交变应力对套管损伤机理的影响

安峰辰; 张飞扬; 易浩; 张遂安

doi:10.3969/j.issn.1001-1986.2021.01.015

交变应力对套管损伤机理的影响

doi: 10.3969/j.issn.1001-1986.2021.01.015

基金项目:

国家自然科学基金面上项目（52078482）

详细信息

第一作者:
安峰辰,1984年生,男,山西平遥人,博士,讲师,研究方向为煤层气开发.E-mail:afccup@163.com

通信作者:
张遂安,1957年生,男,山东菏泽人,博士,教授,研究方向为煤层气开发.Email:sazhang@263.net

中图分类号: TD712
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出版历程
- 收稿日期: 2020-11-20
- 修回日期: 2020-12-20
- 发布日期: 2021-02-25

Effects of alternating stress on casing damage mechanism

摘要

摘要: 水平井分段压裂技术已在低渗透油气藏及煤层气开发过程中得到了较为广泛的应用，并取得了良好的经济效果。但是，由于分段压裂会使直井段的套管承受交变应力作用，进而造成其在软硬交错地层处发生严重变形，从而影响压裂安全作业，甚至引发所有剩余压裂段报废。为探索其破坏机理，开发一个类似弹簧单元的用户子程序来模拟循环荷载作用下套管-水泥环界面的受力情况，并将该单元植入到套管-水泥环-岩层系统的ABAQUS轴对称有限元模型中，模拟水平井分段压裂过程中套管的力学行为。结果表明，在软硬交错地层中，采用水平井分段压裂时，注入压力与地应力之间的交变应力差会造成套管的大变形。此外，基于ABAQUS的数值模拟结果，采用FE-safe评估套管疲劳寿命，发现处于软硬交错地层处套管的疲劳寿命最短。基于上述研究，建议在具有软硬交错地层的低渗透油藏及煤层气储层中进行分段压裂时，应设法提高非压裂阶段压力，以减轻交变应力对软硬交错地层处的套管损伤。
- 套管损伤 /
- 煤层气 /
- 水平井分段压裂 /
- 有限元模型 /
- 用户子程序
Abstract: Horizontal well staged fracturing technology of horizontal well has been widely used in the exploitation of low-permeability oil and gas reservoirs and coalbed methane, and has achieved good economic results. However, the vertical section of the casing is found to be damaged with serious deformation in the process of multi-stage hydraulic fracturing, which will prevent bridge plugs from being installed at the preferred design depths, thereby resulting in abandonment of all remaining fracturing stages. In this study, a user element is developed to simulate the mechanical behavior at the casing-cement sheath interface under cyclic loads. The developed element is then implemented into an axisymmetric finite element(FE) model of the casing-cement sheath-stratum system through ABAQUS to simulate the mechanical behavior of the casing during horizontal well staged fracturing. The FE results reveal that casing damage with large deformation is induced by the alternation of the resultant stress between injection pressure and geo-stress. The fatigue life of the casing is then estimated through FE-safe based on the obtained results through ABAQUS, thereby finding out that the most vulnerable part of the casing is located at interlaced area between hard and soft strata with the lowest fatigue life. Based on the aforementioned results, increasing the pressure inside the casing at the non-fracturing stage is highly recommended to mitigate casing damage in the interlaced area between hard and soft strata during horizontal well staged fracturing.
- casing damage /
- CBM /
- horizontal well staged fracturing /
- finite element model /
- user element

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参考文献(36)

