河流和三角洲储层剩余油分布模式——以渤海湾盆地胜坨油田为例

DISTRIBUTION MODE OF REMAINING OIL OF FLUVIAL AND DELTA RESERVOIR——TAKING THE SHENGTUO OILFIELD OF THE BOHAI BAY BASIN AS AN EXAMPLE

摘要: 通过对河流和三角洲相储层的宏观、微观剩余油形成机制和分布规律的研究,建立了剩余油宏观和微观分布模式,指出河流和三角洲相储层的剩余油平面分布主要集中在边缘相带、断层和砂体尖灭线附近以及井网未控制的部位,受沉积微相、断层、砂体分布和井网条件等多种因素控制;层内剩余油分布受层内非均质控制,剩余油主要在河流相正韵律储层的中上部及三角洲相反韵律储层的中下部富集;微观剩余油在孔喉网络中的分布主要有网络状、斑块状、附着状、孤粒孤滴状和油水混相等5种模式。

Abstract: The paper studied mechanism and distribution of macro and micro remaining oil in fluvial and delta reservoir,and built distribution mode of macro and micro remaining oil.The paper put forward that the remaining oil in fluvial and delta reservoir enriched mainly in margin facies,hereabout fault,round wedgeout and part uncontrolled by well.The plane distribution of remaining oil is mainly controlled by sediment microfacies,fault and sand distribution.The interlayer distribution of remaining oil is mainly controlled by vertical heterogeneity.The remaining oil enriched in upside of positive rhythm reservoir of fluvial while in downside of negative rhythm reservoir of delta.Micro remaining oil has five shape types,such as network,speckle,attached,trickle and confuse of oil and water.