海相油气地质2025，Vol.30Issue(1)：89-96,8.DOI:10.3969/j.issn.1672-9854.2025.01.008
基于岩石物理建模的页岩气地层压力地震预测方法
Seismic prediction method for pore pressure of shale gas formation based on rock physics model
摘要
Abstract
Seismic prediction of formation pressure is of great significance to the evaluation of powerful gas-producing areas and exploration and development of shale oil and gas reservoirs.The study area of western Chongqing is a favorable area for exploration and development of deep shale gas.The shale gas resources in the area are abundant,and formation overpressure is common in the reservoirs.However,due to complex geological conditions,it is difficult to accurately obtain the formation compaction background trend while using conventional formation pressure seismic prediction methods,making it difficult to properly solve the seismic prediction of formation pressure.Usually,the formation compaction background trend is obtained directly through well trend fitting.The established formation compaction background often has large errors,resulting in inaccurate formation pressure prediction.Therefore,this paper constructs the formation compaction background trend through actual logging analysis,based on rock physics theory and rock physics model,which effectively improves the modeling accuracy of formation compaction background trend.By substituting the normal compaction background trend and measured parameters constructed by petrophysical modeling into the bulk modulus equation,the seismic prediction of formation pressure of the study area of western Chongqing in the Sichuan Basin is achieved,and good application results are achieved.By comparing with the actual drilling measured results,it is found that the predicted formation pressure parameters are consistent with the measured formation pressure parameters of multiple wells,indicating the applicability and accuracy of the method.关键词
深层/页岩气/压实背景趋势/岩石物理建模/地层压力/地震预测Key words
deep strata/shale gas/compaction background trend/rock physics modeling/formation pressure/seismic prediction分类
石油、天然气工程引用本文复制引用
石学文,王畅,张洞君,冯艳雯,王群武,曾勇坚..基于岩石物理建模的页岩气地层压力地震预测方法[J].海相油气地质,2025,30(1):89-96,8.基金项目
本文受中国石油天然气股份有限公司科技项目子课题"新区新层系有利区优选与勘探评价关键技术研究"(编号:2023ZZ21YJ04)资助 （编号:2023ZZ21YJ04）
