川西南寒武系筇竹寺组优质页岩地震综合预测

Comprehensive Seismic Prediction of High-Quality Shale in the Cambrian Qiongzhusi Formation in Southwestern Sichuan

摘要: 川西南地区寒武系筇竹寺组地层较老，优质页岩纵向和横向变化较大。筇竹寺组优质页岩的地震预测，重点在于对优质页岩储层参数展布的刻画及可压性和保存条件的评价。通过高精度叠前叠后地震反演，有效预测优质页岩小层厚度及TOC、孔隙度、含气量的平面分布，通过地震脆性预测和基于P波各向异性页岩微裂缝预测评价页岩可压性，结合地层压力预测评价保存条件，形成针对性的预测技术体系，综合评价优质页岩有利区及页岩气勘探开发潜力。

Abstract: The Cambrian Qiongzhusi Formation in the southwestern Sichuan Basin is older, and the high-quality shale has great vertical and horizontal changes. The seismic prediction of high-quality shale in the Qiongzhusi Formation focuses on the description of the distribution of shale reservoir parameters and the evaluation of compressibility and preservation conditions. Through high-precision pre-stack and post-stack seismic inversion, the thickness of high-quality shale layers and the plane distribution of TOC, porosity and gas content are effectively predicted, and shale is evaluated through seismic brittleness prediction and P-wave anisotropic shale micro-fracture prediction Compressibility, combined with formation pressure prediction, evaluation and preservation conditions, forming a targeted prediction technology system to comprehensively evaluate favorable areas of high-quality shale and shale gas exploration and development potential.