钻井液与完井液2023，Vol.40Issue(6)：742-748,7.DOI:10.12358/j.issn.1001-5620.2023.06.007
有机缓释微乳酸解卡剂的制备及其性能影响因素
Preparation and Affecting Effects of a Slow-Releasing Organic Microemulsified Acid Pipe-Freeing Agent
摘要
Abstract
Drilling pipe-freeing agents presently in use have some problems that need to be solved,for example,the reaction rate of the pipe-freeing agents is too high which is easy to result in loss of the spotting fluids into formations and thus failures of the pipe-freeing operation.A slow-releasing organic microemulsified acid pipe-freeing agent has been developed to deal with this problem.Surfactants and acids were carefully selected to prepare the pipe-freeing agent.The optimized composition of the pipe-freeing agent is as follows:AQAS∶NP=2∶1,n-butanol∶n-octanol=1∶1,water phase∶oil phase=23∶77,secondary surfactant∶primary surfactant= 1∶3,and acetic acid∶hydrogen fluoric acid = 3∶1.The pipe-freeing agent is a water-in-oil(W/O)microemulsified acid,and the embedding rate of this pipe-freeing agent is 23%.Formation factors remarkably affecting the performance of the pipe-freeing agent is temperature.At high pressure high temperature,the release rate of the acid is increasing.Drilling fluid factors greatly affecting the performance of the pipe-freeing agent include weighting agent,clay and ultra-fine calcium carbonate.The microemulsified acid can completely lose its emulsion stability and turn into a suspension by the weighting agent,clay and ultra-fine calcium carbonate used in the drilling fluid.Field application of this pipe-freeing agent on five wells has shown that it can be used to free stuck pipes of many types such as pressure-differential pipe sticking,pipe sticking by settling drilled cuttings and bridging etc.,and the success rate of first try in freeing the stuck pipes is 100%.关键词
有机缓释/微乳酸/解卡剂/性能/影响因素Key words
Slow-releasing organic/Microemulsified acid/Pipe-freeing agent/Performance/Affecting factor分类
能源科技引用本文复制引用
陈明,蓝强,贾江鸿,黄维安,王雪晨,李秀灵..有机缓释微乳酸解卡剂的制备及其性能影响因素[J].钻井液与完井液,2023,40(6):742-748,7.基金项目
中石化工程公司课题"有机缓释酸解卡剂的研制与应用"(SG19-78K)和中石化课题"复合盐水微乳液研究与应用"(JP20004)部分研究内容. （SG19-78K）
