成都理工大学学报（自然科学版）2016，Vol.43Issue(2)：177-187,11.DOI:10.3969/j.issn.1671-9727.2016.02.04
异常高压与页岩气保存
Abnormal overpressure and shale gas preservation
摘要
Abstract
High production shale gas reservoir is characterized by overpressure coefficient.The abnormal high pressure formation mechanism and failure mechanism of conventional and unconventional reservoirs are studied so as to explore the relationship between shale overpressure and shale gas preservation.Focus is put on the research of different phases of sediment,buried depth and uplift,as well as on the analysis of formation and destruction of abnormal overpressure in the Wufeng-Longmaxi Formation of Well JY-1 in Sichuan Basin.Comparison is also made with the Barnett shale and domestic related drilling wells in order to analyze its fraction of TOC>2% of effective thickness, maturity,brittle minerals,etc.It is recognized that large number of deposition of organism is the premise of formation of abnormal overpressure. These organism materials exhaust volume of hydrocarbon as the buried depth increases and the self-sealing behavior of shale help bring about the formation of abnormal overpressure.Normal destructive mechanisms have little influence on the overpressure of shale because of the self-sealing behavior of shale,but some macroscopic destructive mechanisms,such as strong uplift,overgrown faults,bad bottom and top beds can influence it inch by inch.Micro-fractures along stressed surface caused by change of fluid pressure make the fluid diffusion and improve the influence of macroscopic destructive mechanisms.Tectonic setting and sedimentary environment control the capacity of shale gas and sedimentary facies play a more decisive role.关键词
异常高压/形成机理/保存机制/页岩气Key words
abnormal overpressure/formation mechanism/maintenance mechanism/shale gas分类
能源科技引用本文复制引用
张健,刘树根,冉波,叶玥豪,王自剑,邱嘉文..异常高压与页岩气保存[J].成都理工大学学报（自然科学版）,2016,43(2):177-187,11.基金项目
四川省科技支撑计划项目（15ZC1390）；中国地质调查局地调项目（12120115003801-04）。 （）
