油田压裂返排液对区域水文地质环境的影响研究  

Influence of Oilfield Fracturing Flowback Fluid on Regional Hydrogeological Environment

作　　者：周旭波[1] Zhou Xubo(Xinjiang Oilfield Company Fengcheng Oilfield Operation Area,Karamay 834000,China)

机构地区：[1]新疆油田公司风城油田作业区,新疆克拉玛依834000

出　　处：《环境科学与管理》2021年第12期67-71,共5页Environmental Science and Management

摘　　要：油田压裂返排液内包含大量有害固体悬浮物与石油类污染物,将压裂返排液作为幂律流体,根据幂律流体达西定律公式计算压裂返排液流动情况,设定流动交界面持续性条件,掌握压裂返排液渗透流动机理;采用PHREEQC软件模拟压裂返排液渗漏过程中,与地下水、土壤之间的化学变化,得到以下结论:胍胶压裂返排液的污染程度最高,返排液渗入包气带后,受到水体阳离子交换及过滤作用,产生水岩反应,导致Cl^(-)、Na^(+)含量明显升高,对地面植被与水环境具有非常不利的负面影响。Oilfield fracturing flowback fluid contains a large number of harmful solid suspensions and petroleum pollutants.Take the fracturing flowback fluid as a power-law fluid,this paper calculates the flow of fracturing flowback fluid according to the formula of Darcy's law of power-law fluid.It sets the continuity conditions of flow interface,and master the permeability flow mechanism of fracturing flowback fluid.PHREEQC software is used to simulate the chemical changes between fracturing flowback fluid and groundwater and soil during the leakage process.It is concluded that the pollution degree of guanidine gum fracturing flowback fluid is the highest.After the flowback fluid penetrates into the aeration zone,it is subject to cation exchange and filtration of water body,resulting in water rock reaction and obvious increase of Cl^(-) and Na^(+).It has a very negative impact on ground vegetation and water environment.

关 键 词：油田压裂返排液 水文地质环境 环境污染 油田开采 生态反应 

分 类 号：X542[环境科学与工程—环境工程]