[1]尹飛,韓禮紅,陳穎杰,等.頁巖氣井壓裂套管變形評價及水泥環性能優化[J].石油管材與儀器,2020,6(04):41-45.[doi:10.19459/j.cnki.61-1500/te.2020.04.007]
 YIN Fei,HAN Lihong,CHEN Yingjie,et al.Assessment of Casing Deformation and Optimization of Cement Sheath Performance Under Fracturing Shale Gas Wells[J].Petroleum Tubular Goods & Instruments,2020,6(04):41-45.[doi:10.19459/j.cnki.61-1500/te.2020.04.007]
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頁巖氣井壓裂套管變形評價及水泥環性能優化
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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:
41-45
欄目:
頁巖氣專題
出版日期:
2020-08-20

文章信息/Info

Title:
Assessment of Casing Deformation and Optimization of Cement Sheath Performance Under Fracturing Shale Gas Wells
文章編號:
2096-0077(2020)04--0041-05
作者:
尹飛1韓禮紅2陳穎杰3楊尚諭2史彪彬1
1. 成都理工大學能源學院 四川 成都 610059;2. 中國石油集團石油管工程技術研究院,石油管材及裝備材料服役行為與結構安全國家重點實驗室 陜西 西安 710077;3. 中國石油西南油氣田公司 四川 成都 610051
Author(s):
YIN Fei1 HAN Lihong2 CHEN Yingjie3 YANG Shangyu2 SHI Biaobin1
1. College of Energy, Chengdu University of Technology, Chengdu, Sichuan 610059, China; 2. State Key Laboratory for Performance and Structure Safety of Petroleum Tubular Goods and Equipment Materials, CNPC Tubular Goods Research Institute, Xi′an,Shaanxi 710077, China;3. PetroChina Southwest Oil & Gas Field Company, Chengdu, Sichuan 610051, China
關鍵詞:
井筒完整性頁巖氣井水力壓裂套管變形水泥環性能
Keywords:
wellbore integrity shale gas wells hydraulic fracturing casing deformation cement sheath performance
分類號:
TE25
DOI:
10.19459/j.cnki.61-1500/te.2020.04.007
文獻標志碼:
A
摘要:
頁巖氣井在水力壓裂過程中出現了大量套管變形(套變),對頁巖氣井壓裂施工和單井產量造成不利影響;谔鬃兙y計分析、井徑測井解釋、微地震解釋等,揭示頁巖氣井套變主要機理。建立裂縫滑移作用下頁巖氣井筒力學模型,分析了頁巖氣井筒力學響應及橋塞遇阻機制。通過敏感性分析探討了水泥環性能優化方法。結果表明:壓裂誘發的裂縫滑移對套管產生了剪切與拉伸作用,引起套管出現較大的轉角和曲率(狗腿度),“壓裂套變狗腿”阻礙了橋塞等工具順利下入。使用低彈性模量的水泥環能夠顯著地降低裂縫滑移作用下套變狗腿度。建議在斷層/天然裂縫帶上下2.0 m采用彈性模量小于1.0 GPa的改性水泥環,可降低壓裂過程套變及工具遇阻的故障率。
Abstract:
A large number of casing deformation occurred during hydraulic fracturing in shale gas wells. It adversely affected the fracturing operation and production. The main mechanism of casing deformation in shale gas wells is revealed based on the statistical analysis, logging interpretation and microseismic interpretation. The mechanical model of a shale gas well under the action of fracture slip is established. Then, the response of well and the blockage mechanism of bridge plug are analyzed. The performance optimization of cement sheath is discussed by adopting sensitivity analysis. The results indicate that fracture slip induced by fracturing applies shear and tensile loads on the casing, causing large angle and curvature of the casing (dogleg degree). It hinders the smooth entry of the bridge plug and other tools. The cement sheath with low elastic modulus can significantly reduce the dogleg degree of casing under the action of fracture slip. The modified cement sheath with elastic modulus less than 1.0 GPa is recommended to use in the 2.0 m above and below the faults or natural fractures to reduce the failure rate of casing deformation and tool blockage during fracturing.

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備注/Memo

備注/Memo:
基金項目:國家重點研發計劃(項目編號:2019YFF0217600、2016ZX05022-055);國家自然科學基金(項目編號:51904038);陜西省杰出青年科學基金(項目編號:2018JC-030);中國石油集團科研項目(項目編號:2019A-3911) 第一作者簡介: 尹飛,男,1985年生,2016年畢業于中國石油大學(北京)油氣井工程專業,獲博士學位,目前從事井筒完整性、井壁穩定及鉆井提速方面的研究工作。E-mail: [email protected]
更新日期/Last Update: 2020-08-25
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