摘要
在惠民凹陷江家店地区沙三下亚段、沙四上亚段输导体系特征研究基础上,设计试验模型再现连续和幕式充注条件下油气运聚过程。二维物理模拟试验结果表明,供烃量及充注方式共同控制油气的分布;油源充足的条件下,晚期充注砂体含油饱和度高于早期充注砂体的含油饱和度;幕式充注流体势差高于连续充注流体势差,幕式充注条件下砂体具有较高的平均含油饱和度;同一砂体内,离油源越近,含油饱和度越高;随着储集层内含油量增加,砂体内流体压力大于围岩排替压力时,油气向围岩扩散,砂体内含油饱和度下降。
Based on the characteristics of lower Es3 and upper Es4 transport systems in Jiangjiadian Area of Huimin Depression,an experiment model was designed and the process of hydrocarbon accumulation was reconstructed under continuous (steady) and episodic (unsteady) filling conditions. 2-D physical simulation experiment shows that oil distribution is controlled by hydrocarbon supply amount and filling mode. Under the condition of sufficient oil sources,the oil saturation in the late filling sandstone is higher than that of early filling sandstone. Fluid potential difference under episodic injection condition is higher than that of continuous injection condition,the oil saturation of episodic injection has high average oil saturation. In the same sandbody the nearer the source rock is to the reservoir,the higher the oil saturation is. With the increase of amount of oil in the reservoir,when the sandstone fluid pressure is higher than the displacement pressure of surrounding rocks,the oil and gas spread to the surrounding rocks,and reservoir oil saturation decreases.
出处
《石油天然气学报》
CAS
CSCD
北大核心
2010年第2期6-10,共5页
Journal of Oil and Gas Technology
基金
国家自然科学基金项目(40772081)
山东省自然科学基金项目(Y2008E16)
关键词
油气运聚
模拟试验
连续充注
幕式充注
含油饱和度
江家店地区
oil -gas migration and accumulation
simulation experiment
continuous injection
episodic injection
oil saturation
Jiangjiadian Area
Huimin Depression
