靖边气田气井产水成因综合判断方法

A COMPREHENSIVE ESTIMATION METHOD ON THE ORIGIN OF WATER PRODUCED IN GAS WELLS OF JINGBIAN GAS FIELD

在气井生产过程中,由于天然气压力和温度的降低,水蒸气会凝析成液态水。对于低水气比井而言,如何辨别凝析水和地层水一直是个难题。为此,提出了一种综合判断气井出水成因的方法:①根据凝析水的化学特征;②基于Mcketta-Wehe算图估算凝析水量。最后,以靖边气田的实际生产井为例说明了如何应用该方法。这对于正确判断气井出水成因、从而选择相应的开采工艺非常重要。

During the process of gas production in gas wells,vapor will condensate into liquid water due to the cut down of pressure and temperature of natural gas.How to identify condensed water and formation water is always a bothering problem as for those low-content water gas wells.Therefore,to solve this problem this paper introduced a comprehensive method to assess on the cause of the formation of the water produced from gas wells.In this method,firstly to make it clear how condensed water came into being from natural gas,then to analyze chemical features about the condensed water,and finally to calculate the content of condensed water based on the MckettaWehe Method.This paper introduced how this comprehend method was actually used in a gas-production well in the Jingbian Gas Field.Field practices show that this method can judge accurately how the water forms in gas wells,and then will be helpful further in choosing the corresponding recovery and production technology.