Volume 46 Issue 1
Jan.  2018
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LIU Xiangjun, DING Yi, LUO Pingya, LIANG Lixi. The Impact of Drilling Unloading on Wellbore Stability of Shale Formations[J]. Petroleum Drilling Techniques, 2018, 46(1): 10-16. DOI: 10.11911/syztjs.2018005
Citation: LIU Xiangjun, DING Yi, LUO Pingya, LIANG Lixi. The Impact of Drilling Unloading on Wellbore Stability of Shale Formations[J]. Petroleum Drilling Techniques, 2018, 46(1): 10-16. DOI: 10.11911/syztjs.2018005
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The Impact of Drilling Unloading on Wellbore Stability of Shale Formations

  • State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation(Southwest Petroleum University), Chengdu, Sichuan, 610500, China

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  • Received Date: March 09, 2017
  • Revised Date: January 05, 2018
    Graphical Abstract
    • Abstract
  • It is easy for wellbores to lose stability during drilling through shale formations where induced fractures and cracks might be generated due to drilling unloading in rocks around the wellbore and the consequent reduces rock strength which thereby can cause wellbore instability.To ensure consistent wellbore stability while drilling through shale,the author simulated stress change process during drilling unloading with a triaxial testing system to analyze the impact of unloading on shale mechanical properties.Further,the relationship between shale cohesion,internal friction angle and the unloading amplitude was set up with the regression method,and a wellbore stability model was established that took into consideration the unloading effect by introducing the newly defined relationship into normal wellbore stability model.Testing results demonstrated that unloading will reduce shale strength and accordingly shale strength reduction will increase with the increase of unloading.Considering the unloading effect,wellbore collapse pressure will increase for the shale(especially for shale under high in-situ stress and strong anisotropy).When the angle between the borehole and the minimum horizontal stress is comparatively small,the effect of unloading on the shale wellbore stability is limited.The research results indicated that the effect of unloading on wellbore collapse pressure of shale should not be overlooked,and it should be taken into account in designing the drilling fluid.
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  • [1]
    马天寿,陈平.层理页岩水平井井周剪切失稳区域预测方法[J].石油钻探技术,2014,42(5):26-36. MA Tianshou,CHEN Ping.Prediction method of shear instability region around the borehole for horizontal wells in bedding shale[J].Petroleum Drilling Techniques,2014,42(5):26-36.
    [2]
    丁乙,梁利喜,刘向君,等.温度和化学耦合作用对泥页岩地层井壁稳定性的影响[J].断块油气田,2016,23(5):663-667. DING Yi,LIANG Lixi,LIU Xiangjun,et al.Influence of temperature and chemical on wellbore stability in clay shale formation[J].Fault-Block Oil Gas Field,2016,23(5):663-667.
    [3]
    崔云海,刘厚彬,杨海平,等.焦石坝页岩气储层水平井井壁失稳机理[J].石油钻采工艺,2016,38(5):545-552. CUI Yunhai,LIU Houbin,YANG Haiping,et al.Mechanisms of sidewall stability loss in horizontal wells drilled for shale gas development in Jiaoshiba Block[J].Oil Drilling Production Technology,2016,38(5):545-552.
    [4]
    赵凯,樊勇杰,于波,等.硬脆性泥页岩井壁稳定研究进展[J].石油钻采工艺,2016,38(3):277-285. ZHAO Kai,FAN Yongjie,YU Bo,et al.Research progress of wellbore stability in hard brittle shale[J].Oil Drilling Production Technology,2016,38(3):277-285.
    [5]
    王东明,陈勉,罗玉财,等.华北古近系及潜山内幕地层井壁稳定性研究[J].钻井液与完井液,2016,33(6):33-39. WANG Dongming,CHEN Mian,LUO Yucai,et al.Borehole stability in drilling the Paleogene system in Huabei Oilfield[J].Drilling Fluid Completion Fluid,2016,33(6):33-39.
    [6]
    陈平,马天寿,夏宏泉.含多组弱面的页岩水平井坍塌失稳预测模型[J].天然气工业,2014,34(12):87-93. CHEN Ping,MA Tianshou,XIA Hongquan.A collapse pressure prediction model of horizontal shale gas wells with multiple weak planes[J].Natural Gas Industry,2014,34(12):87-93.
    [7]
    SIMPSON J P,WALKER T O,JIANG G Z.Environmentally acceptable water-based mud can prevent shale hydration and maintain borehole stability[J].SPE Drilling Completion,1995,10(4):242-249.
    [8]
    黄荣樽,陈勉,邓金根,等.泥页岩井壁稳定力学与化学的耦合研究[J].钻井液与完井液,1995,12(3):15-21. HUANG Rongzun,CHEN Mian,DENG Jin’gen.Study on shale stability of wellbore by mechanics coupling with chemistry method[J].Drilling Fluid Completion Fluid,1995,12(3):15-21.
