Treatment of corrosion inhibitor in highly mineralized gas field water by advanced oxidation technology

Volume 7, Issue 2, April 2023     |     PP. 15-28      |     PDF (303 K)    |     Pub. Date: March 12, 2023
DOI: 10.54647/environmental610349    92 Downloads     83810 Views  

Author(s)

ZHANG Jinzhong, Southwest Branch of China Petroleum Engineering Company， Chengdu， Sichuan 610094, P R of China
FAN Xiangru, Chengdu University of Information Technology， Chengdu，Sichuan 610225, P R of China
LIAO Yun, Southwest Branch of China Petroleum Engineering Company， Chengdu， Sichuan 610094, P R of China
ZHANG Donghe, Chengdu University of Information Technology， Chengdu，Sichuan 610225, P R of China
YANG Yijin, Chengdu University of Information Technology， Chengdu，Sichuan 610225, P R of China

Abstract
With more and more oil and gas fields being exploited at home and abroad, serious corrosion problems have been caused to gathering and transportation pipelines, which has become a major problem affecting the safe production and transportation of oil and gas. Corrosion inhibitor is one of the most commonly used protection measures in oil and gas wells and gathering and transportation systems, which has the advantages of low investment, quick effect, simple equipment, and easy operation, and basically does not change the properties of related metal components and media. This paper studies the addition of a corrosion inhibitor (CPI-W) whose main component is fatty acid imidazoline to 8 representative simulated gas field waters, and then determines the COD value change range and the law of gas field wastewater, and selects three representative ones. The effective water treatment oxidant degrades the CPI-W corrosion inhibitor (concentration 1000ppm) in 8 kinds of gas field water. The results show that with the increase of CPI-W dosage, COD values of 8 kinds of gsd field water all increase rapidly. Three advanced oxidation technologies, such as sodium hypochlorite method, Fenton reagent method and potassium persulfate-ferrous sulfate method, can degrade CPI-W corrosion inhibitors in eight kinds of gas field water, and make the residual COD value in wastewater meet the secondary water standard in Integrated Wastewater Discharge Standard (GB8978-1996).

Keywords
Gas field water; Corrosion inhibitor; Advanced oxidation technology; Chemical oxygen demand (COD)

Cite this paper
ZHANG Jinzhong, FAN Xiangru, LIAO Yun, ZHANG Donghe, YANG Yijin, Treatment of corrosion inhibitor in highly mineralized gas field water by advanced oxidation technology , SCIREA Journal of Environment. Volume 7, Issue 2, April 2023 | PP. 15-28. 10.54647/environmental610349

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