Special Oil & Gas Reservoirs ›› 2022, Vol. 29 ›› Issue (6): 1-10.DOI: 10.3969/j.issn.1006-6535.2022.06.001

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Research Progress and Prospect of Autogenic Acid System

Li Xiaogang1, Qin Yang1,2, Zhu Jingyi3, Liu Ziwei1,4, Jin Xinxiu2, Gao Chenxuan5, Jin Wenbo1, Du Bodi1   

  1. 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
    2. PetroChina Changqing Oilfield Company, Xi'an, Shaanxi 710018, China;
    3. Southwest Petroleum University, Chengdu, Sichuan 610500, China;
    4. PetroChina Tarim Oilfield Company, Korla, Xinjiang 841000;
    5. PetroChina Southwest Oil & Gasfield Company, Chengdu, Sichuan 610051
  • Received:2021-07-23 Revised:2022-07-29 Online:2022-12-25 Published:2023-01-10

Abstract: The authigenic acid acidizing technology is one of the main measures for stimulation high temperature (ultra-high temperature) and low permeability tight oil and gas reservoirs. The research progress of authigenic acid acidizing technology was comprehensively analyzed, and the acid-rock reaction characteristics of authigenic acid, the main acid-generating mechanism of authigenic acid, and the research progress of authigenic organic acid, authigenic hydrochloric acid, authigenic hydrofluoric acid and composite authigenic acids were introduced, the influence of the type of authigenic acid, hydrogen supply capacity, cost, retardation capability, corrosion inhibition capability and other factors on the field application of acidizing work fluid was analyzed, and the application of authigenic acid in acidizing operation was prospected. This study can provide a reference for the development, popularization and application of autogenic acid acidizing technology.

Key words: authigenic acid, retarded acid, deep acidizing, acid-rock reaction, acid-generating mechanism

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