气田开发对环境的影响

Influence of Gas Field Development on Environment

气田开采会对地层造成破坏，引起地面下沉甚至诱发地震灾害；钻井液会对土壤、农作物、地下水造成危害；井下作业废液会对周围环境造成污染；气田水会对农作物、水生生物、地下水、人体健康造成危害；含硫的天然气净化过程排出的二氧化硫对树木、人体健康造成危害，并形成酸雨，对环境造成更大的危害。本文以四川气田及国外油气田为实例对上述危害逐一论述，这些对油气田环境保护工作者有一定的借鉴作用。

Gas field exploitation will destroy strata,cause land surface subsidence and even induce earthquake disaster.The drilling fluid will harm soil，crops and underground water．The waste liquid from downhole operation will pollute the surroundings.The gas field water will endanger crops，aquatic organisms，underground water and human health．The sulfur dioxide discharged during the purification process of sulfur-bearing natural gas will cause damage to environment.Taking Sichuan gas fields and foreign oil-gas fields as examples this paper expounds the above-mentioned damage in detail so as to help the environmental protection workers of oil-gas fie1d draw on some experience from them．