石油钻采工艺2023，Vol.45Issue(4)：463-470,515,9.DOI:10.13639/j.odpt.202302067
深层页岩气井气水两相产能预测
Production forecast of deep shale gas wells based on gas-water two-phase flow
摘要
Abstract
Two-phase flow of gas and water is vital for the production capacity of deep shale gas wells,and it is of great significance to investigate the two-phase production performance of gas and water,for evaluating the reservoir stimulation effects.The production forecast model of multi-stage fractured horizontal wells of deep shale gas was built,considering the two-phase gas-water flow in the fracturing fluid-invaded zone(water invasion zone)and fractures.The presented model was combined with the material balance equation,and the semi-analytical solutions of this model were obtained via the successive iteration approach.The liability and practicability of this model were validated using both the commerical numerical simulator and field production data,and the effects of the sensitive parameters of the water invsion zone(width,water saturation and permeability of the water invasion zone)on production capacity of wells were analyzed.The results showed that the built model can deliver reasonable prediction of production capacity of deep shale gas wells.The shale gas production drops with the expanding width and increasing water saturation of the water invasion zone,and yet climbs up,with the growing permeability of the water invasion zone.The shale gas production capacity is subjected to the joint effects of the multiple parameters of the water invasion zone.Specifically,among the width,water saturation and permeability of the water invasion zone,the water invasion zone width has the largest effects on the 20-year cumulative gas production and water production time,while the intial gas production is most affected by the water saturation of the water invasion zone.The new model provides a theoretical basis and scientific basis for improving the accuracy of productivity prediction in deep shale gas wells.关键词
深层页岩气/气水两相/水侵层/流动模型/产能预测Key words
deep shale gas/gas-water two-phase/water invasion zone/flow model/production forecast分类
能源科技引用本文复制引用
王西凤,黄世军,赵凤兰,张娇娇..深层页岩气井气水两相产能预测[J].石油钻采工艺,2023,45(4):463-470,515,9.基金项目
国家自然科学基金"页岩储层条件下水对甲烷-二氧化碳竞争吸附的影响及相互作用机制研究"(编号:51974328) （编号:51974328）
国家自然科学基金"深层页岩气开发动态评价与数值模拟方法研究"(编号:U19B6003-03-05). （编号:U19B6003-03-05）
