摘要
对鄂尔多斯盆地伊-陕斜坡上古生界太原组—山西组砂岩储层中流体包裹体样品进行了分析,将该储层中油气成藏划分为6个期次。结合埋藏史分析,确定了6期油气成藏发生的时间。运用流体包裹体PVT热动力学模拟的方法,获得了6期油气成藏时的古压力数据。对山2段6期次古压力时空分布及演化规律分析表明,区域构造和热史演化是古压力的主要控制因素,可将古压力演化划分为气藏形成初期的常压—成藏高峰期超压—成蔽期后萎缩形成低压3个阶段。
The fluid inclusion samples of sandstone reservoir in the Taiyuan and Shanxi formations of the Upper Paleozoic were analyzed in Yi-Shan Slope of Ordos Basin. The hydrocarbon charging period in the sandstone reservoirs can be divided into six times. The six charging times were determined by integrating the average homogenization temperature with burial historical curves. By employing the PVT thermodynamic modeling of fluid inclusions, the paleo-fluid pressures of the six hydrocarbon charging times were obtained. The paleo-fluid pressures distribution and evolution of the second member of Shanxi Formation showed that the evolution of regional tectonics and geothermal history mainly controlled the paleo-fluid pressure. The paleo-fluid pressure evolution was divided into three stages of hydrostatic pressure in the prophase stage, overpressure in the developing stage and subnormal pressure in the shrinking stage.
出处
《石油学报》
EI
CAS
CSCD
北大核心
2008年第2期226-230,234,共6页
Acta Petrolei Sinica
基金
教育部科学技术研究重点项目“海相碳酸盐岩缝-洞输导体系油气运聚机理研究”(No.106113)资助
关键词
鄂尔多斯盆地
上古生界
流体包裹体
古压力分布
热动力学模拟
Ordos Basin
Upper Paleozoic
fluid inclusions
paleo-fluid pressure distribution
thermodynamic modeling
