|本期目录/Table of Contents|

[1]郑永建 曾 桃 李跃林 白坤森 熊 钰.南海高温高压气井外部温度场建立与井底压力计算[J].中国海上油气,2019,31(04):125-134.[doi:10.11935/j.issn.1673-1506.2019.04.016 ]
 ZHENG Yongjian ZENG Tao LI Yuelin BAI Kunsen XIONG Yu.Establishment of external temperature field and calculation of bottom-hole pressure of HTHP gas wells in the South China Sea[J].China Offshore Oil and Gas,2019,31(04):125-134.[doi:10.11935/j.issn.1673-1506.2019.04.016 ]
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南海高温高压气井外部温度场建立与井底压力计算()

《中国海上油气》[ISSN:1673-1506/CN:11-5339/TE]

卷:
第31卷
期数:
2019年04期
页码:
125-134
栏目:
钻采工程(南海西部钻完井技术研究专辑)
出版日期:
2019-07-25

文章信息/Info

Title:
Establishment of external temperature field and calculation of bottom-hole pressure of HTHP gas wells in the South China Sea
文章编号:
1673-1506(2019)04-0125-10
作者:
郑永建1 曾 桃1 李跃林1 白坤森2 熊 钰2
(1. 中海石油(中国)有限公司湛江分公司 广东湛江 524057; 2. 西南石油大学石油工程学院 四川成都 610500)
Author(s):
ZHENG Yongjian1 ZENG Tao1 LI Yuelin1 BAI Kunsen2 XIONG Yu2
(1. CNOOC China Limited, Zhanjiang Branch, Zhanjiang, Guangdong 524057, China; 2. Petroleum Engineering College of Southwest Petroleum University, Chengdu, Sichuan 610500, China)
关键词:
南海 高温高压 气井 井筒温度 井底压力
Keywords:
the South China Sea HTHP gas well wellbore temperature bottom-hole pressure
分类号:
TE27+1
DOI:
10.11935/j.issn.1673-1506.2019.04.016
文献标志码:
A
摘要:
南海高温高压(HTHP)气井产能计算时,根据井筒内测试的静、流压梯度推算获得的井底压力数据易导致产能测试曲线异常,且井口关井恢复压力呈下降趋势而不能用于试井分析。针对南海HTHP气井特点,综合考虑大气对流和辐射传热、隔水管外海水垂向剖面、地温梯度剖面等因素,将气井外部温度场从井口开始分为井口以及海平面以上井筒段、海平面以下至泥线井段、泥线以下井段等3段并分段建立了井筒温度计算模型,进而采用温度-压力耦合求解方法计算井底压力。研究结果表明,采用本文建立的井筒温度计算模型计算井底压力结果与实测数据相对误差在5‰以内,可以有效解决二项式产能测试曲线为负的问题; 同时,利用关井井口压力计算井底恢复压力平均误差0.617‰,可满足试井解释精度要求。本文研究成果对于南海HTHP气井压力计算及产能预测具有指导意义。
Abstract:
When calculating productivity of high temperature and high pressure(HTHP)gas wells in the South China Sea, the bottom-hole pressure data obtained from static and flow pressure gradient calculation of in-wellbore testing often causes abnormal productivity test curves, and the shut-in recovery pressure of wellbore shows a downward trend, which cannot be used for well testing analysis. According to the characteristics of HTHP gas wells, and considering the factors of atmospheric convection and radiation heat transfer, vertical profile of sea water outside marine riser and geothermal gradient profile, the temperature fields outside gas wells are divided into wellhead and wellbore section above sea level, wellbore section below sea level to mud line section and wellbore section below mud line. The wellbore temperature calculation model is established and the bottom-hole pressure is calculated by temperature-pressure coupling method. The results show that the relative error between calculated bottom-hole pressure and measured data is less than 5 per thousand, which can effectively solve the problem of negative binomial productivity test curve. Meanwhile, the average error of bottom-hole recovery pressure calculated by shut-in wellhead pressure is 0.617 per thousand, which can achieve the demanded well test interpretation accuracy. The research results in this paper have guiding significance for pressure calculation and productivity prediction of HTHP gas wells in the South China Sea.

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备注/Memo

备注/Memo:
*中海石油(中国)有限公司综合科研项目“东方气田群高温高压天然气藏开发关键技术研究(编号:YXKY-2016-ZHJ-02)”部分研究成果。 第一作者简介: 郑永建,男,高级工程师,1995年毕业于西南石油大学石油工程专业,现从事海上油气开发、测试、生产技术研究及管理工作。地址:广东省湛江市坡头区22号信箱(邮编:524057)。E-mail:zhengyj@cnooc.com.cn。
更新日期/Last Update: 1900-01-01