双河油田高含水高采出程度油藏剩余油分布特征

Distribution characteristic of the remaining oil in high water cut and high recovery percent of reserves reservoir of Shuanghe Oilfield

应用精细油藏数值模拟方法、密闭取心方法,结合油藏动态分析、动态资料测试等方法,根据平面、纵向上和层内分布对双河油田高含水高采出程度油藏Ⅳ5-11层系目前剩余油进行三维定量化描述.结果表明:平面上剩余储量主要集中在含水率大于90%的区域内,在局部构造高点、低渗透部位及井网不完善部位剩余油及可动油饱和度较高,非主流线剩余油饱和度高于主流线;纵向上采出程度差异大,主力小层采出程度高,但剩余储量相对较多,非主力小层采出程度不均匀,剩余储量相对较少;层内剩余油集中在厚油层及正韵律油层顶部及低渗透层段,取心井试油结果与研究结果一致.

Based on the plane,vertical,and internal distribution,the 3D quantitative description of the present remaining oil in high water cut and high recovery percent of reserves in IV5-11 formation of Shuanghe oilfield have been carried out,by the fine reservoir numerical simulation method,sealed coring method,combined with reservoir dynamic analysis,dynamic data testing methodology.The results showed that the plane's remaining reserves are concentrated in the area where the water cut is more than 90%;the remaining oil and recoverable oil saturation is relatively high in local structural high,low-permeability area and well pattern imperfect area;the remaining oil saturation of the non-mainstream line is higher than that of the mainstream line;the extent of vertical mining is very different,the mining extent of the main small layer is high,but the remaining reserves are relatively high;while the mining extent of the non-main small layer is non-uniform,and the remaining reserves are relatively less;the remaining oil is concentrated in the thick oil reservoir layer,top of the rhythm section,and the low-permeability layer.The coring results of testing oil wells are consistent with the research results.