吐哈盆地丘东凝析气藏中侏罗统储层流动单元划分

Flow Unit Classification of Mid-Jurassic Reservoir in Qiudong Condensate Gas Reservoir,Tuha Basin

对吐哈盆地丘东凝析气藏中侏罗统储层的流动单元的划分方法和参数选取进行探讨。针对丘东凝析低渗透气藏的储层和流体特点,纵向上对研究区中侏罗统地层进行小层精细划分,平面上应用SPSS统计分析软件对厚度、孔隙度、泥质含量、流动带指数等4个参数进行聚类分析和判别分析,将研究区中侏罗统储层砂体划分为4类流动单元。结果表明各流动单元的类型与储层物性、沉积微相具有很好的对应关系,能够客观地反映气藏储层的地质特征。虽然丘东凝析低渗透气藏中流动单元的划分和油藏中流动单元的划分没有太大差别,但是参数的选取却与油藏中的存在着明显的不同。

Quantitative analysis of flow units has been the theoretical basis of rational and high-efficient development in the condensate gas reservoir of Qiudong, Tuba Basin. On the basis of layer fine division, the paper aims at the flow unit classification evaluation of single sandstone by selecting four parameters as thickness, porosity, shale content and flow zone indicator with the employment of software SPSS. Four flow units are divided in the Mid-Jurassic reservoir of this area. The result demonstrates that the four flow units are in good accordance with reservoir physical property and sedimentary microfacies, and reflects the geological feature of reservoir truthfully and objectively. The research has proved that the division parameter selection and the division method of flow units in regard to condensate gas reservoir can be the theoretical guidance for the development of condensate gas reservoir in Qiudong.