引用本文:
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览次   下载 本文二维码信息
码上扫一扫!
分享到: 微信 更多
大斜度井砾石充填机理
董长银1,贾碧霞2,张迎春3,武龙1,邓珊1
(1.中国石油大学石油工程学院,山东东营257061;2.青海石油公司采油一厂,甘肃敦煌736202;3.胜利油田黄河钻井公司,山东东营257064)
摘要:
将大斜度井砾石充填过程分为3个阶段,分析了各阶段的充填机理。考虑携砂液向地层的滤失以及井筒环空、 冲筛环空之间的流体质量交换,分别建立了井筒环空、冲筛环空两个独立流动系统的砾石、携砂液的质量和动量守 恒方程,以及各系统间的流动耦合方程,得到了描述大斜度井砾石充填过程的数学模型。算例分析表明:由于井筒 滤失的存在,向井筒末端方向砂床高度逐步升高,其升高的速度随井筒滤失的增加而增加;在整个充填过程中,要保 持充填顺利进行,井筒内流动压力是不断增加的,尤其在第2个充填过程结束第3个充填过程开始后,流动压力会有 一个明显的增大以克服快速增加的流动阻力。
关键词:  大斜度井  砾石充填  数值模拟  数学模甩
DOI:
分类号:
基金项目:国家“863”计划项R (2006AA09Z351);国家自然科学基金项B (50704035)
Mechanism of gravel-packing in highly deviated wells
DONG Chang-yin1,JIA Bi-xia2,ZHANG Ying-chun3,WU Long1,DENG Shan1
(1. College of Petroleum Engineering in China University of Petroleum, Dongying 257061, China ;2. 1st Oil Production Plant, Qinghai Oilfield,Dunhuang 736202, China;3. Huanghe Drilling Company, Shengli Oilfield, Dongying 257064, China)
Abstract:
The process including three stages and mechanism of gravel-packing in highly deviated wells were analyzed. During the gravel-packing process, the packing is always together with the filtration of carrier fluid into the formation and the exchanging flow through the screen slots. Considering these characteristics, the mass and momentum conservation equations of gravel and fluid were established for two flow systems, that is,solid-fluid two phase flow in wellbore annular and single phase flow in wash pipe and screen annular. With the coupling equations of the two flow systems, the time-dependent mathematical model for highly deviated well gravel-packing was evolved. The results show that the sand bed height increases in the wellbore end direction because the filtration exists, and the up speed increases with the wellbore filtration increasing. In the whole packing process, the flowing pressure increases step by step. In order to finish the packing, especially the second packing stage ending and the third packing stage beginning, the flowing pressure will obviously increase to overcome the increased flowing resistance.
Key words:  highly deviated wells  grave]-packing  numerical simulation  mathematical model
版权所有 中国石油大学学报(自然科学版)编辑部 Copyright©2008 All Rights Reserved
主管单位:中华人民共和国教育部 主办单位:中国石油大学(华东)
地址: 青岛市黄岛区长江西路66号中国石油大学期刊社 邮编:266580 电话:0532-86983553 E-mail: journal@upc.edu.cn
本系统由:北京勤云科技发展有限公司设计