基于相似结构的双孔复合油藏的渗流模型研究  

STUDY OF THE SEEPAGE MODEL IN DUAL-POROSITY COMPOSITE MEDIA RESERVOIR BASED ON SIMILAR STRUCTURE OF SOLUTION

作　　者：李全勇[1] 李顺初[1] 李科 李伟 

机构地区：[1]西华大学应用数学研究所 [2]中国石油集团测井有限公司青海事业部 [3]西南石油大学油气藏地质与开发工程国家重点实验室

出　　处：《钻采工艺》2012年第2期54-56,10,共3页Drilling & Production Technology

基　　金：国家科技重大专项项目;名称:鄂尔多斯盆地大型岩性地层油气藏勘探开发示范工程(2008ZX50443-14);西华大学应用数学重点学科资助;名称:应用数学(ZX00910-09-1);西华大学创新基金;名称:双孔油藏考虑二次梯度项的渗流方程解的相似结构(YCJJ200916)

摘　　要：针对双孔复合油藏,建立了引入有效井筒半径在三种外边界条件下的试井分析模型;利用Laplace变换,在Laplace空间中得到了变流率生产情形下的储层压力和井壁压力的精确解;根据相似结构理论,发现了三种外边界条件下的解式具有相似结构,此项研究给编制试井分析软件带来了极大的便利,对油气藏渗流规律的理论研究也具有深远的意义。The seepage model of Dual-porosity composite media reservoir was established, which considered the effective wellbore radius in this paper. By means of Laplace transform, the exact solutions of reservoir pressure and borehole wall pressure were obtained in the case of different boundary conditions in Laplace space. According to the theory of similar structure, there was a similar structure among the solutions under three outer boundaries. Furthermore, this study supplied a lot of convenience for programming well test analysis software and had significance to the theoretical study of the laws of oil-gas seepage.

关 键 词：双孔复合油藏 变流率 有效井径 相似结构 核函数 

分 类 号：TE353[石油与天然气工程—油气田开发工程]