[1]	DEVEREUX S. Drilling technology in nontechnical language[M]. Tulsa,Oklahoma:PennWell,2012.
[2]	LI Yang,LIU Wei,YAN Wei,et al. Mechanism of casing failure during hydraulic fracturing:Lessons learned from a tight-oil reservoir in China[J]. Engineering failure analysis,2019,98:58-71.
[3]	陈朝伟,蔡永恩. 套管-地层系统套管载荷的弹塑性理论分析[J]. 石油勘探与开发,2009,36(2):242-246. CHEN Zhaowei,CAI Yongen,et al. Study on casing load in a casing-stratum system by elastoplastic theory[J]. Petroleum Exploration and Development,2009,36(2):242-246.
[4]	ZHOU Zhi,HE Jiangping,HUANG Minghua,et al. Casing pipe damage detection with optical fiber sensors:A case study in oil well constructions[J]. Advances in Civil Engineering,2010,2010:1-9.
[5]	CHIOTIS E,VRELLIS G. Analysis of casing failures of deep geothermal wells in Greece[J]. Geothermics,1995,24(5/6):695-705.
[6]	DAGDEVIREN M,YAVUZ S,KILINC N,et al. Weapon selection using the AHP and TOPSIS methods under fuzzy environment[J]. Expert Systems with Applications,2009,36:8143-8151.
[7]	GOODNIGHT R H,BARRET J P,et al. Oil-well Casing corrosion[C]//Drilling and Production Practice. New York:American Petroleum Institute,1956:9.
[8]	KRESSE O,WENG Xiaowei,GU Hongren,et al. Numerical modeling of hydraulic fractures interaction in complex naturally fractured formations[J]. Rock Mechanics and Rock Engineering,2013,46(3):555-568.
[9]	WENG Xiaowei,KRESSE O,COHEN C E,et al. Modeling of hydraulic-fracture-network propagation in a naturally fractured formation[J]. SPE Production & Operations,2011,26(4):368-380.
[10]	MCCLURE M V,BABAZADEH W M,SHIOZAWA S,et al. Fully coupled hydromechanical simulation of hydraulic fracturing in 3D discrete-fracture networks[J]. SPE Journal,2016,21(4):1302-1320.
[11]	ZHU Haiyan,DENG Jingen,JIN Xiaochun,et al. Hydraulic fracture initiation and propagation from wellbore with oriented perforation[J]. Rock Mechanics and Rock Engineering,2015,48(2):585-601.
[12]	HAGHSHENAS A,HESS J E,CUTHBERT A J. Stress analysis of tubular failures during hydraulic fracturing:Cases and lessons learned[C]//SPE Hydraulic Fracturing Technology Conference and Exhibition. Woodlands,Texas:2017:128-140.
[13]	LIAN Zhanghua,ZHANG Ying,ZHAO Xu,et al. Mechanical and mathematical models of multi-stage horizontal fracturing strings and their application[J]. Natural Gas Industry B,2015,2(2/3):185-191.
[14]	WANG Weide,TALEGHANI A D. Impact of hydraulic fracturing on cement sheath integrity:A modelling approach[J]. Journal of Natural Gas Science and Engineering,2017,44:265-277.
[15]	WANG Qianlin,ZHANG Laibin,HU Jinqiu. Real-time risk assessment of casing-failure incidents in a whole fracturing process[J]. Process Safety and Environmental Protection,2018,120:206-214.
[16]	DANESGY A A. Impact of off-balance fracturing on borehole stability and casing failure[C]//SPE Western Regional Meeting. Irvine,California:Society of Petroleum Engineers,2005:9.
[17]	LIAN Zhanghua,YU Hao,LIN Tiejun,et al. A study on casing deformation failure during multi-stage hydraulic fracturing for the stimulated reservoir volume of horizontal shale wells[J]. Journal of Natural Gas Science and Engineering,2015,23(2):538-546.
[18]	YIN Fei,GAO Deli. Prediction of sustained production casing pressure and casing design for shale gas horizontal wells[J]. Journal of Natural Gas Science and Engineering,2015,25(7):159-165.
[19]	YAN Wei,ZOU Lingzhan,LI Hong,et al. Investigation of casing deformation during hydraulic fracturing in high geo-stress shale gas play[J]. Journal of Petroleum Science and Engineering,2017,150(11):22-29.
[20]	SHEN Xinpu,SHEN Guoyang,STANDFIRD W,et al. Numerical estimation of upper bound of injection pressure window with casing integrity under hydraulic fracturing[C]//50th US rock Mechanics/Geomechanics Symposium. Houston,Texas:American Rock Mechanics Association,2016.
[21]	LIU Wei,YU Baohua,DENG Jingen. Analytical method for evaluating stress field in casing-cement-formation system of oil/gas wells[J]. Applied Mathematics and Mechanics,2017,38(9):1273-1294.
[22]	XI Yan,LI Jun,LIU Gonghui,et al. Numerical investigation for different casing deformation reasons in Weiyuan-Changning shale gas field during multistage hydraulic fracturing[J]. Journal of Petroleum Science and Engineering,2017,163(11):691-702.
[23]	陈朝伟,石林,项德贵. 长宁-威远页岩气示范区套管变形机理及对策[J]. 天然气工业,2016,36(11):70-75. CHEN Zhaowei,SHI Lin,XIANG Degui,et al. Mechanism of casing deformation in the Changning-Weiyuan national shale gas demonstration area and countermeasures[J]. Natural Gas Industry B,2017,4(1):1-6.
[24]	LIU Zhengchun,SAMUEL R,GONZALES A,et al. Analysis of casing fatigue failure during multistage fracturing operations[C]//Abu Dhabi International Petroleum Exhibition & Conference. Abu Dhabi,UAE:Society of Petroleum Engineers,2018.
[25]	JACKSON P B,MURPHEY C E. Effect of casing pressure on gas flow through a sheath of set cement[C]//SPE/IADC Drilling Conference. Amsterdam,Netherlands:Society of Petroleum Engineers,1993.
[26]	ZHANG Hongbing,XIE Danyan,SHANG Zuoping,et al. Simulated various characteristic waves in acoustic full waveform relating to cement bond on the secondary interface[J]. Journal of Applied Geophysics,2011,73(2):139-154.
[27]	XU Quanbiao,GONG Shunfeng,HU Qing. Collapse analyses of sandwich pipes under external pressure considering inter-layer adhesion behaviour[J]. Marine Structures,2016,50:72-94.
[28]	CARRARA P,LORENZIS D L.A coupled damage-plasticity model for the cyclic behavior of shear-loaded interfaces[J]. Journal of the Mechanics and Physics of Solids,2015,85(2):33-53.
[29]	HORDIJK D A. Local approach to fatigue of concrete[D]. Delft:Delft University of Technology,1991.
[30]	LU Xinzheng,TENG Jinguang,YE Lieping,et al. Bond-slip models for FRP sheets/plates bonded to concrete[J]. Engineering Structures,2005,27(6):920-937.
[31]	MINER M A. Cumulative damage in fatigue[J]. Journal of Applied Mechanics,1954,67:A159-A164.
[32]	MATSUISHI M,ENDO T. Fatigue of metals subjected to varying stress[J]. Japan Society of Mechanical Engineers,1968,68(2):37-40.
[33]	RAMBERGW,OSOOD W R. Description of stress-strain curves by three parameters[R]. Washington D C:National Bureau of Standards,1943.
[34]	COFFIN Jr L F. A study of the effects of cyclic thermal stresses on a ductile metal[R]. United States:Knolls Atomic Power Lab,1953.
[35]	MANSON S S. Behavior of materials under conditions of thermal stress[J]. National Advisory Committee for Aeronautics,1953.
[36]	BROWN M,MILLER K J. A theory for fatigue under multiaxial stress-strain conditions[C]//Proceedings of the Institution of Mechanical Engineers. Institute of Mechanical Engineers,1973,187(1):745-756.