibration. Finally, the post-stack wave impedance inversion method is applied to reservoir prediction. The result of inversion is in good agreement with the reservoir, which is consistent with existing geological understanding on the plane. It can determine the distribution range of favorable sand body and characterize the lithologic traps, which lays the foundation for further reservoir evaluation.