[1]張慧,李軍,韓葛偉,等.瞬態力—熱耦合作用下套管應力影響因素分析[J].石油管材與儀器,2020,6(04):73-76.[doi:10.19459/j.cnki.61-1500/te.2020.04.013]
 ZHANG Hui,LI Jun,HAN Gewei,et al.Effects of Multifactor on Casing Stress Under Transient Thermalmechanical Coupling[J].Petroleum Tubular Goods & Instruments,2020,6(04):73-76.[doi:10.19459/j.cnki.61-1500/te.2020.04.013]
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瞬態力—熱耦合作用下套管應力影響因素分析
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《石油管材與儀器》[ISSN:2096-0077/CN:61-1500/TE]

卷:
6
期數:
2020年04期
頁碼:
73-76
欄目:
頁巖氣專題
出版日期:
2020-08-20

文章信息/Info

Title:
Effects of Multifactor on Casing Stress Under Transient Thermalmechanical Coupling
文章編號:
2096-0077(2020)04--0073-04
作者:
張慧1李軍12韓葛偉3張鑫1張小軍1
1.中國石油大學(北京)石油工程學院 北京 102249;2.中國石油大學(北京)克拉瑪依校區 新疆 克拉瑪依 834000; 3.渤海鉆探第一固井公司 河北 任丘 062552
Author(s):
ZHANG Hui1 LI Jun12 HAN Gewei3 ZHANG Xin1 ZHANG Xiaojun1
1.China University of PetroleumBeijing, Beijing 102249, China; 2. China University of PetroleumBeijing at Karamay, Karamay, Xinjiang 834000, China;3. Bohai Drilling Engineering Company Limited, Renqiu, Hebei 062552, China
關鍵詞:
頁巖氣套管變形有限元套管偏心力-熱耦合
Keywords:
shale gas casing deformation finite element casing eccentricity thermalmechanical coupling
分類號:
TE931+.2
DOI:
10.19459/j.cnki.61-1500/te.2020.04.013
文獻標志碼:
A
摘要:
頁巖氣井壓裂過程中出現的套管變形問題已經成為制約我國頁巖氣高效開發的重要因素。在頁巖氣水平井固井時常出現套管偏心現象,且頁巖氣井壓裂改造次數多、井下溫度場變化大,套管承受復雜的交變載荷;诖私⑻坠芷那闆r下的力-熱耦合模型,分析了注液溫度、壓力、排量等因素對套管應力的影響。計算結果表明:壓裂過程中,套管溫度先迅速降低,然后逐漸穩定;套管內壁最大應力隨偏心角的增大而增大;注液溫度越低,井底溫度下降越快,導致套管最大應力增大;在力-熱耦合條件下,套管內壁的最大應力隨著壓力的增大而增大;排量增加,傳熱系數增大,套管最大應力也隨之增大。
Abstract:
The casing deformation problem in shale gas wells has become an important factor that restricts the efficient development of shale gas. In the shale gas reservoir, casing eccentricity often occurs during casing cementing. In addition, the fracturing time is longer, and the downhole temperature field changes greatly during later reservoir reconstruction. Therefore, this paper establishes casing eccentric thermalmechanical coupling model, and analyzes the effects of injection temperature, internal pressure and displacement on the instantaneous stress of casing. Results indicate that the casing temperature decreases rapidly to nearly constant temperature during fracturing. The maximum stress of the inner wall of the casing increases with the increase of the eccentricity angle. The lower the injection temperature, the faster the bottom hole temperature decreases, resulting in an increase in the maximum casing stress.Under thermalmechanical coupling conditions, the maximum stress on the inner wall of the casing increases with pressure increasing. The heat transfer coefficient increases with the increase of displacement, and then the maximum stress of the casing also increases.

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備注/Memo

備注/Memo:
基金項目:國家自然科學基金聯合基金重點項目“頁巖氣水平井井筒完整性失效機理與控制方法”(項目編號:U1762211);中石化工程公司項目“威榮區塊深層頁巖氣井筒完整性關鍵技術研究”(項目編號:SG18-29K);國家自然科學基金-企業創新發展聯合基金課題“海相深層油氣富集機理與關鍵工程技術基礎研究-構造應力集中區頁巖氣井套管載荷模型及結構完整性失效機理”(項目編號:U19B6003-05-04-02) 第一作者簡介:張慧,女,1997年生,碩士研究生,2019年畢業于西南石油大學石油工程專業,現在中國石油大學( 北京 )從事套管變形研究。E-mail: [email protected]
更新日期/Last Update: 2020-08-25
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