坪桥区三角洲前缘多期叠加沉积砂层细分方法

Subdivision method of multistage superimposed sedimentary sand layer in delta front of Pingqiao area

三角洲前缘多期叠加沉积储层往往具有极强非均质性,砂层细分是该类油藏实现精细注水开发的重要前提。根据高分辨率层序地层学及储层构型理论,利用标志层法、沉积旋回法、近似厚度法、夹层识别法进行综合分析,将坪桥区三角洲前缘多期叠加沉积的砂层段逐级细化到单一成因砂体,建立了有效的砂层细分方法,并依此制定出满足油藏精细注水需求的砂层细分方案。

The multistage superimposed sedimentary reservoirs in delta front are often highly heterogeneous,and sand subdivision is an important prerequisite for fine waterflood development of such reservoirs.According to theory of high resolution sequence stratigraphy and reservoir configuration,using the method of strata,thickness of sedimentary cycle method,the approximate method,mezzanine identification method for comprehensive analysis of the ping bridge the mutiperiodic overlay deposition of delta front sand section step by step elaboration to the single genetic sand body,set up effective sand layer subdivision method,and accordingly make a meet the demand of fine reservoir waterflood sand layer subdivision scheme.