摘要
在对东营凹陷133个隐伏砂岩体含油气性详细剖析的基础上,分析了砂岩体含油气性的主控因素,并应用地质统计方法和成藏动力学分析方法,分别建立了圈闭充满度和含油饱和度的预测模型。研究结果表明,东营凹陷隐伏砂岩体能否成藏主要受砂岩体物性、围岩生排烃条件、砂岩体与围岩接触关系及砂岩体自身规模的影响;成藏主动力包括砂泥岩毛细管压力差、烃浓度差引起的扩散力、烃生成产生的膨胀力,成藏阻力主要为砂岩体内的毛细管阻力。模拟结果表明,实测的圈闭充满度和含油饱和度与预测的圈闭充满度和含油饱和度的差异不大,吻合率在80%以上。
The forecast model of oil filling degree and oil saturation are established by detailed analysis and statistics of 133 subtle sandstone in the Dongying Depression and by research on main controlling factors of oil-bearing property as well as by mathematic modeling of hydrocarbon accumulation dynamics mechanism. The research shows that the hydrocarbon accumulation in subtle sandstone is affected by the physical property of sandstone, hydrocarbon generation and expulsion condition of surrounding mudstone as well as the contact between sandstone and mudstone. The research result also shows that major accumulation is mainly driven by capillary pressure difference between sandstone and mudstone, diffussion power from hydrocarbon generation in mudstone and expansion power from hydrocarbon generation in mudstone, and that the major accumulation resistance should include capillary pressure. The mathematic modeling shows that the real oil filling degree and oil saturation is approximately equivalent to the forecasting result and the correlation ratio is more than 80 %.
出处
《地质科技情报》
CAS
CSCD
北大核心
2007年第6期53-58,共6页
Geological Science and Technology Information
基金
国家"十五"科技攻关项目"济阳坳陷隐蔽油气藏成藏研究"(2003BA615A02)
关键词
东营凹陷
隐伏砂岩体
成藏动力
含油气性预测
Dongying Depression
subtle sandstone
hydrocarbon accumulation dynamics
oil-bearing forecast
