苏东气田气井出水水源快速识别方法研究

Water Source Rapid Identifying Method for Gas Wells in Sudong Gas Field

水源识别是认识气藏气水活动规律、调整合理生产制度、制定相应治水措施的关键。苏里格特低渗气田实施整体压裂改造,裂缝交错分布,出水气井数量大,气井产水异常。在缺乏生产测井资料条件下,应用传统方法难以准确、快速地判断水源类型,造成治水措施选择不准、大量气井暴性出水甚至停产。通过对大量气井的生产动态数据进行挖掘,优选出多个典型井组的气井进行水体能量、水侵量及水体活跃程度综合性评价,并对不同出水类型气井的日产曲线、水气比等7项参数进行筛选、分类、统计,结合现场专家意见,制定了针对苏东气田的水源识别标准,建立了一套快速水源识别方法。现场应用表明,在缺乏生产测井资料的情况下,利用该标准能够方便、快捷、有效地指导识别苏东气井的水源类型。

Water source identification was the key point of identifying the gas-water activity regulation in gas reservoirs,adjusting proper production system and setting up corresponding measurements for water control.In Sulige Gas Field,fracturing reconstruction was implemented in the extra-low-permeability gas field where fracture distribution was disorder,the number of water-out wells was quite a lot and water production was abnormal.Without the Production logging data,the traditional way was hard to figure out the types of water sources both accurately and quickly,which would induce an incorrect selection of regulation of water control and sudden water-out in a large number of gas wells or even shut down.By the mining quantities of production performance data in gas wells,an integralpreference evaluation was given to many typical well groups judging the water body energy,water influx and the active degree of water itself,7parameters such as daily production curve and water-gas ratio and etc were chosen for sorting and statistics in different types of water producing wells,and in combination with experts'suggestions,the criteria for water source identification and a set of rapid water identifying methods were established in Sulige Gas Field.Field application indicates that without production logging data,the methods can be used for a rapid,convenient and effective guiding the identification of water source types in Sudong Gas Field.