【摘要】 在"相—势"耦合控藏理论的基础上,以东营凹陷胜坨油田为研究对象进行成藏过程定量化分析。在砂砾岩扇体油气成藏期物性恢复和古压力估算的基础上,选取含油饱和度作为定量化分析成藏过程充满度的表征参数,建立了含油饱和度与孔隙度、渗透率和毛细管压力的函数关系式,并计算了3个成藏期的含油饱和度。结合胜坨油田的沉积和构造背景,分析了砂砾岩扇体的扇根封堵差异。3个成藏期的油气充满度都逐渐增加,其中第3期的含油饱和度高达63.54%。油气充注主要发生在第3期,流体能量充足是成藏的关键。分析得出扇根封堵的孔隙度为6.36%～11.67%,实现了"相—势"耦合控藏的定量化表征。更多还原

【Abstract】 Based on the theory of facies-potential coupling control on hydrocarbon accumulations quantitative analysis was made on the ac-cumulation process in Shengtuo Oilfield.Dongying Depression.Based on the physical properties rebuilding and paleopressure esti-mation of hydrocarbon accumulation periods,the oil saturation of glutenite fans was selected for characterizing the fullness while quantitatively analyze the oil and gas accumulation process.The functional relations among oil saturation and porosity,permeabili-ty and capillary pressure were established.And the oil saturation of the 3 hydrocarbon accumulation periods was calculated.Com-bined with the knowledge of the sedimentary environment and tectonic settings,the difference of fan root closure of glutenite fans was analyzed.The oil and gas fullness was incremental during the three hydrocarbon accumulation periods.In the third period,oil saturation was up to 63.54% and oil-gas charging occurred.Adequate fluid energy was the key factor for hydrocarbon accumula-tion.The porosity for fan root closure was at 6.36% to 11.67%.The quantitative characterization of facies-potential coupling control on hydrocarbon accumulation was achieved.更多还原