低渗致密砂岩气藏井筒流态判识及积液井措施管理

Identification of gas wellbore flow pattern and management of liquid-accumulation wells in low permeability tight sandstone gas reservoirs

低渗致密砂岩气藏由于其"三低"特性,产水对该类气藏生产影响十分严重,准确判识气井积液是气田气井精细管理的重要内容。通过对产水气井井筒内气液两相分布状态的深入剖析,结合实际积液井压力测试数据,建立了井筒流态与气井流压、产气量之间的关系,并根据积液井井筒流态及排水采气措施适用性对积液井管理提出了优化建议,有效支撑了低渗致密砂岩气藏气井精细化管理,进一步促进了气田高效、可持续开发。

Because of the "three low" characteristics of low permeability tight sandstone gas reservoirs, water production has a serious impact on the production of such gas reservoirs.Accurate identification of wellbore accumulation is an important part of fine management of wells in gasfields. Through in-depth analysis of the gas-liquid two-phase distribution in the wellbore of water-producing gas wells and combined with the actual pressure test data of liquid-accumulating wells, the relationship between wellbore flow pattern and flow pressure and gas production is established. Based on the flow pattern of liquid-accumulating wells and the applicability of drainage gas recovery measures, the optimization suggestions are put forward, which effectively support the management of liquid-accumulating wells.The fine management of gas wells in low permeability tight sandstone gas reservoirs further promotes the efficient and sustainable development of gasfields.