多羟基聚合物钻井液研制及应用  

DEVELOPMENT AND APPLICATION OF MULTI-HYDROXYL POLYMER DRILLING FLUID

作　　者：吕开河[1] 邱正松[1] 韩立国[2] 

机构地区：[1]石油大学石油工程学院 [2]胜利石油管理局塔里木钻井公司

出　　处：《钻采工艺》2006年第5期85-87,142,共3页Drilling & Production Technology

基　　金：中国石油天然气股份公司重点科技攻关项目(04B2091800)。

摘　　要：多羟基聚合物具有较高的羟基密度而且羟基是三维的和多方向的,这些特点加强了多羟基聚合物对页岩抑制作用。以多羟基聚合物为主剂,在对聚合物包被剂、防塌剂和降滤失剂进行优选实验的基础上,研制了多羟基聚合物钻井液。对该钻井液的抑制性、流变性、滤失造壁性、润滑性以及对油气层的保护性能进行了评价实验,分析了该钻井液的作用机理,并进行了现场试验。室内实验和现场应用表明,多羟基聚合物钻井液具有优良的防塌性、润滑性和滤失造壁性,能有效抑制粘土水化膨胀与分散,起到稳定井壁及保护油气层的作用,能满足复杂地质条件下钻井的需要。Multi-hydroxyl polymers have higher hydroxyl density, and are three-dimensional distribution. These characteristics strengthen the inhibiting action of multi-hydroxyl polymer on shale. Multi-hydroxyl polymer drilling fluid was developed based on optimum seeking experimental method of polymer encapsulating agents, anti-sloughing agent and fluid loss agent. The properties of the new drilling fluid system, including inhibition, rheological property, building capacity, lubrcating property and formation protection ability were evaluated in laboratory. The anti-sloughing mechanism of the drilling fluid was briefly analyzed. The experiment results and field tests indicated that multi-hydroxyl polymer drilling fluid has the advantages of excellent anti-sloughing property, lubrcating property and formation protection property, it can meet the requirements of drilling in complex geologic condition.

关 键 词：多羟基聚合物 钻井液 井壁稳定 油气层保护 现场应用 

分 类 号：TE254[石油与天然气工程—油气井工程]