[1]王宴濱,高德利,房軍.頁巖氣水平井壓裂過程水泥環力學特性評價研究[J].石油管材與儀器,2020,6(04):51-55.[doi:10.19459/j.cnki.61-1500/te.2020.04.009]
 WANG Yanbin,GAO Deli,FANG Jun.Assessment on the Cement Mechanical Properties of Shale Gas Horizontal Well in Fracturing Process[J].Petroleum Tubular Goods & Instruments,2020,6(04):51-55.[doi:10.19459/j.cnki.61-1500/te.2020.04.009]
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頁巖氣水平井壓裂過程水泥環力學特性評價研究
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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:
51-55
欄目:
頁巖氣專題
出版日期:
2020-08-20

文章信息/Info

Title:
Assessment on the Cement Mechanical Properties of Shale Gas Horizontal Well in Fracturing Process
文章編號:
2096-0077(2020)04--0051-05
作者:
王宴濱高德利房軍
中國石油大學(北京),石油工程教育部重點實驗室 北京 102249
Author(s):
WANG Yanbin GAO Deli FANG Jun
MOE Key Laboratory of Petroleum Engineering, China University of PetroleumBeijing, Beijing 102249, China
關鍵詞:
頁巖氣體積壓裂套管-水泥環井筒完整性
Keywords:
shale gas volume fracturing casingcement sheath wellbore integrity
分類號:
TE934+.2
DOI:
10.19459/j.cnki.61-1500/te.2020.04.009
文獻標志碼:
A
摘要:
針對頁巖氣水平井大規模體積壓裂過程中,套管-水泥環組合系統在外部載荷作用下產生破壞而引發的井筒完整性問題,采用彈性力學和復變函數方法,建立了該組合系統的力學特性分析模型,分別以Von-Mises屈服準則和Drucker-Prager巖土屈服條件作為套管和水泥環的屈服判據,對頁巖氣井壓裂過程組合系統的薄弱環節進行了分析;在此基礎上,對井筒完整性進行了參數評價和敏感性討論。計算結果表明:頁巖氣井壓裂過程中,水泥環比套管更易屈服,從而引發井筒完整性問題;套管壁厚和水泥環泊松比越大,井筒越安全;低彈性模量的水泥環,對井筒完整性有利;水泥環厚度存在最優值使井筒最安全;需要根據井筒完整性和壓裂施工效果,綜合確定壓裂施工壓力。
Abstract:
Wellbore integrity faliure, which is a common problem in horizontal well volume fracturing process for shale gas, is easily induced by damage of casingcement sheath under external loads. The analysis model is established through elastic mechanics and complex variables functions, and the weak part of the system is obtained based on the VonMises yield criterion and the DruckerPragercriterion for geotechnical materials. On this basis, the wellbore integrity of shale gas horizontal well is assessed, and the parameter sensitivity analysis is presented. Analysis results show that the cement sheath is more likely to yield than casing during fracturing process, and is the main precipitating factor for wellbore integrity. Bigger casing wall thickness, Poisson′s ratio of cement sheath, and lower elastic modulus of cement sheath are advantageous for wellbore integrity. There is an optimal value of cement sheath thickness from the point of view of wellbore integrity. The fracturing pressure should be determined by wellbore integrity and the effect of hydraulic fracturing operation.

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備注/Memo

備注/Memo:
基金項目:國家自然科學基金青年基金項目(項目編號:51804321);國家重點研發計劃課題(課題編號:2016YFC0303303);國家自然科學基金創新研究群體項目(項目編號:51521063);中國石油大學(北京)科研基金資助(項目編號:00000) 第一作者簡介:王宴濱,男,1988年生,副教授,中國石油大學(北京)石油工程學院,主要研究方向為油氣井力學與控制工程。E-mail:[email protected]
更新日期/Last Update: 2020-08-25
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