双网络吸水树脂堵漏剂的研制  

Development of A Dual Texture Resin Sealing Agent for Plugging Lost Circulation

作　　者：赖小林[1,2] 王中华[1] 邓华江 郭建华[1] 姜雪清[1] 刘文堂[1] 

机构地区：[1]中国石化中原石油勘探局钻井工程技术研究院,河南濮阳457001 [2]新疆维吾尔自治区安全科学技术研究院,新疆乌鲁木齐830002

出　　处：《石油钻探技术》2011年第4期29-33,共5页Petroleum Drilling Techniques

基　　金：中国石化中原石油勘探局重大科技攻关项目"新型抗高温延迟膨胀堵漏剂研究"(编号:2009319)部分研究成果

摘　　要：针对高温地层堵漏作业中现有吸水树脂堵漏剂抗温能力不够、强度不足等问题,研制了双网络吸水树脂堵漏剂DNG。DNG具有"刚柔相济"的双网络结构,强度和抗温性能得到很大提高,形变95%时的抗压强度达到16.2 MPa,释压后能快速回弹并保持完整的形态;150℃高温条件下老化30 d后依然保持完整的形态和较好的强度;吸水倍数为4～10倍,且具有较好的抗盐和耐pH敏感性能。评价了DNG的堵漏性能,得到了DNG封堵大中型漏失的优化配方,并探讨了其堵漏机理,DNG之所以能够成功封堵漏层在于其具有较好的变形填充、吸附缠绕、吸水膨胀等性能。For the problem of insufficient strength and insufficient resistance to high temperature existing in conventional water absorbent resin,a water absorbing resin DNG with dual texture for plugging lost circulation was developed. It has both hardness and softness, and good thermal stability. DNG＇s compression strength can reach to 16.2 MPa with 95% deformation,and it can quickly rebound after pressure release and maintain the form integrity. Aging for 30 days under 150 ℃ ,it still maintains the shape integrity and good strength. Water absorbing capacity is 4-10 times of its original volume. It has good salt resistant performance and pH tolerance. Laboratory tests showed that DNG is effective in plugging lost circulation. Formulas for plugging small to large sized lost circulation were obtained. The plugging mechanism was discussed. The success of DNG lies in its deformation filling, adsorption wrapping, absorbing water and expansion, etc.

关 键 词：合成树脂 堵漏剂 堵漏机理 抗压强度 

分 类 号：TE28[石油与天然气工程—油气井工程]