【摘要】 红河油田延长组是致密油气的重要储集层系,为了揭示延长组过剩压力对长6、长8油层组油气富集的影响,利用测井、钻井、录井资料,定量计算了延长组过剩压力,探讨了其平面与纵向分布特征,进行了各油层组油气显示、油层厚度、含油饱和度的叠合对比分析。研究表明:红河油田延长组长7油层组的过剩压力是油气充注的主要动力,油气在源储压差作用下分别向上下进入长6和长8油层组,平面上源储压差与油气富集程度呈正相关关系,且影响着油气的充注下限。更多还原

【Abstract】 Triassic Yanchang Formation in Honghe Oilfield is the major target for tight oil reservoir exploration. In order to determine the effect of overpressure on the petroleum enrichment in Chang 6 and Chang 8 layers,the overpressure in Yanchang Formation was calculated based on well logging,drilling and core logging data,and the lateral and vertical distribution laws of the overpressure were obtained. By comparatively analyzing the overpressure distributions with oil show,oil reservoir thickness and oil saturation distributions,it is held that the overpressure in Chang 7 layer is the main power of hydrocarbon charging,and the pressure difference between source rock and reservoir made hydrocarbon filling in Chang 6 and Chang 8 layers. On the plane,the pressure difference between source rock and reservoiris positively correlated with hydrocarbon enrichment and affected the threshold of hydrocarbon charging.更多还原