    [9]
    YEW C H,CHENEVERT M E,WANG C L,et al.Wellbore stress distribution produced by moisture adsorption[J].SPE Drilling Engineering,1990,5(4):311-316.
    [10]
    AADNOY B S,CHENEVERT M E.Stability of highly inclined boreholes[J].SPE Drilling Engineering,1987,2(4):364-374.
    [11]
    陈运平,席道瑛,薛彦伟.循环载荷下饱和岩石的应力-应变动态响应[J].石油地球物理勘探,2003,38(4):409-413. CHEN Yunping,XI Daoying,XUE Yanwei.Dynamic stress-strain response insaturated rocks under cycling load[J].Oil Geophysical Prospecting,2003,38(4):409-413.
    [12]
    许江,鲜学福,王鸿,等.循环加、卸载条件下岩石类材料变形特性的实验研究[J].岩石力学与工程学报,2006,25(增刊1):3040-3045. XU Jiang,XIAN Xuefu,WANG Hong,et al.Experimental study on rock deformation characteristics under cycling loading and unloading conditions[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(supplement1):3040-3045.
    [13]
    谢红强,何江达,徐进.岩石加卸载变形特性及力学参数实验研究[J].岩土工程学报,2003,25(3):336-338. XIE Hongqiang,HE Jiangda,XU Jin.Deformation characteristics of rock under loading and unloading conditions and experimental study of mechanical parameters[J].Chinese Journal of Geotechnical Engineering,2003,25(3):336-338.
    [14]
    金衍,陈勉.井壁稳定力学[M].北京:科学出版社,2012:13-66. JIN Yan,CHEN Mian.Wellbore stability mechanics[M].Beijing:Science Press,2012:13-66.
    [15]
    CHEATHAM J B Jr.Wellbore stability[J].Journal of Petroleum Technology,1984,36(6):2066-2075.
    [16]
    刘杰,雷岚,王瑞红,等.冻融循环中低应力水平加卸载作用下砂岩动力特性研究[J].岩土力学,2017,38(9):2539-2550. LIU Jie,LEI Lan,WANG Ruihong,et al.Dynamic characteristics of sandstone under low-stress level conditions in freezing-thawing cycles[J].Rock and Soil Mechanics,2017,38(9):2539-2550.
    [17]
    祝方才,余继江,刘丙肖,等.基于地应力场加卸载的地下洞室稳定数值模拟研究[J].岩土工程学报,2016,38(9):1578-1585. ZHU Fangcai,YU Jijiang,LIU Bingxiao,et al.Numerical analysis of stability of underground openings through loading/unloading of in-situ stress fields[J].Chinese Journal of Geotechnical Engineering,2016,38(9):1578-1585.
    [18]
    JAEGER J C.Shear failure of anisotropicrocks[J].Geological Magazine,1960,97(1):65-72.
    [19]
    陈新,杨强,何满潮,等.考虑深部岩体各向异性强度的井壁稳定分析[J].岩石力学与工程学报,2005,24(16):2882-2888. CHEN Xin,YANG Qiang,HE Mangchao,et al.Stability analysis of wellbore based on anisotropic strength criterion for deep jointed rock mass[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(16):2882-2898.
    [20]
    CHEN Guizhong,CHENEVERT M E,SHARMA M M,et al.A study of wellbore stability in shales including poroelastic,chemical,and thermal effects[J].Journal of Petroleum Science and Engineering,2003,38(3/4):167-176.
    [21]
    温航,陈勉,金衍,等.硬脆性泥页岩斜井段井壁稳定力化耦合研究[J].石油勘探与开发,2014,41(6):748-754. WEN Hang,CHEN Mian,JIN Yan,et al.A chemo-mechanical coupling model of deviated borehole stability in hard brittle shale[J].Petroleum Exploration and Development,2014,41(6):748-754.
    [22]
    MA Tianshou,CHEN Ping,YANG Chunhe,et al.Wellbore stability analysis and well path optimization based on the breakout width model and Mogi-Coulomb criterion[J].Journal of Petroleum Science and Engineering,2015,135:678-701.
    [23]
    梁利喜,许强,刘向君.基于极限平衡理论定量评价井壁稳定性[J].石油钻探技术,2006,34(2):15-17. LIANG Lixi,XU Qiang,LIU Xiangjun.Quantitative evaluation of well wall stability based on the theory of limit equilibrium[J].Petroleum Drilling Techniques,2006,34(2):15-17.
    [24]
    赵军,秦伟强,张莉,等.偶极横波各向异性特征及其在地应力评价中的应用[J].石油学报,2005,26(4):54-57. ZHAO Jun,QIN Weiqiang,ZHANG Li,et al.Anisotropy of dipole shear wave and its application to ground stress evaluation[J].Acta Petrolei Sinica,2005,26(4):54-57.
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