[1]張華禮,李玉飛,王漢.C-W區塊頁巖氣井大規模多級壓裂套管失效主控因素及防控措施分析[J].石油管材與儀器,2020,6(04):77-81.[doi:10.19459/j.cnki.61-1500/te.2020.04.014]
 ZHANG Huali,LI Yufei,WANG Han.The Main Control Factors and Responses for Casing Failure of Largescale Multistage Fracturing of Shale Gas Wells in C-W Block[J].Petroleum Tubular Goods & Instruments,2020,6(04):77-81.[doi:10.19459/j.cnki.61-1500/te.2020.04.014]
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C-W區塊頁巖氣井大規模多級壓裂套管失效主控因素及防控措施分析
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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:
77-81
欄目:
頁巖氣專題
出版日期:
2020-08-20

文章信息/Info

Title:
The Main Control Factors and Responses for Casing Failure of Largescale Multistage Fracturing of Shale Gas Wells in C-W Block
文章編號:
2096-0077(2020)04--0077-05
作者:
張華禮李玉飛王漢
中石油西南油氣田公司工程技術研究院 四川 成都 610031
Author(s):
ZHANG Huali LI YufeiWANG Han
Engineering Technology Research Institute of PetroChina Southwest Oil and Gas Field Company, Chengdu,Sichuan 610031, China
關鍵詞:
頁巖氣多級壓裂套管失效不均勻系數主控因素防控措施
Keywords:
shale gas multistage fracturing casing failure nonuniformity coefficient main factors responses
分類號:
TE25
DOI:
10.19459/j.cnki.61-1500/te.2020.04.014
文獻標志碼:
A
摘要:
C-W區塊多口頁巖氣井發生套管失效,嚴重制約了頁巖氣安全、高效、經濟開采。針對C-W區塊油層套管失效特征,分析了復雜應力條件下非均勻外擠力、彎曲應力、剪切應力等對套管抗擠強度的影響規律和套管失效影響主控因素,提出了降低套管失效概率的防控方案和失效后的應對措施。結果表明:越靠近水平段A點,套管失效風險越大;套管抗擠強度主要受應力不均勻系數、彎曲度等因素影響,而大規模體積壓裂的持續累加效應是導致套管失效的主控因素;與單方面的提高套管鋼級相比,增加套管壁厚對預防套管失效效果更佳,且經濟性較好。
Abstract:
Casing deformation and failure occurred in many shale gas wells in C-W block, which seriously restricted the safe, efficient and economic exploitation of shale gas. In view of the casing failure characteristics in C-W block, this paper analyzed the influence of nonuniform outer pressure, bending stress and shear stress on casing collapse strength and the main control factors of casing failure under complex stress conditions. The prevention and control schemes to reduce the casing failure probability were proposed as well as the countermeasures after the casing failure. The results show that the closer to the horizontal section A, the greater the casing failure risk is. The casing collapse strength is mainly affected by the nonuniformity coefficient of stress and the bending degree. The continuous cumulative effect of largescale fracturing is the main control factor of casing failure. Compared with improving casing steel grade unilaterally, increasing casing wall thickness has better effect on preventing casing failure and is more economical.

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備注/Memo

備注/Memo:
基金項目:中國石油天然氣集團有限公司重大科技專項“西南油氣田天然氣上產300億立方米關鍵技術研究與應用”,課題十二“四川盆地頁巖氣田開發工藝技術優化研究及應用”(項目編號:2016E-0612);中國石油天然氣集團有限公司重大現場試驗項目“深層頁巖氣有效開采關鍵技術攻關與試驗”,任務三“深層頁巖氣水平井優快鉆完井技術現場試驗”(項目編號:2019F-31-03) 第一作者簡介:張華禮,男,1975年生,1998年畢業于 西安 石油學院,主要從事石油井下工具、完井試油及井筒完整性評價等方面工作。E-mail:[email protected]
更新日期/Last Update: 2020-08-25
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