马厂油田沙三下亚段储层非均质性研究

STUDY OF THE RESERVOIR HETEROGENEITY OF THE LOWER SUBMEMBER OF THE SHA—3 MEMBER IN THE MACHANG OIL FIELD

笔者对马厂油田沙三下亚段储层的层内、层间及平面非均质性进行了研究,分析了其控制因素,提出了非均质综合评价方法,并进行了非均质评价。认为储层的非均质性受其沉积环境、成岩后生作用和构造运动控制。层内非均质性严重,层间非均质性及平面非均质性较严重;砂组非均质性较强,小层的相对较弱。评价结果表明,本区中等非均质储层分布普遍。

On the basis of a study of the internal, interlayer and plane heterogeneity of the reser-voirs of the lower submember of the Sha-3 member in the Machang Oil Field, this paperanalyses their control factors, proposes the synthetical evaluation method of heterogene-ity, and evaluates reservoir heterogeneity. Reservoir heterogeneity is controlled by its sed-imentary environment, epigenesis and tectonic movement. Internal heterogeneity is veryserious and the interlayer and plane heterogeneity is relatively serious. The heterogeneityof the sand group is more serious than that of the substratum. The evaluation shows that moderately heterogeneous reservoirs are widespread.