杏六区东部分流河道砂体渗流单元组合及水淹模式

为了对大庆长垣杏树岗油田杏六区东部浅水三角洲分流河道砂体内三元复合驱层段的水淹程度进行定量化分析，进而确定剩余油饱和度的垂向分布特征。通过岩心观察和渗透率相对变化率的计算，并结合含油饱和度测试数据，在单砂体级别内对具有相似渗流能力的渗流单元及其组合类型进行划分，从而定量化计算不同渗流单元组合类型中的水淹程度。分流河道内共识别出5种细粒沉积类型和3种渗流单元组合类型。通过对不同渗流单元组合类型中水淹特征的认识可为后期剩余油挖潜方案的制定提供依据。

Flow unit combination and water flooding model of distributary channel sand body in eastern Xing-6 block

In order to quantitatively analyze the flooding degree of ASP(alkaline surfactant polymer) flooding layers in shallow water delta distributary channel sand body in eastern Xing-6 block in Xingshugang oilfield, which belongs to Daqing placanticline,the vertical distribution characteristics of remaining oil saturation were determined. Through the observation of coring wells and the calculation results of relative change rate of permeability, and combining with oil saturation test data,different seepage units and their combination types were classified within the single sand body level,and the flooding degree were calculated quantitatively in different combination types of seepage units. A total of five types of fine-grained sediments and three combinations types of seepage units were identified in distributary channel. The understanding of flooding characteristics of different combination types of seepage units can provide geological basis for trapping potential of remaining oil in the later stage.