钻井液与完井液2017，Vol.34Issue(2)：26-32,7.DOI:10.3969/j.issn.1001-5620.2017.02.005
水性丙烯酸树脂在油包水钻井液中的作用
Application of Aqueous Acrylic Resin in Invert Emulsion Drilling Fluids
摘要
Abstract
Asphaltene and humic acid products widely used in oil base muds (OBMs) have deficiencies such as seriously viscosifying the OBMs, high concentration requirement, limited filtration control performance and poor high temperature stability. An aqueous acrylic resin, WAR, was developed for use in OBMs to solve these deficiencies. WAR was synthesized with monomers such as styrene, butyl acrylate, and acrylic acid through emulsion polymerization, and was characterized with IR spectrometry. WAR remained stable at 237 ℃ (weight loss by 2%), as proved by thermogravimetric analysis. WAR was evaluated in laboratory for its emulsion stability, rheology, filtration control performance, plugging capacity and high temperature stability both in conventional OBMs and clay-free OBMs. It was shown that WAR performed positively in stabilizing the properties of emulsions. Emulsions treated with WAR remained their whole emulsibility after 24 h of standing. WAR had very slight effect on the rheology of OBMs, and appreciable filtration control ability, plugging capacity and high temperature stability. HTHP filter loss tested at 180 ℃ was less than 5 mL, with the mud cake being dense. After aging at 180 ℃ for 16 h, the percentage of forward plugging was more than 75%, and that of backward plugging was moer than 70%. Compared with oxidized asphalt, the aqueous acrylic resin had better overall performance as an OBM additive. The working mechanism of the aqueous acrylic resin in invert emulsion drilling fluids is also analyzed in this paper.关键词
降滤失剂/油基钻井液/水性丙烯酸树脂/乳液稳定Key words
Aqueous acrylic resin/Acrylic resin/Additive for oil base mud/Emulsion stabilization/Filter loss reducer分类
能源科技引用本文复制引用
黄贤斌,蒋官澄,邓正强..水性丙烯酸树脂在油包水钻井液中的作用[J].钻井液与完井液,2017,34(2):26-32,7.基金项目
国家自然科学创新研究群体项目"复杂油气井钻井与完井基础研究"(51221003) （51221003）
国家"863"项目"海上大位移井水平井钻井液关键技术研究"(2012AA091502) （2012AA091502）
国家"863"项目"致密气藏高效钻井技术研究"(2013AA064803) （2013AA064803）
国家自然科学石油化工联合基金重点支持项目"页岩气钻探中的井壁稳定及高效钻完井基础研究"(U1262201). （U1262201）
