带隔板底水气藏不完善井临界产量及水锥高度计算方法  

Calculation Formula of Critical Production Rate and Water Coning Height for Incompletion Well in Bottom-water Gas Reservoir with Barrier

作　　者：黄全华[1] 陆云[1] 

机构地区：[1]西南石油大学石油与天然气学院,成都610500

出　　处：《世界科技研究与发展》2016年第5期969-972,共4页World Sci-Tech R&D

基　　金：国家科技重大专项(2011ZX05030-005-06)资助

摘　　要：以往的带隔板底水气藏临界产量计算公式大多只考虑了气井底部刚好位于隔板顶端的情况,忽略了打开程度的影响。本文基于多孔介质中质点渗流规律和气体稳定流动及水锥稳定条件,推导带隔板底水气藏不完善井临界产量公式,并分析打开程度对临界产量的影响;通过分区计算临界产量,得到各区临界产量与总临界产量的关系,进而推导出带隔板底水气藏水锥高度的计算公式。该临界产量公式考虑了打开程度和表皮系数的影响;水锥高度计算公式考虑了气井产量对隔板上下区块水锥高度的影响。实例计算表明,考虑了打开程度和表皮系数的临界产量公式和水锥高度计算公式更符合实际情况,对带隔板底水气藏的合理生产具有一定指导作用。The most formerly formulas for critical production rate of the bottom-water reservoirs with partition board,which just only consider the situation the well bottom zone is located at the top of the screen,ignores the influence of the open degree. Based on the law of the particles in porous media seepage and conditions of steady gas flow and the water coning stability,the new calculation formula of critical production rate is deduced for partially penetrated well in the bottom water reservoir with partition board,with the impact of the open degree on the critical production rate analyzed. Through partition of critical production rate computation,the relations between every district＇s critical production rate and the total critical production rate are acquired,with the calculation formula of water coning height for the bottom-water gas reservoir deduced. In the formula of critical production rate,the influence of the open degree and skin factor is considered; In the calculation formula of water coning height,the effect of gas well production on water coning height of up and down partition is taken into account. Example calculation shows that considering the degree of open as well as skin factor formula for critical production rate and water coning height formula conforms to the actual situation,which is of great significance for reasonable production of the bottom-water gas reservoir with partition board.

关 键 词：底水气藏 隔板 打开程度 临界产量 表皮系数 水锥高度 

分 类 号：TE37[石油与天然气工程—油气田开发工程]