Research progress of corrosion inhibitors for high-temperature hydrochloric acid acidification

Author:

Li Nianyin1,He Jing1,Liu Pingli1,Zhang Qian2,Xiong Ying2,Zhang Xingde2,Wang Qiang1,Kang Yu2,Ma Chao3

Affiliation:

1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation , 74602 Southwest Petroleum University , Chengdu , 610500 , China

2. Research Institute of Natural Gas Technology , Petrochina Southwest Oil & Gasfield Company , Chengdu , 610213 , China

3. Hubei Key Laboratory of Oil and Gas Drilling and Production Engineering, College of Petroleum Engineering , 47897 Yangtze University , Hubei , 434023 , China

Abstract

Abstract As exploration and development to the ultra-deep layer continue to advance, bottom hole temperatures have gradually increased, aggravating acid corrosion of the downhole pipe string and greatly challenging the safety of reservoir reconstruction. Hydrochloric acid (HCl), an inorganic acid with strong acidity, is widely used in common acid systems in oil fields. Therefore, the prevention of corrosion by HCl under high temperature is an important task. In this study, we analyze the molecular structure, synergistic effect, and inhibition mechanism of imidazoline, Mannich base, quaternary ammonium salt, and other high-temperature HCl inhibitors and green inhibitors to explore the temperature resistance of inhibitors from the perspective of molecular microstructure and provide guidance for the development of ultra-high-temperature acidification inhibitors. Finally, the advantages and disadvantages of various HCl corrosion inhibitors are compared and summarized, and the knowledge gap and future research direction in the development field of high-temperature HCl corrosion inhibitors are pointed out.

Funder

the Science and Technology Cooperation Project of the CNPC-SWPU Innovation Alliance

the State Key Laboratory of Oil and Gas Reservoir Geology and Development Engineering

Publisher

Walter de Gruyter GmbH

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