泥饼固化提高固井二界面胶结强度的微观分析  

Microstructure Analysis of Improving the Bond Strength at Cement-Formation Interface by Mud Cake Solidification

作　　者：张宇[1] 田旭[2] 张辉[3] 张鹏伟[2] 肖武峰[1] 顾军[3] 

机构地区：[1]中国石化河南油田分公司石油工程技术研究院,河南南阳473132 [2]中国石化河南石油勘探局钻井工程公司,河南南阳473132 [3]中国地质大学资源学院,湖北武汉430074

出　　处：《油田化学》2012年第2期146-150,共5页Oilfield Chemistry

基　　金：国家自然科学基金项目"钻井液/水泥浆不变条件下固井二界面泥饼固化机理与界面交联机制"(项目编号51174180)和"煤层气井内隔层界面抗剪切强度弱化效应与预测模型研究"(项目编号40972103)

摘　　要：采用XRD、ESEM-EDX和TG-DSC测试分析方法,对泥饼固化提高固井二界面胶结强度的机理进行了研究。结果表明,泥饼固化法制备的固井二界面凝饼中生成了水化硅酸钙(C-S-H)凝胶和沸石类凝胶。它们是由泥饼改性剂中的活性物质、黏土矿物被溶蚀析出的活性物质、水泥水化产生的水化离子和凝饼形成剂共同作用形成的。这些胶凝物质填充在黏土矿物和钻井岩屑之间,并将之粘接在一起,相互胶结形成了连续相,实现了固井二界面的整体固化胶结。Based on modern test and analysis technology（ XRD, ESEM-EDX and TG-DSC）, the improving mechanism of bond strength at cement-formation interface by mud cake solidification was studied. The results showed that C-S-H gel and zeolites gel generated in the mud cake connected clay minerals and driRing cuttings and filled the gap. The C-S-H gel and zeolites gel were generated by interaction of active substances from mud cake modifier and clay minerals, ions produced by cement hydration and coagulated cake forming agent. The gels cemented to be a continuous phase and then achieved integrate solidification and cementation of cement formation interface.

关 键 词：固井二界面 泥饼固化法 固化胶结 凝胶 南阳双江油田 

分 类 号：TE256.6[石油与天然气工程—油气井工程]