地质科学2024，Vol.59Issue(6)：1614-1638,25.DOI:10.12017/dzkx.2024.112
地层水渗透作用和构造运动的时差:试论超压形成的两种机制
The time difference between formation water infiltration and tectonic movement:Discussion on the two mechanisms of overpressure formation
摘要
Abstract
Overpressure has an important impact on oil and gas reservoirs,and there are many suggestions for its formation mechanism,but there is still controversy.In areas with thick and well⁃developed caprocks,caprocks can block the escape of hydrocarbons,but cannot block the infiltration of formation water.Therefore,this article collected data on the formation pressure status and Late Cenozoic tectonic change rates of dozens of large basins both domestically and internationally.Based on hydrogeology,it studied the relationship between the permeability of formation water and the changes in formation pressure during sedimentation,subsidence,and uplift processes.Research has found that under conditions of high sedimentation rate and high erosion rate,the infiltration process of formation water will lag behind structural changes,leading to overpressure,especially in the case of gypsum salt layers.If the structure is relatively stable or undergoes low⁃rate structural changes,the formation water will complete the infiltration process in advance,causing the formation pressure to reach an equilibrium hydrostatic pressure state.The abnormal formation pressure mainly depends on the rate of Late Cenozoic tectonic movement.The theory of undercompaction phenomenon and its formation of overpressure is questionable.Four abnormal formation pressure modes have been proposed,including active overpressure,passive overpressure,long⁃term static atmospheric pressure,and abnormal low pressure with large rise and small drop.This study will re⁃understand the phenomenon of overpressure and its impact on oil and gas.关键词
超压/异常地层压力/压力封存箱/生烃增压/水热增压Key words
Overpressure/Abnormal formation pressure/Pressure sealing box/Hydrocarbon⁃generating pressurization/Hydrothermal pressurization分类
天文与地球科学引用本文复制引用
毛小平,陈修蓉..地层水渗透作用和构造运动的时差:试论超压形成的两种机制[J].地质科学,2024,59(6):1614-1638,25.基金项目
国家能源碳酸盐岩油气重点实验室和贵州省重大创新工程项目(编号:[2022]ZD003)资助 （编号:[2022]ZD003）
