Soil Environmental Impact Analysis On Soldification Treatment Of Drilling MUD

The continuous development and utilization of oil and natural gas resources in Sichuan region brings corresponding environmental pollution problems, of which the pollutants produced during drilling are of obvious, which will cause environmental pollution in case of non-proper treatment.The drilling mud is one of major pollutants produced in the drilling operation, containing a variety of chemical components and featuring different physicochemical properties. If it is directly discharged into the environment system, the environment will be seriously impacted. This paper will discuss the effect of drilling mud on drilling mud based on different treatment methods of drilling mud used at home and abroad and in combination with mature and common solidification treatment methods used in Sichuan region for drilling mud treatment.In this paper, five representative well sites are selected in natural gas exploitation area in Sichuan region for site investigation and sampling of solidified body and the leach liquid of the body is tested and monitored, and the mathematic model is established. After that, the sequence of edatope impact of leach liquids from five well sites is obtained by standardizing of quantitative data with analytic hierarchy process (AHP). Then, the edatope impact of solidification treatment of drilling mud and corresponding measures to be taken are finally analyzed by carrying out edatope quality monitoring at the well site(s) with poorer soil environmentThe test results show that all the leach liquids of solidified body from each well site meet Class I discharge standard regulated in the Integrated Wastewater Discharge Standard (GB8978-1996), except for unqualified pH value to different extents. Through AHP, it is verified that the Well Sites A and B have a more serious environment impact. However, they still meet the Class I standard regulated in the Environmental Quality Standard for Soils (GB15618-1995). Therefore, it is concluded that the edatope impact of solidification treatment of drilling mud is slight.