摘要
松辽盆地徐深气田火山岩气藏大规模投入开发以来,气井逐渐开始出水且具有不同的动态表现特征,因而建立一套适合该气田气井出水类型的划分方法和标准至关重要。首先,选取气井出水来源和出水通道两种静态因素,以及日产水量、日水气比、无水采气期3个动态因素,将气井出水类型定性划分为纵向水窜、水锥出水和高含水饱和度气层出水,再通过水流通道进一步划分为裂缝型纵向水窜和孔隙型纵向水锥出水;其次,应用日产水量与日水气比交会法、累积产水量与累积产气量交会法、累积水气比与累积生产天数交会法定量地划分为裂缝型纵向强水窜、裂缝型纵向弱水窜、孔隙型纵向水锥和高含水饱和度气层出水4种类型。应用结果表明,采用该方法和标准既可以定性又可以定量地划分徐深气田气井出水类型,弥补了其他方法单纯定性划分的不足,增强了定量划分的可操作性,对其他相同类型气田的出水类型划分具有参考价值。
Since the scale development of the volcanic gas reservoirs in the Xushen Gas Field,Songliao Basin,it has become a common phenomenon that gas wells there start to yield water with different features of dynamic behaviors.Thus,it is important to establish a set of classification methods and standards for these gas wells with water yields in this field.To begin with,by selecting two static factors,i.e.water source and water channel,together with three dynamic factors,i.e.daily water production,water-gas ratio,and water free production period,the watering out types of gas wells are classified qualitatively as vertical water breakthrough and coning from watering out of a high water saturation gas layer,which are further classified by the water channel as vertically fractured water breakthrough and porous water coning.Moreover,by using daily water production & water-gas ratio intersection method,cumulative water production & cumulative gas production intersection method,and cumulative water-gas ratio & cumulative production time intersection method,the watering out types of gas wells are classified quantitatively into four types: vertically fractured strong water breakthrough,fractured weak water breakthrough,porous water coning,and watering out of a high water saturation gas layer.Application results show that this set of methods and standards can classify the watering out types of gas wells qualitatively as well as quantitatively,which makes up the deficiency of the other qualitative methods and enhances the operability of the quantitative classification.This is of great value as reference for the classification of gas well's watering out types in other gas fields.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2010年第9期42-45,共4页
Natural Gas Industry
关键词
徐深气田
气井
出水类型
动态
静态
来源
通道
产水量
水气比
Xushen Gas Field,gas well,types of watering out,dynamic and static method,sources,channel,water production,water-gas ratio
