各向异性底水油藏长水平井产能公式  

Productivity formula of long horizontal well in anisotropic bottom-water reservoir

作　　者：汪益宁[1] 李洪[2] 曹淑慧[1] 倪军[2,3] 展转盈 王晖[1] 欧阳静芸[1] 

机构地区：[1]中国兵器工业集团振华石油控股有限公司,北京100031 [2]中国地质大学(北京)能源学院,北京100083 [3]陕西延长石油(集团)有限责任公司研究院,陕西西安710075

出　　处：《油气地质与采收率》2016年第4期108-111,116,共5页Petroleum Geology and Recovery Efficiency

基　　金：国家科技重大专项"致密油气藏数值模拟新方法与开发设计"(2016ZX05009005)

摘　　要：底水油藏水平井产能是油藏工程分析的重要研究内容。现有的底水油藏水平井产能公式均是基于短水平井渗流模型提出的,但对长水平井产能并不适用,为了更准确地评价底水油藏长水平井产能,综合考虑各向异性和油井避水高度对长水平井产能的影响,并运用等值渗流阻力、势的叠加原理以及镜像反映等方法推导出底水油藏长水平井产能公式。通过实例分析发现,各向异性对长水平井产能影响十分显著,其产量较不考虑各向异性的公式所计算的产量同比下降了53.52%,在用短水平井产能模型预测底水油藏长水平井产能时油井的产油量较大,最大可达实际产油量的5.01倍,而底水油藏长水平井产能模型的计算结果则较为准确。Horizontal well productivity in bottom-water reservoir is an important content in the research of reservoir engineering analysis. The existing productivity formula for the bottom-water reservoir are based on short horizontal well flow model,which is not applicable to long horizontal well productivity calculation. In order to evaluate long horizontal well productivity more accurately,productivity formula for long horizontal well in bottom-water reservoir was deduced by using equivalent filtrational resistance,potential superposition principle and mirror image method considering both anisotropy and height of water avoidance. The case study shows that the anisotropy has a significant effect on the long horizontal well productivity. The production predicted by the new formula decreased by 53.52% compared with that obtained from the formula that neglects the effect of anisotropy. Oil production will be exaggerated when using short horizontal well productivity model to predict the long horizontal well. The maximum value can reach 5.01 times that of actual production. Calculation result of long horizontal well productivity model proposed in this paper for the bottom-water reservoir is more accurate than that before.

关 键 词：底水油藏 长水平井 产能公式 各向异性 避水高度 

分 类 号：TE341[石油与天然气工程—油气田开发工程]