石油实验地质Issue(1)：102-108,7.DOI:10.11781/sysydz201501102
含烃盐水包裹体P VT模拟新方法及其在气藏古压力恢复中的应用
A new PVT simulation method for hydrocarbon-containing inclusions and its application to reconstructing paleo-pressure of gas reservoirs
摘要
Abstract
PVT numerical simulation of fluid inclusions was an important method to reconstruct the paleo⁃pressure of hydrocarbon accumulations;however, in high⁃maturity gas reservoirs, gas⁃liquid petroleum inclusions were very rare, so the traditional PVT simulation methods could not be applied. It was urgent to develop a new method. Hydrocarbon⁃containing inclusions were widely distributed in gas reservoirs. They could dissolve a little gaseous hydrocarbon and their trapping temperatures were close to homogenization temperatures. Using PVTsim software and combining with some parameters such as vapor/liquid ratio and homogenization temperature of hydrocarbon⁃containing inclusions, a new PVT simulation method was proposed to get the trapping pressure of inclusions, which was then applied to reconstruct the paleo⁃pressure of the Yuanba gas reservoir in the northeast⁃ern Sichuan Basin. The Xujiahe reservoir developed weak overpressure at about 160 Ma, and the pressure coeffi⁃cient reached 1.11. Then the paleo⁃pressure increased rapidly until 148 Ma at which time the pressure coefficient reached 1.86. At about 100 Ma, the paleo⁃pressure reached its peak, but the pressure coefficient decreased to 1.60 because the formation burial depth was the deepest. The comprehensive analyses of hydrocarbon generation, paleo⁃pressure evolution and reservoir⁃cap combination indicated that the overpressure transferred from source rock to reservoir through the process of hydrocarbon generation and accumulation was an important mechanism for the development of overpressure in the Xujiahe reservoir.关键词
含烃盐水包裹体/PVT模拟/古压力/须家河组/元坝地区/川东北Key words
hydrocarbon-containing inclusion/PVT simulation, paleo-pressure/Xujiahe Formation/Yuanba area/northeastern Sichuan Basin分类
能源科技引用本文复制引用
张俊武,邹华耀,李平平,付孝悦,王威..含烃盐水包裹体P VT模拟新方法及其在气藏古压力恢复中的应用[J].石油实验地质,2015,(1):102-108,7.基金项目
国家自然科学基金项目（41472118）资助。 （）
