特种油气藏2017，Vol.24Issue(2)：131-135,5.DOI:10.3969/j.issn.1006-6535.2017.02.026
注水开发气顶油藏水平井临界产量计算新方法
New Techniques for Calculation of Critical Productivity in Horizontal Wells for Development of Gas-cap Reservoirs through Waterflooding
摘要
Abstract
Critical productivity can be seen as a key index for proper development of gas-cap reservoirs.But existing techniques for calculation of critical productivity are available to gas-cap reservoirs with depletion development only.In other words, there is no calculation technique available to determine critical productivity of horizontal wells used for development ofgas-cap reservoirs through waterflooding.Under such circumstances, the horizontal well 3D flow field decomposition theory, the 3D flow field of horizontal well can be divided into two horizontal flow fields: internal and external.In each horizontal flow field, critical productivity can be determined in accordance with radial flow theory and static balance of fluids.Eventually, new techniques for calculation of critical productivity in stages with different water contents in horizontal wells for development of gas-cap reservoir through waterflooding can be established in accordance with equivalent seepage resistance theory and oil/water seepage curves.These new techniques have been deployed for adjustment of different operation systems in producers at stages with different water contents for production of crude oil with different viscosity during development of gas-cap reservoirs in the BZ Oilfield.Field application performances show the gas-cap reservoir in the BZ Oilfield displayed outstand performances in control over gas production and in stabilization of oil production.With gas/oil ratios reduced from 150 m3/m3 to 100 m3/m3, oil productivity remain unchanged.Simple and practical, the new techniques can be promoted in other fields.关键词
临界产量/气顶油藏/注水开发/水平井/BZ油田Key words
critical productivity/gas-cap reservoir/waterflooding/horizontal well/BZ Oilfield分类
能源科技引用本文复制引用
刘美佳,陈存良,黄琴,杨明,孙广义..注水开发气顶油藏水平井临界产量计算新方法[J].特种油气藏,2017,24(2):131-135,5.基金项目
国家科技重大专项"渤海油田加密调整及提高采收率油藏工程技术示范"(2016ZX05058001) （2016ZX05058001）
