
浏览全部资源
扫码关注微信
中国石油长庆油田分公司油气工艺研究院
低渗透油气田勘探开发国家工程实验室
Received:11 June 2025,
Revised:2026-03-06,
Accepted:07 January 2026,
Published:25 September 2026
移动端阅览
段志锋,陆红军,欧阳勇,等.页岩油水平井多场耦合条件下井壁稳定性研究[J].石油机械,2026,54(9):29-37.
Duan Zhifeng,Lu Hongjun,Ouyang Yong,et al.Borehole stability of shale oil horizontal wells under multi-field coupling conditions[J].China Petroleum Machinery,2026,54(9):29-37.
段志锋,陆红军,欧阳勇,等.页岩油水平井多场耦合条件下井壁稳定性研究[J].石油机械,2026,54(9):29-37. DOI: 10.12473/CPM.202506033.
Duan Zhifeng,Lu Hongjun,Ouyang Yong,et al.Borehole stability of shale oil horizontal wells under multi-field coupling conditions[J].China Petroleum Machinery,2026,54(9):29-37. DOI: 10.12473/CPM.202506033.
针对页岩油水平井钻井过程中页岩地层富含微裂缝、遇水易产生强烈水化膨胀进而导致井壁坍塌严重的工程难题,构建了一种能准确反映流体渗流、岩石力学变形及化学水化作用多场耦合过程的数值模型。通过三轴压缩试验测定庆城页岩黏聚力与内摩擦角等参数,利用吸水膨胀试验获取膨胀应变规律。基于断裂力学理论与有限离散元方法(FDEM),构建流-固-化(HMC)耦合模型,并通过试验与现场数据进行验证。研究揭示了页岩井壁失稳的物理力学全过程:钻井液在压差作用下入渗并诱发黏土矿物水化,导致岩石强度劣化并产生微裂纹,孔隙压力沿微裂纹迅速扩散,扩散半径在200 h内由0.4倍井径扩大至0.9倍井径。参数敏感性分析表明:钻井液密度过小(<1.20 g/cm³)会直接诱发裂纹并强化水化作用,导致短时大范围坍塌(面积占比达21%);钻井液黏度在低密度条件下对坍塌抑制作用显著,而在高密度下贡献有限;地层膨胀系数由0.2增至1.0时,坍塌面积占比由8.5%骤增至32.8%;钻进方向与最大水平主应力夹角越小,应力集中越不利,坍塌面积占比随夹角减小系统性增大。HMC耦合模型相较于传统模型能更准确地预测坍塌周期与规模,建议庆城区块水平段钻井液密度取1.25~1.30 g/cm³,黏度控制在0.04~0.06 Pa·s。研究结果可为庆城区块页岩油水平井钻井参数及钻井液优化提供指导,也可为井壁控制提供理论依据。
During drilling of shale oil horizontal wells, shale formations with abundant micro-fractures are prone to strong hydration swelling once exposed to water, consequently leading to severe borehole collapse. To address this engineering problem, a numerical model that can accurately reflect the multi-field coupling process of fluid seepage, rock mechanical deformation and chemical hydration was constructed to provide a theoretical basis for drilling parameter optimization and borehole stability control of shale oil horizontal wells in the Qingcheng block. Parameters such as cohesion and internal friction angle of shales in the Qingcheng block were measured through triaxial compression tests, and the swelling strain patterns were determined through water absorption and welling experiments. Based on the fracture mechanics theory and the finite discrete element method (FDEM), a hydro-mechanical-chemical (HMC) coupling model was constructed and verified by experimental data and field data. The study reveals the whole physical and mechanical process of borehole instability in shale formations: the drilling fluid infiltrates under the differential pressure and induces hydration of clay minerals, leading to degradation of rock strength and generation of microcracks; the pore pressure diffuses rapidl
y along the microcracks, with the diffusion radius expanding from 0.4 to 0.9 times the borehole diameter within 200 h. Parameter sensitivity analysis shows that insufficient drilling fluid density (
<
1.20 g/cm
3
) directly induces cracks and intensifies hydration, resulting in large-scale collapse within a short time (the area ratio reaches 21%). The drilling fluid viscosity has a significant inhibitory effect on collapse under low-density conditions but few contributions to borehole stability under high drilling fluid density. When the formation swelling coefficient increases from 0.2 to 1.0, the collapse area increases sharply from 8.5% to 32.8%. The smaller the angle between the drilling direction and the maximum horizontal principal stress direction, the more unfavorable the stress concentration, with the collapse area increasing systematically as the angle decreases. Compared with traditional models, the HMC coupling model can more accurately predict the collapse cycle and scale. The drilling fluid density of 1.25-1.30 g/cm
3
and viscosity of 0.04-0.06 Pa·s are recommended for horizontal wellbore in the Qingcheng block. This study provides engineering guidance for trajectory design and drilling fluid optimization.
