基于压力自适应岩石物理模型的深水少井区储层预测
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中图分类号：P631 文献标识码：A DOI：10. 13810/j. cnki. issn. 1000⁃7210. 20240155
Abstract：In deepwater zones under high⁃pressure conditions，the complex and heterogeneous pore structures of reservoirs lead to significant variations in rock elastic properties，making conventional forward modeling and in⁃ version techniques insufficient for accurate reservoir prediction. Petrophysical models serve as a critical bridge between physical properties and elastic parameters of reservoirs. To improve reservoir prediction accuracy in sparsely drilled deepwater zones under high pressure with limited well data，this study incorporates the effects of effective pressure into the petrophysical modeling process. A pressure ⁃dependent correction is applied to the aspect ratio of sandstone pores，and adaptive sandstone porosity is fitted. Based on this，a deepwater sandstone⁃ mudstone petrophysical model with effective pressure correction is established. The proposed petrophysical modeling approach is applied to the deepwater A block in the southern offshore region of China. Compared with conventional petrophysical models，the developed model exhibits higher accuracy in well log reconstruction. Furthermore，to address the low prediction accuracy due to sparse well data，the pressure adaptive petrophysi⁃ cal model is utilized to generate pseudo ⁃wells. The practical application of the method demonstrates that incor⁃ porating multiple pseudo ⁃ wells facilitates more accurate reservoir identification with inversion results. The in⁃ version outcomes show strong agreement with sedimentary facies and drilling data，which validates the effec⁃ tiveness and reliability of the proposed approach.
Keywords：sparsely drilled deepwater zone，effective pressure，sandstone ⁃ mudstone reservoir，petrophysical model，reservoir prediction
刘兵，周怀来，王元君，等 . 基于压力自适应岩石物理模型的深水少井区储层预测［J］. 石油地球物理勘探，2025，60（3）：728‑738.LIU Bing，ZHOU Huailai，WANG Yuanjun，et al. Reservoir prediction in sparsely drilled deepwater zonesbased on pressure adaptive petrophysical model［J］. Oil Geophysical Prospecting，2025，60（3）：728‑738.
0 引言
近年来，随着常规油气资源勘探程度的不断提高，中国海洋油气资源勘探逐步成为油气勘探与开发的主阵地[1⁃3]。（剩余16846字）
