Oversaturated Potassium Chloride Cement Slurry for Cementing Boreholes Penetrating Thick Salt and Gypsum Formations
-
摘要: 为提高巨厚盐膏层固井质量，解决固井过程中的盐溶问题，提出利用过饱和氯化钾溶液（相当于38%盐浓度氯化钾溶液）配制水泥浆，通过优选抗盐降失水剂CG80S、增强防窜剂GS12L以及非渗透剂BX-80等材料，构建了一套过饱和氯化钾水泥浆体系。室内对过饱和氯化钾水泥浆体系的物理性能、抗污染性能以及界面胶结性能进行了评价研究。实验结果表明，过饱和氯化钾固井水泥浆体系稠化时间以及失水量可控；68℃、24 h养护抗压强度大于15 MPa，混入5%的石膏、芒硝或页岩岩屑均不会对水泥浆的性能产生较大的影响，界面胶结实验显示该水泥浆能够显著提高水泥浆与盐岩地层的胶结质量，能够保障巨厚盐膏层一、二界面的胶结质量。Abstract: To improve the job quality of cementing the borehole penetrating thick salt and gypsum formations, an over-saturated potassium chloride solution (contains 38% KCl) was used in formulating a cement slurry, in an effort to avoid rock salt dissolution during well cementing. The over-saturated KCl cement slurry formulated was treated with a salt-resistant filter loss reducer CG80S, an enhanced anti-channeling agent GS12L, and a non-penetrating agent BX-80. Laboratory evaluation showed that the over-saturated KCl cement slurry had controllable thickening time and filter loss. The compressive strength of the set cement, after aging for 24 h at 68℃, was greater than 15 MPa. When contaminated by 5% gypsum, Glauber's salt or shale cuttings, the properties of the cement slurry did not change noticeably. Laboratory experiments also showed that the bond of the cement slurry and the salt formations improved remarkably, indicating that the quality of the bond between the cement sheath and the casing string, and the bond between the cement sheath and the formations can both be guaranteed.
-
陈良,彭博,黄敏. 聚合物氯化钾水泥浆体系性能评价及应用研究[J]. 长江大学学报(自然版),2015,12(25):14-16,57. CHEN Liang,PENG Bo,HUANG Min. Performance evaluation and application study of polymer potassium chloride cement slurry system[J]. Journal of Yangtze University(Natural Science Edition),2015,12(25):14-16,57. 周明明. 适用于巨厚盐膏层的高密度水泥浆体系研究[D]. 武汉:长江大学,2013. ZHOU Mingming. Research on high density cement slurry system apply to thick salt-gypsum[D].Wu Han:Yangtze University,2013. 彭雷,许明标. 盐膏层固井用抗温抗盐低滤失聚合物盐水水泥浆体系研究[J]. 石油天然气学报(江汉石油学院学报),2008,30(25):550-552. PENG Lei,XU Mingbiao. Study on the anti-temperature and salt-resistant low loss polymer salt water cement slurry system for cementing in Salt-gypsum[J]. Journal of Oil and Gas Technology,2008,30(25):550-552. 顾君. 含盐水泥浆体系的室内评价和现场试验[J]. 油田化学,2002,19(1):19-20. GU Jun. Laboratory evaluation and field trial uses of salt tolerant cementing slurry for high sal inity wells[J]. Oilfield Chemistry,2002,19(1):19-20. 侯殿波. 深井盐膏层固井水泥浆体系研究与应用[J]. 石油钻探技术,2004,32(3):18-19. HOU Dianbo. Research and applications of cement slurries for salt-gypsum beds in deep wells[J]. Petroleum Drilling Techniques,2004,32(3):18-19. 齐奉忠,袁进平.盐层固井技术探讨[J].西部探矿工程, 2005,10:58-60. QI Fengzhong,YUAN Jinping. Investigate of cementing technology in the salt bed[J]. West-china Exploration Engineering,2005,10:58-60. SIMÃO C A, MIRANDA C R, VARGAS A A, et al. Cementing in front of soluble salt zones[J]. SPE 145719, 2012. MUECKE,B N. Heated mud systems:a solution to squeezing-salt problems[J].SPE Drilling & Completion, SPE 25762-PA,1994, 9(4):276-280. HUNTER BILL,TAHMOURPOUR FARZAD,FAUL RONNIE. Cementing casing strings across salt zones:an overview of global best practices[J]. SPE 122079,2009. -
点击查看大图
计量
- 文章访问数: 701
- HTML全文浏览量: 177
- PDF下载量: 319
- 被引次数: 0
下载:
