摘要
为保证山东大中城市安全平稳供气,胜利油气区拟利用永21块废弃气藏建设地下储气库。由于该气藏已经水淹,注气过程中很难将含水饱和度降低到原始状态,因此气库运行过程中,必然存在气水两相渗流,并且随着运行周期的变化,含水饱和度不断变化,气井的产能也不断变化。利用已投产井的试气资料,建立了永21块无水条件下的气井产能方程,借鉴室内气驱水物模实验,建立了永21块气相相对渗透率与注采倍数的关系方程,通过修正产能方程中的相对渗透率值,建立了永21块不同运行周期的产能方程,解决了储气库带水气井产能的计算难题。
The underground gas storage will be constructed in Yong-21 block that is abandoned gas poor in Shengli oil-gas area for the purpose of working in domestic gas long-transmission pipe line network construction,meeting the demand for natural gas from Shandong region and ensuring the safe and steady gas supply for city and town of the region.At present,the gas pool reservoir of Yong-21 block has been watered out,it＇s difficult to restore to initial water saturation by gas injection process.Therefore gas-water two-phase flow exists during construction or operation of underground gas storage,and along with the change of operation cycle,the water saturation changes unceasingly,the gas well＇s deliverability can also unceasingly change.In this paper,the gas well＇s deliverability equation for Yong-21 block in condition of water free using the well test and production test data from old gas wells is presented.Based on the result of gas-water displacement physical simulation experiment study,the equation between gas relative permeability and injection-production multiple of Yong 21 block is presented.Through revision of gas relative permeability of the deliverability formula,the gas well＇s deliverability equations in different operation cycles are also given.These have solved the difficult problems of gas well＇s deliverability calculation in underground gas storage with water production.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2011年第1期71-73,共3页
Xinjiang Petroleum Geology
关键词
永安油田
枯竭气藏
水淹气藏
地下储气库
产能
Yong＇an oilfield
depleted gas reservoir
water flooded gas reservoir
underground gas storage
deliverability
