钻井液与完井液2025，Vol.42Issue(6)：728-737,10.DOI:10.12358/j.issn.1001-5620.2025.06.004
油基钻完井液用抗超高温悬浮稳定剂HPAS及其作用机理
Ultra-High Temperature Suspension Stabilizer HPAS for Oil-Based Drilling and Completion Fluids and Its Working Mechanism
摘要
Abstract
Oil-based drilling and completion fluids presently in use have poor suspension stability at high temperatures up to 240℃or higher.To deal with this problem,a strongly hydrophobic suspension stabilizer HPAS was developed based on the principle of strengthening the stability of a colloidal system through spatial grid structure.HPAS was synthesized using sepiolite fiber and n-octyltriethoxysilane as the raw materials.The final product was obtained by treating the intermediate product with hydrochloric acid and then organic modification.Characterization of HPAS with IR,TGA,particle size analysis and surface wettability proved that the modification is successful.A high-density oil-based drilling fluid was formulated with HPAS.After aging at 260℃,the properties of the drilling fluid were still good,the AV and PV of the drilling fluid were about 33 mPa·s and 27 mPa·s,respectively,the YP of the drilling fluid was at least 4 Pa,the electric stability was higher than 800 V,the HTHP filter loss was kept under 5 mL,and the thickness of the mud cake was less than 2 mm.Evaluation of the sedimentation stability of the drilling fluid showed that after standing at 240℃for 7 d there was no hard sedimentation found,and a glass rod can freely drop through the drilling fluid to the bottom of the mud container.Moreover,the YP of the drilling fluid remained at more than 4.5 MPa at temperatures between 65℃and 240℃and pressures between atmospheric pressure and 190 MPa,indicating that the drilling fluid can maintain good suspension stability and solids carrying performance under these conditions.The development of this drilling fluid provides a technical support for the use of oil-based drilling and completion fluids in drilling deep,ultra-deep wells and even wells of ten thousand meters in depths.关键词
油基钻完井液/抗超高温/悬浮稳定剂/悬浮稳定性/携岩能力Key words
Oil-based drilling and completion fluids/Ultra-high temperature resistant/Suspension stabilizer/Suspension stability/Drilled solids carrying capacity分类
能源科技引用本文复制引用
寇亚浩,倪晓骁,王建华,张家旗,尹达,迟军..油基钻完井液用抗超高温悬浮稳定剂HPAS及其作用机理[J].钻井液与完井液,2025,42(6):728-737,10.基金项目
中国石油集团青年科技专项"超支化聚合物调控油基钻井液流变特性及作用机理研究"(2024DQ03107) （2024DQ03107）
中国石油集团关键核心技术攻关项目"钻井废弃物资源化利用关键技术及装置研究"(2025ZG73) （2025ZG73）
中国石油集团工程技术研究院创新基金项目"抗280℃油基钻井液核心处理剂前期研究"(CPET202402). （CPET202402）
