提高固井界面强度的钻井液研究与应用  

Research and Application of Drilling Fluid to Improve the Cement Bonding Interface Strength

作　　者：李家芬[1] 苏长明[1] 杨振杰[2] 宋本岭[3] 张进双[1] 

机构地区：[1]中国石油化工股份有限公司石油勘探开发研究院,北京100083 [2]西安石油大学石油工程学院,陕西西安710065 [3]胜利石油管理局渤海钻井总公司,山东东营257200

出　　处：《石油钻探技术》2007年第5期72-75,共4页Petroleum Drilling Techniques

基　　金：中国石油化工股份有限公司科研项目"固井双界面胶结强度强化机理及应用技术研究"(编号:P04070)部分成果

摘　　要：在钻井液中加入超细活性矿物和稳定井壁的材料能使固化体水化产物结构致密,固化体本体强度和界面胶结强度得到强化。在钻井液中加入特制活性矿物微晶,能使胶体中存在大量具有较高能量的自由表面,为泥饼水化反应提供有利的场所,降低水化成核反应的势垒,使水化反应充分均匀,固化体结构更加牢固,也就从根本上强化了界面胶结强度。通过室内研究,固化体第一界面的胶结强度提高30%以上,第二界面提高50%以上;现场4口井的应用表明,固井质量全为优质,平均井径扩大率小于4%。Abstract： Adding ultra fine activated mineral and well bore stability material into drilling fluid can make the structure of cement stone stronger and the intensity of cement-to formation interface higher. Adding special activated mineral microlith into drilling fluid will make abundant free surface with upper energy in the gel, provide favorable conditions for the hydrate reaction of mud cake and decrease the potential barrier of hydrate nucleation reaction, make the hydrate reaction evenly. At last it can consolidate the bonding interface intensity essentially. Through experimental studies, the first bonding interface strength can be improved by 30% and the second by 50%. The application results in 4 wells show that the quantities of all the four wells are excellent and the average well diameter enlargement rate is less then 4%.

关 键 词：活性矿物 钻井液 胶结强度 固井质量 

分 类 号：TE254.3[石油与天然气工程—油气井工程]