石油物探2018，Vol.57Issue(3)：362-368,7.DOI:10.3969/j.issn.1000-1441.2018.03.005
页岩气储层地层压力预测方法及其在四川盆地的应用
Pore pressure prediction for shale gas reservoirs and its application in the Sichuan Basin, China
摘要
Abstract
Overpressure in tectonically stable regions of shale gas reservoirs is primarily caused by hydrocarbon generation.Conventional undercompaction-based methods are not applicable in these regions.Based on the Clay-Plus-Silt (CPS) model,along with the hydrocarbon effect,a normal compaction trend (NCT) was constructed using the rock physics modeling approach.The NCT was further combined with Eaton's equation to form a new pressure prediction model for shale reservoirs.This model can better reflect the influence of lithological change on normal compaction velocity with fewer measured pressure data.Combining the normal compaction velocity obtained by forward modeling,using the proposed model,with high-precision poststack impedance inversion,a seismic overpressure prediction workflow for shale gas reservoirs was constructed.Application results of this model from the Sichuan basin of China indicate its superiority in predicting predrill pore pressure.关键词
地层压力/页岩气/CPS模型/Eaton方程/四川盆地/龙马溪组Key words
pore pressure/shale gas/CPS model/Eaton's equation/Sichuan Basin/Longmaxi Formation分类
天文与地球科学引用本文复制引用
胡华锋,胡起,林正良..页岩气储层地层压力预测方法及其在四川盆地的应用[J].石油物探,2018,57(3):362-368,7.基金项目
国家重点基础研究发展计划(973计划)课题(2007CB714107)资助.This research is financially supported by the National Basic Research Program of China (973 Program) (Grant No.2007CB714107). （973计划）
