深水动态压井钻井井筒压力模拟

doi:10.7623/syxb201502013

石油学报 ›› 2015, Vol. 36 ›› Issue (2): 232-237.DOI: 10.7623/syxb201502013

深水动态压井钻井井筒压力模拟

付建红¹, 冯剑¹, 陈平¹, 韦红术², 刘正礼²

1. 西南石油大学油气藏地质及开发工程国家重点实验室四川成都 610500;
2. 中国海洋石油有限公司深圳分公司广东深圳 518067

收稿日期:2014-07-30 修回日期:2014-11-12 出版日期:2015-02-25 发布日期:2015-02-05
通讯作者: 陈平,男,1952年3月生,1982年获西南石油学院学士学位,现任西南石油大学教授,主要从事油气井工程领域的教学与研究工作。Email:chenping@swpu.edu.cn
作者简介:付建红,男,1964年6月生,1985年获西南石油学院学士学位,1987年获西南石油学院硕士学位,现任西南石油大学教授,主要从事油气井工艺教学与研究工作。Email:fujianhong@126.com
基金资助:
国家重大科技专项(2011ZX05026-001-04)资助。

Simulation on wellbore pressure during dynamic kill drilling in deep water

Fu Jianhong¹, Feng Jian¹, Chen Ping¹, Wei Hongshu², Liu Zhengli²

1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Sichuan Chengdu 610500, China;
2. CNOOC Shen Zhen Company, Guangdong Shenzhen 518067, China

Received:2014-07-30 Revised:2014-11-12 Online:2015-02-25 Published:2015-02-05

摘要/Abstract

摘要：

动态压井钻井技术可有效解决深水表层钻井过程中出现的溢流或井漏、井塌等井下复杂事故。为研究深水表层动态压井钻井过程中的压力变化特征,结合动态压井钻井基本原理,建立了动态压井钻井井筒物理模型,通过设定海水和加重钻井液的初始排量、排量随时间的变化率,推导出了变排量、变密度模式下的动态压井钻井井筒压力数学模型。根据墨西哥湾深水钻井实例数据,计算分析了动态压井钻井过程中环空密度、环空压力、环空压耗以及井底压力随时间的变化关系。结果表明,动态压井钻井技术的关键在于通过实时调整海水排量、加重钻井液排量控制混浆密度,进而控制环空液柱压力,达到深水表层安全钻井的目的;机械钻速是影响井底压力的重要因素,机械钻速越大,由岩屑产生的附加密度越大,井底压力越大。

关键词: 深水, 动态压井钻井, 井筒压力, 排量, 密度

Abstract:

Dynamic kill drilling technology can effectively handle the well kick, loss of circulation or wellbore collapse during surface drilling of deep water. In order to figure out the pressure variation characteristics of dynamic kill drilling in deep water, this paper established a physical model of wellbore in dynamic kill drilling in combination with the basic theory of dynamic kill drilling. By setting up the initial flow rate and change rates of seawater flow rate and weighted drilling fluid flow rate, it derived the wellbore pressure computation model in variable flow rate and variable density scheme. According to the field data of Mexico Gulf deep water drilling, it calculated the annualar density, annualar pressure, annular pressure loss, and bottom hole pressure during dynamic kill drilling. The results demonstrated that the key step of dynamic kill drilling technology is controlling the mixture density by regulating the flow rate of sea water and weighted drilling fluid in timely, therefore, the annular fluid column pressure in drilling process is controlled, which is favorable to safety drilling in surface of deep water. Rate of penetration (ROP) has a great effect on bottom hole pressure in dynamic kill drilling. The additional density generated by cuttings increases with the increase of ROP, causing a larger bottom hole pressure.

Key words: dynamic kill drilling, wellbore pressure, flow rate, density, deep water

中图分类号:

TE24

付建红, 冯剑, 陈平, 韦红术, 刘正礼. 深水动态压井钻井井筒压力模拟[J]. 石油学报, 2015, 36(2): 232-237.

Fu Jianhong, Feng Jian, Chen Ping, Wei Hongshu, Liu Zhengli. Simulation on wellbore pressure during dynamic kill drilling in deep water[J]. Acta Petrolei Sinica, 2015, 36(2): 232-237.

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深水动态压井钻井井筒压力模拟

Simulation on wellbore pressure during dynamic kill drilling in deep water

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