钻井液与完井液2018，Vol.35Issue(2)：35-39,5.DOI:10.3969/j.issn.1001-5620.2018.02.005
抗超高温高密度油基钻井液用新型降黏剂的性能
Study on the Performance of New Ultra-high Temperature High Density Oil Base Mud Thinners
摘要
Abstract
Three thinners, A, B and C have been synthesized to deal with extra viscosity of high temperature high density oil base drilling fluids. Thinner A, a condensation polymerized fatty acid, was obtained by copolymerizing one or more raw materials such as dodecahydroxyl stearic acid, polyhydroxy stearic acid, stearic acid, and the homopolymer of the product of dodecahydroxyl stearic acid and stearic acid with stearic acid. Thinner B was obtained by reacting the product of fatty acid or fat and polyamine at 100 ℃-200 ℃ with maleic acid and maleic acid anhydride at 80 ℃-150 ℃, and then dispersed the product with 40％ oleyl alcohol, fatty acid or condensation polymerized fatty acid. Thinner C was a derivative from the reaction product of condensation polymerized fatty acid, alcohol amine and polyamine. The working mechanisms of these thinners are discussed in this paper. Added poor quality clay to contaminate or added barite to weight a high density (2.2 g/cm3) oil base mud to 2.4 g/cm3, then treated the weighted mud with three thinners to test their ability to reduce viscosity. It was found that the thinner A and the thinner C both were able to control the rheology of mud caused by the addition of poor quality clays within predetermined range, and the oil base mud can thus be reused for many more times, thereby reducing mud cost. The thinner B was able to reduce mud viscosity caused by the addition of barite, hence the pump pressure. The thinner B has thinning efficiency of 77％, and functions properly at 225 ℃.关键词
高密度油基钻井液/超高温/降黏剂/热稳定性/流变性能/降黏效率Key words
High density oil base drilling fluid/Ultra-high temperature/Thinner/Thermal stability/Rheology/Thinning efficiency分类
能源科技引用本文复制引用
杨振周,刘付臣,周春,李建成,杨鹏,燕松兵..抗超高温高密度油基钻井液用新型降黏剂的性能[J].钻井液与完井液,2018,35(2):35-39,5.基金项目
国家科技重大专项课题"深井超深井优质钻井液与固井完井技术研究"(2016ZX05020-004),中国石油天然气集团公司重大科技专项"高温高密度钻井液与可排放海水基钻井液成套技术研发"(2013E-3802). （2016ZX05020-004）
