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| 环保型烷基糖苷季铵盐抑制剂制备及作用机制 |
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黄熠1,李中1,颜帮川1,李贺2,吕开河2,孙金声2,戴彩丽2,蒋官澄3
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(1.中海石油(中国)有限公司湛江分公司,广东湛江 524057;2.中国石油大学(华东)石油工程学院,山东青岛 266580;3.中国石油大学(北京)石油工程学院,北京 102249)
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| 摘要: |
| 针对非离子表面活性剂烷基糖苷(APG)用作水基钻井液抑制剂时加量大、成本高等问题,通过醚化反应在APG分子中引入季铵阳离子,合成烷基糖苷季铵盐页岩抑制剂(APGS)。通过浸泡实验、线性膨胀实验、页岩滚动回收实验对其抑制性能进行评价,通过发光细菌法和生物耗氧量法对其毒性及生物降解性进行评价,通过表面张力实验、粒度分析、吸附试验以及红外光谱分析对其抑制机制进行分析。结果表明:APGS抑制黏土水化分散性能优于聚胺和氯化钾;对于易分散钻屑,质量分数为2％ APGS岩屑的滚动回收率达73.8％,抑制分散效果明显优于聚胺及APG;APGS与钻井液配伍性好,具有一定的降黏和降滤失作用,无毒,易生物降解。APGS通过中和黏土负电荷,压缩晶层间距,抑制黏土水化分散;通过静电引力和氢键的共同作用,吸附于黏土表面,形成致密的吸附层,阻止水与黏土作用;质量分数为1％ APGS水溶液表面张力为29 mN/m,能有效降低毛细管作用力,阻止水侵入地层。 |
| 关键词: 烷基糖苷 季铵盐 页岩抑制剂 抑制机制 井壁稳定 |
| DOI：10.3969/j.issn.1673-5005.2020.04.015 |
| 分类号::TE 254.3 |
| 文献标识码:A |
| 基金项目:中国海油集团公司“十三五”科技重大项目(CNOOC-KJ 135 ZDXM 05 LTD ZJ 03);国家自然科学基金石油化工联合基金(A类)重点基金项目(U1762212) |
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| Synthesis of shale inhibitor of alkyl glycoside quaternary ammonium salt and its action mechanism |
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HUANG Yi1, LI Zhong1, YAN Bangchuan1, LI He2, LÜ Kaihe2, SUN Jinsheng2, DAI Caili2, JIANG Guancheng3
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(1.Zhanjiang Branch of CNOOC (China) Company Limited, Zhanjiang 524057, China;2.School of Petroleum Engineering in China University of Petroleum(East China), Qingdao 266580, China;3.College of Petroleum Engineering in China University of Petroleum(Beijing), Beijing 102249, China)
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| Abstract: |
| Aiming at the problems of large dosage and high cost of non-ionic surfactant alkyl glycoside (APG) used as water-based drilling fluid inhibitors, shale inhibitor of alkyl glycoside quaternary ammonium salt (APGS) was synthesized by introducing quaternary ammonium cations into APG molecules through etherification reaction. The inhibition performance was evaluated by immersion experiment, linear expansion experiment and shale rolling recovery experiment. The toxicity and biodegradability of APGS were evaluated by luminescent bacteria method and biological oxygen demand method, respectively. The inhibition mechanism was investigated by surface tension test, particle size analysis, adsorption test and infrared spectrum analysis. The results show that APGS effectively inhibits the hydration and dispersion of clay, and its performance is better than that of polyamine and potassium chloride. For easily dispersing drill cuttings, the rolling recovery rate of 2% APGS is 73.8%, which is higher than that of polyamine and APG. APGS has a good compatibility with drilling fluid, which has little effect on the rheological properties of the drilling fluid and can reduce fluid loss to a certain degree. Besides, APGS is nontoxic and easily biodegradable. It is found that APGS can neutralize the negative charges of clay and compress the spacing of the crystal layer, inhibiting the hydration and dispersion of clay. APGS could adsorb on the surface of clay to form a dense adsorption layerby the electrostatic attraction and hydrogen bonding, preventing water interaction with clay. The surface tension can be greatly reduced.And the surface tension of 1% APGS aqueous solution is 29 mN/m, preventing water invasion into the formation by reducing the capillary force. |
| Key words: alkyl glycoside quaternary ammonium salt shale inhibitor inhibition mechanism wellbore stability |
