川东地区气田水水质特性研究

Study on the Characteristics of Gas Field Water Quality in Eastern Sichuan

气田水是天然气开采过程中采出的地层水,因其来源广泛、类型多以及成分复杂,导致难达标处理且易对土壤、地表水以及地下水造成环境污染。文章以川东地区气田水为研究对象,通过常规水质测定和气相色谱-质谱联用(GC-MS)检测等方法对其进行全面分析,结果表明:川东地区气田水的特征污染物为氯化物、COD、SS、阴离子表面活性剂以及硫化物等物质;根据其水质特性可以将川东地区气田水分为两类,一类是高矿化度、高含有机物气田水,另一类是高含硫、高含有机物气田水;川东地区气田水中共有17种有机污染物,主要为烷烃类、醇类、酯类以及少量酸类等物质。

Gas field water is the formation water produced with natural gas in the process of natural gas exploitation.Treatment of the gas field water is difficult to meet the standard due to its wide source,numerous types and complex composition;in addition,it can easily pollute the soil,surface water and groundwater.This article took the gas field water in the Eastern Sichuan region as the research object,carried out comprehensive analysis by routine water quality determination,GC-MS and other means.The results showed that the characteristic pollutants of gas field water in the Eastern Sichuan region were chloride,COD,SS,anionic surfactant,sulfide and other substances.According to the characteristics of water quality,gas field water could be divided into two types,one was high salinity,high organic gas field water and the other was high sulfur,high organic gas field water.There were 17 kinds of organic pollutants in the gas field water in the Eastern Sichuan region,mainly including alkanes,alcohols,ester sand and a small number of acids.