西南石油大学学报(自然科学版) ›› 2017, Vol. 39 ›› Issue (4): 145-151.DOI: 10.11885/j.issn.16745086.2015.08.20.01

• 石油与天然气工程 • 上一篇    下一篇

储气库井油套环空压力影响因素分析

王兆会1, 陈俊2, 何学良2, 尹宜勇1, 刘翀2   

  1. 1. 中国石油集团钻井工程技术研究院, 北京 昌平 102206;
    2. 中国石油北京天然气管道有限公司, 北京 朝阳 100101
  • 收稿日期:2015-08-20 修回日期:2017-05-14 出版日期:2017-08-01 发布日期:2017-08-01
  • 通讯作者: 王兆会,E-mail:wangzhaohuidri@cnpc.com.cn
  • 作者简介:王兆会,1962年生,男,汉族,山东费县人,教授级高级工程师,博士,主要从事石油天然气完井固井方面的研究。E-mail:wangzhaohuidri@cnpc.com.cn;陈俊,1966年生,男,汉族,江苏泰州人,高级工程师,博士,主要从事油气井及储气库方面研究和生产管理。E-mail:jchen66@sohu.com;何学良,1966年生,男,汉族,江苏泰兴人,高级工程师,主要从事储气库气藏相关技术方面的研究。E-mail:hexueliang@cnpc.com.cn;尹宜勇,1984年生,男,汉族,山东济宁人,工程师,博士,主要从事石油天然气完井固井方面的研究。E-mail:yinyydr@cnpc.com.cn;刘翀,1983年生,男,汉族,湖北孝感人,工程师,硕士,主要从事储气库气藏相关技术方面的研究。E-mail:cmg307@163.com
  • 基金资助:
    国家科技重大专项(2011ZX05021004);中国石油集团公司科学研究与技术开发项目(2014B33170501)

Analysis of Factors Influencing the Casing-tubing Annular Pressure of Gas Reservoir Wells

WANG Zhaohui1, CHEN Jun2, HE Xueliang2, YIN Yiyong1, LIU Chong2   

  1. 1. Drilling Research Institute, CNPC, Changping, Beijing 102206, China;
    2. Beijing Natural Gas Pipeline Co. Ltd., PetroChina, Chaoyang, Beijing 100101, China
  • Received:2015-08-20 Revised:2017-05-14 Online:2017-08-01 Published:2017-08-01

摘要: 针对储气库注采井密闭环空带压问题,开展了储气库注采井在生产管柱内温度、压力变化时,密闭环空压力计算模型的研究。首先,根据储气库现场实际简化井身结构,建立了密闭环空分析模型。其次,采用管柱弹性力学平面应变理论、物质的热胀冷缩性质及流体PVT状态方程,建立了数理解析模型。最后,根据某井的基础数据得出储气库注采井生产管柱内温度变化是形成密闭环空压力的主要影响因素这一认识;在只考虑温度、压力变化对保护液影响的情况下,可以满足现场工程要求,误差小于5%,计算结果与现场数据吻合较好。计算方法便于现场的环空压力快速预估。

关键词: 储气库, 注采井, 密闭环空, 环空压力, 环空带压

Abstract: Due to the problem of sustained casing pressure in the trapped annulus of gas reservoir injection-production wells, we develop a calculation model for sustained casing pressure under changing temperature and pressure of the production tubular column. An analysis model is first established for the trapped annulus according to a site-specific simplified structure of the actual gas reservoir. Next, based on the plane strain theory of elasticity, the thermal expansion and contraction properties of the material and the PVT equation of state for fluids, a mathematical analysis model is constructed. Finally, when the raw well data is considered, it is clear that the temperature change in the gas reservoir injection-production well is the main factor affecting the formation of the annular pressure. When only the effects of temperature and pressure on the protecting fluid are considered, this protocol meets the engineering requirements on site, with an error less than 5% and calculated results in good agreement with field data. This method facilitates the rapid prediction of annulus pressure in the field.

Key words: gas reservoir, injection-production wells, trapped annulus, annular pressure, sustained casing pressure

中图分类号: