坨七断块91储层非均质性与剩余油分布研究

以胜坨油田坨七断块沙二段9~1层为例,通过对储层层内韵律性、层间差异性、层内层间隔夹层进行定量评价,揭示了9~1砂体储层层内、层间和平面非均质性特征,指出储层非均质性主要受到沉积相带、砂体展布和隔夹层分布的控制。研究了在储层非均质影响下剩余油的分布特征:在层内、层间非均质性影响下,剩余油主要分布在物性较差注采不完善的储层中;在平面非均质性控制下剩余油分布在平面上非主流线部位和渗透率较差的侧缘相带。

Study of reservoir heterogeneity and the remaining oil distribution of 91 in TuO7 block

Taking the 9~1 stratum of Es-2 in Tuo-7 block of Shengtuo oilfield as an example,intraformational rhyth- micity,interformational difference,barrier and interbed were studied in this paper.The results reveal that reser- voir heterogeneity was controlled by sedimentary facies, the distribution of sandy body and interbed.The distribu- tion of remaining oil affected by reservoir heterogeneity is as follows,the remaining oil mainly distributes in the bad physical property or voidage-injection imbalanced reser- voir and also in the negative main stream line or the bad permeability lateral margin facies belt on the plane.