大井斜下钻杆内砾石沉积量预测及应用实例  

Prediction of Gravel Deposits in Drill Pipes under High Inclination and Its Application Cases

作　　者：安文目 魏辉龙 王翊民 AN Wen-mu;WEI Hui-long;WANG Yi-min(CNOOC(China)Co.,Ltd.Tianjin Branch,Tianjin 300459,China)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300459

出　　处：《化工管理》2021年第32期194-195,198,共3页Chemical Engineering Management

摘　　要：在渤海油田的开发中大位移水平裸眼井逐步占据重要位置,因受大水垂比的影响,常规水平裸眼井砾石充填技术遇到了在砾石用量、充填时间、压力变化等方面模拟充填与实际充填存在差异的问题和反循环阶段返出砾石偏多的问题。为深入分析问题原因,实现对大位移水平裸眼井砾石充填的准确模拟,在砾石充填技术的研究基础上,考虑大水垂比带来的大井斜、长稳斜井段等因素,结合现场施工经验,实现了在大井斜下钻杆内砾石沉积量的准确预测,分析了影响砾石沉积量的各类参数及影响规律。该预测表明井斜越大、稳斜段越长、充填排量越低砾石沉积量越大,同时受携砂液性能和砾石性能影响。结合海上实例,进行了钻杆内砾石沉积量预测,对现场施工提出了指导性措施,对后续砾石充填技术发展提出了合理化建议。In the development of Bohai Oilfield,exploitation of extended-reach horizontal open-hole wells have gradually occupied an important position.Due to the influence of high ratio of horizontal departure and true vertical depth(Dep/TVD),the conventional horizontal open-hole gravel packing technology has encountered problems,which are perceived as the differences between filling simulation and practical application in gravel amount,filling time,pressure change etc,and the increase of gravel returned in reverse circulation stage.In order to deeply analyze the cause of the problem and make accurate simulation of gravel packing in extended-reach horizontal open-hole well,research of analyzing various parameters and influence laws that affect gravel deposit was conducted based on the study of gravel packing technology,considering factors such as high inclination,long section of holding angle caused by high ratio of(Dep/TVD),and on-site operation experience.The prediction shows that the higher well inclination,the longer section of holding angle,and the lower packing displacement,the greater amount of gravel deposited,and it is also affected by the performance of sand-carrying liquid and gravel.Combined with offshore examples,the prediction of gravel amount deposited in drill pipes was carried out,putting forward instructional measures and reasonable suggestions for on-site construction and subsequent development of gravel packing technology.

关 键 词：大位移井 水平裸眼井 完井 砾石充填 砾石沉积 模拟预测 

分 类 号：TE358.1[石油与天然气工程—油气田开发工程]