石油勘探与开发2017，Vol.44Issue(2)：258-262,5.DOI:10.11698/PED.2017.02.10
异常高压气藏气水两相流井产能分析方法
Productivity analysis method for gas-water wells in abnormal overpressure gas reservoirs
摘要
Abstract
A productivity analysis for gas-water wells in abnormal overpressure gas reservoirs,considering seepage capability changes of gas-water two phases,elastic drive energy of reservoir and fluid,physical property changes caused by stress sensitivity of reservoir etc,is proposed,and the influences of various factors on gas production rate are analyzed by practical examples.Based on generalized Darcy formula and the law of conservation of mass,mathematical models of steady-state and unsteady-state seepage considering stress sensitivity of reservoirs and seepage capability changes of gas-water two phases are established,then,corresponding formulas of gas production rate are deduced.Results of practical example analysis show that:the increase of reservoir water content causes decrease of seepage capability of gas phase,and thus declining the gas production rate,so the influence of seepage capability changes of gas-water two phases on gas production rate cannot be ignored in the process of productivity evaluation for gas-water wells;gas production rate has smaller variations with the increase of stress sensitivity when production pressure drop is small,while gas production rate decreases significantly with the increase of stress sensitivity when production pressure drop is large.Therefore,the production pressure drop of gas wells at the beginning of the development should not be too high for gas reservoirs with high stress sensitivity.关键词
含水气藏/异常高压气藏/应力敏感性/气水两相流/稳态渗流/非稳态渗流/气井产能Key words
water-bearing gas reservoir/abnormal overpressure gas reservoir/stress sensitivity/gas-water two phases/steady-state seepage/unsteady-state seepage/gas well productivity分类
能源科技引用本文复制引用
张辉,王文涛,王磊,汪新光,周伟,曾小明,刘昌为,赵楠,汪来潮,王新斌..异常高压气藏气水两相流井产能分析方法[J].石油勘探与开发,2017,44(2):258-262,5.基金项目
“十三五”重大专项“莺琼盆地高温高压天然气富集规律与勘探开发关键技术”(2016ZX05024005) （2016ZX05024005）
