深水井精细控压下套管研究

doi:10.11885/j.issn.16745086.2021.04.28.07

西南石油大学学报(自然科学版) ›› 2021, Vol. 43 ›› Issue (4): 175-182.DOI: 10.11885/j.issn.16745086.2021.04.28.07

• 深层和非常规油气钻完井专刊 • 上一篇下一篇

深水井精细控压下套管研究

童传新¹, 张海荣², 徐璧华³, 赵琥⁴, 崔策⁴

1. 中国海洋石油湛江分公司, 广东湛江 524057;
2. 南方海洋科学与工程广东省实验室(湛江), 广东湛江 524088;
3. 油气藏地质及开发工程国家重点实验室·西南石油大学, 四川成都 610500;
4. 中海油田服务股份有限公司油田化学研究院, 河北廊坊 065201

收稿日期:2021-04-28 发布日期:2021-08-06
通讯作者: 童传新,E-mail:tongchx@cnooc.com.cn
作者简介:童传新,1968年生,男,汉族,江苏江都人,教授级高级工程师,主要从事油气田勘探开发评价方面的研究工作。E-mail:tongchx@cnooc.com.cn
张海荣,1985年生,男,汉族,广西贵港人,高级工程师,硕士,主要从事油气田开发方面的研究工作。E-mail:zhanghr@zjblab.com
徐璧华,1964年生,男,汉族,重庆璧山人,教授,硕士,主要从事油气井固井水泥浆体系和水泥环力学性能方面的研究工作。E-mail:xubh@vip.163.com
赵琥,1977年生,男,汉族,云南开远人,高级工程师,硕士,主要从事固井技术方面的研究。E-mail:zhaohu4@cosl.com.cn
崔策,1993年生,男,汉族,河北任丘人,助理工程师,硕士,主要从事固井水泥浆体系的研究工作。E-mail:cuice@cnooc.com.cn
基金资助:
南方海洋科学与工程广东省实验室（湛江）项目（ZJW-2019-04）

A Study of Precisely Managed Pressure During Casing Running in Deep Water Wells

TONG Chuanxin¹, ZHANG Hairong², XU Bihua³, ZHAO Hu⁴, CUI Ce⁴

1. CNOOC China Limited, Zhanjiang Branch, Zhanjiang, Guangdong 524057, China;
2. Guangdong Provincial Laboratory of Southern Marine Science and Engineering, Zhanjiang, Guangdong 524088, China;
3. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
4. Oilfield Chemistry Research Institute, China Oilfield Services Limited, Langfang, Hebei 065201, China

Received:2021-04-28 Published:2021-08-06

摘要/Abstract

摘要： 深水窄压力窗口地层给下套管带来了巨大挑战，下套管时产生的波动压力将导致井筒压力超过压力窗口上限而出现井漏，大大增加了作业时间，采用传统方法下套管时为了防止波动压力过大而超过安全压力窗口只能降低下套管速度，这样虽然在一定程度上减小漏失风险但增大了作业成本，且这种方式不一定有效。因此，针对深水窄安全压力窗口地层下套管漏失风险问题，基于动态波动压力建立了深水窄安全压力窗口井筒压力控制模型；并在此基础上提出深水精细控压下套管方法。利用建立的模型分析井筒压力影响因素发现，井筒压力随着套管下入深度、最大下入速度、钻井液密度以及钻井液的屈服值、黏度的增大而增大。计算表明，深水精细控压下套管不但降低了漏失风险，还缩短了作业时间，降低了作业成本。

关键词: 深水, 精细控压, 下套管, 波动压力, 井漏

Abstract: Deep-water formations with a narrow pressure window pose a huge challenge to casing running. The surge-swab pressure generated during casing running will cause the wellbore pressure to exceed the upper limit of the formation pressure window and cause lost circulation. When a lost circulation occurs in offshore operation, the operating time will be greatly increased. In order to prevent excessive surge-swab pressure from exceeding the safety pressure window when using conventional methods for casing running, the casing running speed can be reduced. This reduces the leakage risk to a certain extent, it increases drilling costs, but does not apply to some wells. Therefore, for leakage risk during casing running in deep-water narrow safety pressure window formations, a deep-water narrow safety pressure window wellbore pressure control model is established on the basis of dynamic surge-swab pressure; and a deep-water precise-control managed pressure method for casing running is proposed. Using the established dynamic surge-swab pressure model to analyze the influencing factors of wellbore pressure, it is found that the surge-swab pressure of the wellbore increases with the increase of casing depth, maximum running speed, drilling fluid density, yield value and viscosity of drilling fluid. The calculation results show that shows that the precise managed pressure in deep water not only reduces the leakage risk, but also shortens the operation time and reduces the operation cost.

Key words: deep-water, precise managed pressure, casing running, surge-swab pressure, lost circulation

中图分类号:

TE21

童传新, 张海荣, 徐璧华, 赵琥, 崔策. 深水井精细控压下套管研究[J]. 西南石油大学学报(自然科学版), 2021, 43(4): 175-182.

TONG Chuanxin, ZHANG Hairong, XU Bihua, ZHAO Hu, CUI Ce. A Study of Precisely Managed Pressure During Casing Running in Deep Water Wells[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2021, 43(4): 175-182.

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深水井精细控压下套管研究

A Study of Precisely Managed Pressure During Casing Running in Deep Water Wells

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