三重介质复合油藏椭圆流试井模型

发布时间：2018-05-23 23:33

本文选题：椭圆流 + 三重介质　；参考：《断块油气田》2017年01期

【摘要】：对于各向同性油藏,由于内外边界条件不同,其流动状态通常为径向流或线性流;但对于渗透率存在各向异性的油藏,其流动状态可能为椭圆流。为此,文中结合椭圆流渗流理论,建立了针对三重介质的复合油藏椭圆流试井解释模型。利用Mathieu函数性质得到了椭圆流模型的拉普拉斯空间解,采用Stehfest数值反演法得到模型在实空间下的解,并绘制了典型试井曲线,对各参数的敏感性进行了分析。根据典型曲线的特点,三重介质复合油藏椭圆流模型存在13个不同的流动阶段。通过分析井筒半径、内区半径、内外区流度比、裂缝储容比、基岩储容比、溶洞窜流系数、基岩窜流系数对试井典型曲线的影响,讨论了考虑椭圆流时三重介质复合油藏试井模型的基本特征。
[Abstract]:For isotropic reservoirs the flow state is usually radial or linear due to different internal and external boundary conditions but for reservoirs with anisotropic permeability the flow state may be elliptical. In this paper, an elliptical flow well test interpretation model for triplet reservoir is established based on the theory of elliptical flow percolation. The Laplace space solution of the elliptic flow model is obtained by using the properties of Mathieu function, the solution of the model in real space is obtained by Stehfest numerical inversion method, and the typical well test curves are plotted, and the sensitivity of each parameter is analyzed. According to the characteristics of typical curves, there are 13 different flow stages in the elliptical flow model of triple medium composite reservoir. The effects of wellbore radius, inner radius, internal and external mobility ratio, fracture reservoir volume ratio, bedrock reservoir volume ratio, cave channeling coefficient and bedrock channeling coefficient on the typical well test curves are analyzed. The basic characteristics of well test model for triplex reservoir considering elliptic flow are discussed.
【作者单位】：中海石油(中国)有限公司天津分公司;中国石油大学(华东)石油工程学院;
【基金】：国家科技重大专项“海上稠油油田高效开发示范工程(二期)”(2011ZX05057);国家科技重大专项课题“厚层非均质气藏产能评价及预测技术”(2016ZX05027004-004) 国家自然基金项目“页岩气藏多级压裂水平井流动特征及产能评价方法研究”(51374227);“致密储层体积压裂缝网扩展模拟研究”(51574265)
【分类号】：TE353

【相似文献】