川南地区页岩气地震采集逐点激发井深设计优化及应用效果

——以 NJ⁃RC 区块为例

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中图分类号：P631 文献标识码：A DOI：10. 13810/j. cnki. issn. 1000-7210. 20230426

Abstract：As shale gas exploration in the southern Sichuan area continues to advance，the exploration environ⁃ ment becomes increasingly complex. To obtain higher quality seismic acquisition data，it is important to im ⁃ prove the accuracy of excitation well depth design. However，the current interior design only defines the dy⁃ nam ic range of excitation well depths，while the actual drilling depth still relies on the driller’s identification of the lithology of the bottom well，impacting the accuracy of the excitation depth. Therefore，we propose a method of pointwise excitation well depth design in the NJ ⁃ RC areas. Initially，the reasonable range of well depths is analyzed theoretically and the optimal excitation interval in mudstone is determined through compara⁃ tive experiments. The mid ⁃depth of the mudstone is used as the base data to identify the best excitation surface across the entire area. Subsequently，the design process is refined by integrating geostatistics. The principle analysis，effect comparison，and actual data verification of the entire region and local areas for the four interpola⁃ tion methods are conducted，considering both qualitative and quantitative analyses and sedimentary rock con⁃ straints. In this way，the minimum curvature interpolation method is found to be most suitable for the study area. Verification and application of actual data indicate that the optimized pointwise excitation well depth de⁃ sign can determine the optimal excitation surface across the entire area and specify the best excitation depth for

each well，effectively enhancing the precision of well depth design. This significantly improves the quality of seismic data and provides a reference for the acquisition of similar work.

Keywords：deep shale gas，pointwise excitation well depth design，minimum curvature method，geostatistics 隆季原，赵容容，李玉雯，等 . 川南地区页岩气地震采集逐点激发井深设计优化及应用效果— —以 NJ⁃RC 区块 为例［J］. 石油地球物理勘探，2025，60（3）：667‑678.

LONG Jiyuan，ZHAO Rongrong，LI Yuwen，et al. Optimization and application effect of pointwise excitation well depth design for shale gas seismic acquisition in southern Sichuan：An example from NJ⁃RC areas［J］. Oil Geophysical Prospecting，2025，60（3）：667‑678.

0 引言

四川盆地页岩气资源丰富，在川南地区 NJ⁃RC区块发育富含有机质暗色泥页岩的沉积环境，具有良好的页岩气勘探前景[1-2]。（剩余12971字）