石油实验地质2016，Vol.38Issue(6)：836-841,6.DOI:10.11781/sysydz201606836
高温水热增压实验研究及地质启示
Experimental analysis of aquathermal pressuring under high temperature conditions and its geological implications
摘要
Abstract
Overpressure generation mechanism is very important for the research of hydrocarbon accumulation. We collected samples from typical wells in high temperature basins, made use of a double⁃axial pressurization testing system for pore fluid aquathermal pressuring, and measured the amplitude of aquathermal pressuring for different geological conditions. Results indicated that the relationship between temperature and pressure was not linear but exponential on the condition of high aquathermal pressuring in shale sealed systems, while the amplitude of aquathermal pressuring in isolated systems was higher than that in shale sealed systems. The fine variation of properties of sealed shales would lead to a large amplitude of aquathermal pressuring in shale sealed systems, and the greater porosity of sand samples would lead to larger amplitude of aquathermal pressuring. Experimental re⁃sults induced two geological implications. In high temperature basins, aquathermal pressuring in shale sealed sys⁃tems increases significantly with burial depth. It cannot be neglected and could be one of the main overpressure generation mechanisms. The quality of sealed shale decides the amplitude of aquathermal pressuring, and sand porosity could affect the amplitude of aquathermal pressuring, so in geological conditions, high porosity sand em⁃bedded in low porosity shale layers is more likely to lead to aquathermal pressuring.关键词
水热增压/超压形成机制/高温水热增压实验/孤立体系/泥岩封闭体系Key words
aquathermal pressuring/overpressure generation mechanism/high temperature aquathermal pre-ssuring experiment/isolated system/shale sealed system分类
能源科技引用本文复制引用
郭志峰,刘震,刘鹏,柳万春..高温水热增压实验研究及地质启示[J].石油实验地质,2016,38(6):836-841,6.基金项目
“十二五”国家科技重大专项“南海北部深水区成藏组合评价研究”（2011ZX05025－002－05）资助。 （）
