无黏土水基钻井液用超支化聚合物降滤失剂的合成及性能评价
Synthesis and Performance Evaluation of Clay-free Water-based Drilling Fluid with Hyperbranched Polymer Filtrate Reducer
丁伟俊 1张颖 1余维初 2丁飞 3杨世楚 1蒲洪兵 4段文博5
作者信息
- 1. 长江大学化学与环境工程学院,湖北 荆州 434023;长江大学西部研究院,新疆 克拉玛依 834000
- 2. 长江大学化学与环境工程学院,湖北 荆州 434023;长江大学西部研究院,新疆 克拉玛依 834000;油气田清洁生产与污染物控制湖北省工程研究中心,湖北 荆州 434023
- 3. 长江大学化学与环境工程学院,湖北 荆州 434023
- 4. 中国石油长城钻探工程有限公司钻井液公司,辽宁 盘锦 124109
- 5. 中国石油西部钻探工程有限公司,新疆 克拉玛依 834000
- 折叠
摘要
在高温条件下,聚丙烯酰胺类降滤失剂分子易发生降解,导致降滤失效果大幅下降.为此,通过超支化单体季戊四醇三烯丙基醚(APE)与2-丙烯酰胺-2-甲基丙磺酸(AMPS)、丙烯酰胺(AM)、对苯乙烯磺酸钠(SSS)共聚合成了一种耐高温的超支化聚合物降滤失剂JHPAS,以JHPAS为基础配制了一种新型的无黏土水基钻井液,分析其降滤失机理,评价其在高温、高盐条件下的流变性能和降滤失性能.结果表明:JHPAS具有很好的热稳定性,在水溶液中可形成网络结构,在无黏土水基钻井液中吸附于超细CaCO3表面形成致密滤饼,并堵塞滤饼上的孔隙,进一步降低钻井液滤失量;构筑的无黏土水基钻井液在200 ℃老化16 h、饱和氯化钠盐水的条件下仍具有稳定的流变性和良好的降滤失性能,API滤失量和高温高压滤失量分别为5.5 mL和7.6 mL.研究成果有助于推动超支化聚合物在深层、超深层油藏钻井液中的研究与应用.
Abstract
Under high temperature conditions,the degradation of polyacrylamide filtrate reducer molecules leads to a significant decrease in filtrate reduction efficiency.To address this issue,a high temperature resistant hyperbranched polymer filtrate reducer(JHPAS)was synthesized through copolymerization of hyperbranched monomer allyl pentae-rythritol(APE)with 2-acrylamido-2-methylpropane sulfonic acid(AMPS),acrylamide(AM),and sodium styrene sulfonate(SSS).A novel clay-free water-based drilling fluid was formulated using JHPAS,and its filtrate reduction mechanism was analyzed.The rheological properties and filtrate performance under high temperature and high salt conditions were evaluated.The results demonstrate that JHPAS exhibits excellent thermal stability and has the abili-ty to create a network structure in an aqueous solution.It adsorbs onto the surface of superfine CaCO3,forming a compact filter cake in clay-free water-based drilling fluid,effectively plugging the pores on the filter cake and con-sequently reducing the filtrate loss of drilling fluid.The developed clay-free water-based drilling fluid maintains consistent rheological properties and demonstrates effective filtrate loss reduction even after exposure to 200℃aging for 16 hours and saturated sodium chloride brine.The API filtrate loss and high-temperature,high-pressure filtrate loss are measured at 5.5 mL and 7.6 mL,respectively.These research findings contribute to advancing the explora-tion and utilization of hyperbranched polymers in drilling fluids for in deep and ultra-deep reservoirs.
关键词
水基钻井液/降滤失剂/超支化聚合物/高温储层/高盐/深层/超深层Key words
water-based drilling fluid/filtrate reducer/hyperbranched polymers/high temperature reservoir/high salt/deep reservoir/ultra-deep reservoir引用本文复制引用
基金项目
国家自然科学基金(52274029)
新疆克拉玛依市创新环境建设计划(创新人才)项目(20222023hjcxrc0007)
出版年
2024
国家科技期刊平台
NSTL
万方数据