甲基硅酸盐抑制粘土水化性能及机理  

Inhibition of Clay Hydration by Methylsiliconate

作　　者：韩炜超 李颖 谭现锋 郭明义[1] 徐会文[1] HAN Wei-chao;LI Ying;TAN Xian-feng;GUO Ming-yi;XU Hui-wen(College of Construction Engineering,Jilin University,Changchun Jinlin 130026,China;Shandong Lunan Geology Engineering Investigation Institute,Jining Shandong 272100,China)

机构地区：[1]吉林大学建设工程学院,吉林长春130026 [2]山东省鲁南地质工程勘察院,山东济宁272100

出　　处：《探矿工程（岩土钻掘工程）》2018年第11期19-23,共5页Exploration Engineering:Rock & Soil Drilling and Tunneling

基　　金：吉林省省校共建计划专项"深部地热资源(含干热岩)勘查与开发利用"(编号:SXGJSF2017-5);山东省地矿局地质科技攻关项目"页岩气钻探用高效低阻仿生钻进取样技术研究"(编号:KY201506);中国博士后基金项目"新型纳米碳材料在高温钻井液体系中应用"(编号:2013M530983)

摘　　要：泥页岩水化分散是引起钻孔孔壁失稳,导致缩径、掉块、坍塌等孔内事故的主要原因,泥页岩抑制剂一直是复杂地层钻进技术研究的热点。通过对甲基硅酸钾、甲基硅酸钠、氯化钾、硅酸钠、硅酸钾5种抑制剂对粘土沉降稳定性、水化膨胀及造浆效果等性能测试,结果表明甲基硅酸盐具有良好抑制性;通过红外光谱、X射线衍射、水接触角和光学显微镜对甲基硅酸钾的抑制性作用机理进行了探讨。明确了钾离子的抑制性与表面疏水膜结构协同是甲基硅酸钾抑制粘土水化和防塌作用的原因。The shale hydration and dispersion is the major cause of wellbore instability,often leading to contraction,stuck pipes and borehole collapse.Four inhibitors:sodium methylsiliconate,potassium chloride,sodium silicate and potassium silicate,have been tested for clay settlement,hydration and expansion,and linear swelling.The results show potassium methylsiliconate exhibited better shale inhibition.The shale inhibition mechanism of potassium methyl-silicate was investigated by infrared spectroscopy,X ray diffraction,water-contact angle and optical microscope,demonstrating that the excellent inhibition and collapse prevention performance of potassium methylsiliconate is attributable to the synergistic effect of the potassium cation and hydrophobic membrane structure formed on the surface by methylsiliconate anions.

关 键 词：钻井液 甲基硅酸钾 疏水膜 协同作用 

分 类 号：P634.6[天文地球—地质矿产勘探]