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1前言为了节约开发成本,塔里木油田公司对三超气井的开发采用的是射孔-酸化-完井一体化工艺,这就对完井管柱的各项性能提出了较高的要求,而其中完井管柱的抗腐蚀性能是保证井筒完整性的首要前提。本研究组对入井和产出流体的情况进行了调研,发现完井管柱的腐蚀主要在酸化和返排残酸萌生,并在采出水期间继续发展。为此,在实验室中模拟了实际工况下的作业环境,深入研究经过酸化、返
1 Preface In order to save the development cost, Tarim Oilfield Company developed the integrated perforation-acidification-completion process for the development of the three gas wells, which put forward higher requirements on the performance of the completion string. Among them, Corrosion resistance of completion string is the most important prerequisite to ensure wellbore integrity. The research team investigated the conditions of the well and the produced fluid and found that the corrosion of the completion string mainly occurred during acidification and return acid residues and continued to develop during the production of water. To this end, in the laboratory simulation of the actual working conditions of the operating conditions, in-depth study after acidification, back