The Research Of Pipeline Corrosion And Pretection For Sulige Gasfield Water

With the exploitation of Sulige gas field,formation water will invade natural gas reservoirs and be taken out accompanied with natural gas The produced-water reinjection after simple handing not only reduce environment pollution but also save valued water resources.However,with the operation of produced-water treatment system.sewage treatment system often appears pipeline washout, equipment corrosion perforation,seriously affecting the normal operation of production, resulting in severe economic losses.This paper aims to the problems of wastewater treatment system in Sulige gasfield,Through alalyze the quality of produced-wate in Sulige gasfield,to determine the ionic composition and characteristics of produced-water,and do electron microscope scanning, energy spectrum analyzing and X-diffraction analysis for the pipeline corrosion products。By using weight-loss method of steel slice,the author study some factors that affect corrosion rate of 20 steel, and then put forward somelaws of the corrosion rate that is relate to temperature、Oxygen content、Cl-、PH、velocity of flow and vibration so on.Through the static hanging method to select sulige gas field produced water pipe, fungicides, corrosion inhibitors.On the basis of the application feasibility and economic perspective, do the pratical investigation, experimental research and theoretical analysis of the corrosion problems of Sulige gasfield, a special inhibition corrosion program has been selected.