榆树林油田葡萄花油层砂体成因类型与分布特征

在细分沉积微相的基础上,充分利用密井网开发井资料,通过精细地质解剖研究砂体几何形态及其内部结构,识别出榆树林油田葡萄花油层发育4种成因类型的砂体:水上分流河道砂体;水下分流河道砂体;河口坝砂体及席状砂砂体,并建立了不同成因砂体的垂向层序模式及砂体空间展布模式,为油田进一步开发提供了一定地质依据。

GENETIC TYPE AND DISTRIBUTION CHARACTERISTICS OFSANDSTION IN PUTOUHUA GROUP IN YUSHULIN OILFIELD

The aim of this study was to determine the genetic type and vertical sedimentary sequence models of the sandstone reserviors from the Putaohua group in Yushulin oilfield around Daqing, based on core, logging, and sedimentery microfacies. Special emphasis was put on a determination of geometric configuration, size, and spatial distribution of various genetic sand bodies. Putaohua group in Yushulin oilfield with regard to fluviatile delta includes four kinds of sand bodies with different origins: water-above distirbutary, river channel, subaqueous disldbutary river channel, debouch bar and sheet sand body. Nearly all thin-bedded sand bodies of the Putaohua group trend south-north or northwest to southeast. From north to south, distributary channel sand body, dobouch bar sand body and sheet sand body can be observed in order. It shows that different sand bodies developed in inheritance and vertically, from P4 to Pl , the range of each thin-bedded sandstone increass gradually and overlaps towards southeast Determination of the spacial distribution model of various sand bodies in Yushulin oilfield provides a basis for adjustment of development plan for this oilfield.