Liu Xiangjun , Zhu Honglin , Liang Lixi . Research on fabric characteristics and borehole instability mechanisms of fractured igneous rocks [J]. Petroleum Science , 2013 , 10 ( 2 ): 212 - 218 .
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, 25 .
Huang Rongzun , Chen Mian , Deng Jingen , et al . Study on shale stability of wellbore by mechanics coupling with chemistry method [J]. Drilling Fluid & Completion Fluid , 1995 , 12 ( 3 ): 15 - 21, 25 .
刘向君 , 熊健 , 梁利喜 . 龙马溪组硬脆性页岩水化实验研究 [J]. 西南石油大学学报(自然科学版) , 2016 , 38 ( 3 ): 178 - 186 .
Liu Xiangjun , Xiong Jian , Liang Lixi . Hydration experiment of hard brittle shale of the Longmaxi formation [J]. Journal of Southwest Petroleum University (Science & Technology Edition) , 2016 , 38 ( 3 ): 178 - 186 .
刘向君 , 曾韦 , 梁利喜 , 等 . 龙马溪组页岩地层井壁坍塌周期预测 [J]. 特种油气藏 , 2016 , 23 ( 5 ): 130 - 133 , 157 - 158 .
Liu Xiangjun , Zeng Wei , Liang Lixi , et al . Prediction of borehole wall collapse cycle in Longmaxi formation [J]. Special Oil & Gas Reservoirs , 2016 , 23 ( 5 ): 130-133, 157 - 158 .
薛华庆 , 周尚文 , 蒋雅丽 , 等 . 水化作用对页岩微观结构与物性的影响 [J]. 石油勘探与开发 , 2018 , 45 ( 6 ): 1075 - 1081 .
Xue Huaqing , Zhou Shangwen , Jiang Yali , et al . Effects of hydration on the microstructure and physical properties of shale [J]. Petroleum Exploration and Development , 2018 , 45 ( 6 ): 1075 - 1081 .
余致理 , 郭高峰 , 余恒 , 等 . 水化作用下页岩微观孔隙结构伤害特征 [J]. 西安石油大学学报(自然科学版) , 2022 , 37 ( 1 ): 44 - 50,100 .
Yu Zhili , Guo Gaofeng , Yu Heng , et al . Damage of hydration effect to micropore Structure of Shale [J]. Journal of Xi'an Shiyou University (Natural Science) , 2022 , 37 ( 1 ): 44 - 50, 100 .
丁乙 , 刘向君 , 梁利喜 , 等 . 应力卸载-水化协同作用下页岩井壁稳定性模型 [J]. 石油勘探与开发 , 2023 , 50 ( 6 ): 1289 - 1297 .
Ding Yi , Liu Xiangjun , Liang Lixi , et al . Wellbore stability model in shale formation under the synergistic effect of stress unloading-hydration [J]. Petroleum Exploration and Development , 2023 , 50 ( 6 ): 1289 - 1297 .
金衍 , 薄克浩 , 张亚洲 , 等 . 深层硬脆性泥页岩井壁稳定力学化学耦合研究进展与思考 [J]. 石油钻探技术 , 2023 , 51 ( 4 ): 159 - 169 .
