|本期目录/Table of Contents|

[1]郭永宾 管 申 刘智勤 彭 巍 徐一龙.涠洲W油田全油基强封堵钻井液技术[J].中国海上油气,2020,32(04):117-123.[doi:10.11935/j.issn.1673-1506.2020.04.014]
 GUO Yongbin GUAN Shen LIU Zhiqin PENG Wei XU Yilong.Full oil-based strong sealing drilling fluid technology in Weizhou W oilfield[J].China Offshore Oil and Gas,2020,32(04):117-123.[doi:10.11935/j.issn.1673-1506.2020.04.014]
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涠洲W油田全油基强封堵钻井液技术()

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

卷:
第32卷
期数:
2020年04期
页码:
117-123
栏目:
钻采工程
出版日期:
2020-07-25

文章信息/Info

Title:
Full oil-based strong sealing drilling fluid technology in Weizhou W oilfield
文章编号:
1673-1506(2020)04-0117-07
作者:
郭永宾 管 申 刘智勤 彭 巍 徐一龙
(中海石油(中国)有限公司湛江分公司 广东湛江 524057)
Author(s):
GUO Yongbin GUAN Shen LIU Zhiqin PENG Wei XU Yilong
(CNOOC China Limited, Zhanjiang Branch, Zhanjiang, Guangdong 524057, China)
关键词:
全油基钻井液 油水比 井壁稳定 储层保护
Keywords:
full oil-based drilling fluid oil-water ratio borehole stability reservoir protection
分类号:
TE254+.4
DOI:
10.11935/j.issn.1673-1506.2020.04.014
文献标志码:
A
摘要:
涠洲W油田涠二段易垮塌地层所用常规油基钻井液油水比和破乳电压低,乳化状态稳定性不够,易引起地层泥页岩水化分散,给井壁失稳和储层保护造成困难。在分析涠二段硬脆性灰色泥岩垮塌机理基础上,通过提高油水比来提高钻井液的乳化稳定性、优化复合粒径封堵材料,构建了全油基强封堵钻井液体系。室内性能评价结果表明,优化后的全油基钻井液乳化稳定性强,塑性黏度小、滤失量小、封堵承压效果好,抗水和土污染能力强。全油基强封堵油基钻井液体系已在涠洲W油田11口定向井中取得成功应用,解决了超千米长裸眼涠二段易垮塌地层井壁失稳问题,同时储层保护效果良好。本文研究成果可为类似硬脆性泥页岩易垮塌地层钻进和储层保护提供借鉴
Abstract:
Accurate calibration of the recovery of ultra-high pressure and low permeability gas reservoirs is of great significance to the development plan of this kind of gas reservoirs, so the influences of reservoir bound water, elastic expansion and stress sensitivity of rock on the recovery of those reservoirs is analyzed. Based on the material balance equation, the calculation formula of recovery under abandonment conditions is deduced, and the two key factors influencing recovery of ultra-high pressure and low permeability gas reservoir are defined as the system compressibility and abandonment pressure by analyzing the formula. From the perspective of gas high-speed non-Darcy seepage theory, the seepage equation under pseudo-pressure conditions is established. Combining with the test results of the relationship between the reservoir rock stress change and rock characteristics, a new gas well pressure expression considering the change of rock permeability as a power function is derived, and the abandonment pressure is quantitatively characterized. The influence of those two key factors on recovery is analyzed by using the data of a high pressure gas reservoir in Ledong gas field, and the results show that the two factors have significant influences on recovery, which should be considered in the calculation process

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备注/Memo

备注/Memo:
收稿日期:2019-04-24 改回日期:2019-08-27*中国海洋石油有限公司科研项目“北部湾油田经济开发钻完井技术研究(编号:YXKY-2019-ZJ-04)”部分研究成果。 第一作者简介: 郭永宾,男,教授级高级工程师,1996年毕业于原石油大学(华东)钻井工程专业,现从事海洋油气钻完井的研究和管理工作。地址:广东省湛江市坡头区22号信箱(邮编:524057)。E-mail:guoyb@cnooc.com.cn。
更新日期/Last Update: 2020-07-20