大位移井套管磨损预测及防磨技术研究  

Casing Wear Prediction and Casing Protection Technology for Extended Reach Well

作　　者：杨春旭[1,2] 孙铭新 唐洪林 

机构地区：[1]中国石油大学(华东)石油工程学院 [2]胜利石油工程有限公司钻井工艺研究院

出　　处：《石油机械》2016年第1期5-9,共5页China Petroleum Machinery

基　　金：国家863计划项目"海上大位移井钻完井关键技术开发与集成"(2012AA091501)的部分研究成果

摘　　要：针对大位移井套管磨损问题,以White和Dawson提出的磨损效率理论模型为基础,建立了套管磨损预测模型。利用该模型定量地分析了井眼狗腿度、机械钻速、顶驱转速、底部钻具组合、套管钢级和钻井液性能对套管磨损的影响规律。分析结果表明,套管磨损深度随井眼狗腿度、顶驱转速、底部钻具组合外径的增大而增大,随机械钻速和钻井液密度的增大而减小。根据所计算的钻柱与套管之间接触力的分布情况,可对发生磨损的重点井段进行分析。综合以上分析结果,制订了相应的防磨措施,这些措施对现场施工具有一定的指导意义。To address the issue of casing wear in extended reach wells,the casing wear prediction model is established based on the wear efficiency theoretical model proposed by White and Dawson. On the basis of the prediction model,the effects of dogleg angle,ROP,top drive speed,bottomhole assembly,casing steel grade and drilling fluid performance on the casing wear could be quantitatively analyzed. The results show that the casing wear depth increases with the increase of dogleg angle,top drive speed,BHA diameter,but decreases with the increase of ROP and drilling fluid density. According to the distribution of the calculated contact force between the drill string and casing,critical well section under casing wear could be analyzed. Based on the above analysis,casing wear preventive measures have been developed to provide guides for on-site applications.

关 键 词：大位移井 套管磨损 接触力 预测模型 防磨措施 

分 类 号：TE243[石油与天然气工程—油气井工程]