Jin Yan , Bo Kehao , Zhang Yazhou , et al . Advancements and considerations of chemo-mechanical coupling for wellbore stability in deep hard brittle shale [J]. Petroleum Drilling Techniques , 2023 , 51 ( 4 ): 159 - 169 .
智慧文 , 栗涵洁 , 权子涵 . 井研地区筇竹寺组页岩储层水平井钻井井壁稳定性评价 [J]. 中外能源 , 2024 , 29 ( 3 ): 62 - 66 .
Zhi Huiwen , Li Hanjie , Quan Zihan . Evaluation of wellbore stability during horizontal drilling in Qiongzhusi formation shale reservoir in Jingyan area [J]. Sino-Global Energy , 2024 , 29 ( 3 ): 62 - 66 .
Young D A , Smith D E . Simulations of clay mineral swelling and hydration: dependence upon interlayer ion size and charge [J]. The Journal of Physical Chemistry B , 2000 , 104 ( 39 ): 9163 – 9170 .
徐加放 , 付元强 , 田太行 , 等 . 蒙脱石水化机理的分子模拟 [J]. 钻井液与完井液 , 2012 , 29 ( 4 ): 1 - 4 .
Xu Jiafang , Fu Yuanqiang , Tian Taihang , et al . Molecular simulation on mechanism of montmorillonite hydration [J]. Drilling Fluid & Completion Fluid , 2012 , 29 ( 4 ): 1 - 4 .
徐加放 , 顾甜甜 , 沈文丽 , 等 . 无机盐对蒙脱石弹性力学参数影响的分子模拟与实验研究 [J]. 中国石油大学学报(自然科学版) , 2016 , 40 ( 2 ): 83 - 90 .
Xu Jiafang , Gu Tiantian , Shen Wenli , et al . Influence simulation of inorganic salts on montmorillonite elastic mechanical parameters and experimental study [J]. Journal of China University of Petroleum (Edition of Natural Science) , 2016 , 40 ( 2 ): 83 - 90 .
金浩增 , 赵志红 , 唐鹏程 , 等 . 页岩储层黏土矿物水化膨胀致裂数值模拟研究 [J]. 非常规油气 , 2022 , 9 ( 2 ): 125 - 131 .
Jin Haozeng , Zhao Zhihong , Tang Pengcheng , et al . Research on numerical simulation of hydration swelling and cracking of clay minerals in shale reservoir [J]. Unconventional Oil & Gas , 2022 , 9 ( 2 ): 125 - 131 .
Li Shaopeng , Zhou Peng , Lan Baofeng . Study of wellbore instability in shale formation considering the effect of hydration on strength weakening [J]. Frontiers in Earth Science , 2024 , 12 : 1403902 .
Sunthankar A A , Kuru E , Miska S , et al . New developments in aerated mud hydraulics for drilling in inclined wells [J]. SPE Drilling & Completion , 2003 , 18 ( 2 ): 152 - 158 .
Lomba R F T , Chenevert M E , Sharma M M . The role of osmotic effects in fluid flow through shales [J]. Journal of Petroleum Science and Engineering , 2000 , 25 ( 1/2 ): 25 - 35 .
Yan Chuanliang , Dong Leifeng , Zhao Kai , et al . Time-dependent borehole stability in hard-brittle shale [J]. Petroleum Science , 2022 , 19 ( 2 ): 663 - 677 .
Li Hong , Wang Qing , Zhang Kun , et al . The invasion law of drilling fluid along bedding fractures of shale [J]. Frontiers Earth Science , 2023 , 11 : 1112441 .
Ma Tianshou , Chen Yingjie , Duan Mubai . Chemo-poroelastic coupling method for wellbore stability analysis in shale gas formation with weakness planes [J]. Geotechnical and Geological Engineering , 2018 , 36 ( 3 ): 1817 - 1831 .
0
Views
9
下载量
0
CSCD
Publicity Resources
Related Articles
Related Author
Related Institution
京公网安备11010802024621