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[1]李高仁,史亚红,夏宏泉,等.基于Mogi-Coulomb强度准则的井壁稳定性力学分析新方法*[J].中国安全生产科学技术,2018,14(10):70-75.[doi:10.11731/j.issn.1673-193x.2018.10.011]
 LI Gaoren,SHI Yahong,XIA Hongquan,et al.New method for mechanical analysis of wellbore stability based on Mogi-Coulomb strength criterion[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2018,14(10):70-75.[doi:10.11731/j.issn.1673-193x.2018.10.011]
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基于Mogi-Coulomb强度准则的井壁稳定性力学分析新方法*
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
14
期数:
2018年10期
页码:
70-75
栏目:
职业安全卫生管理与技术
出版日期:
2018-10-31

文章信息/Info

Title:
New method for mechanical analysis of wellbore stability based on Mogi-Coulomb strength criterion
文章编号:
1673-193X(2018)-10-0070-06
作者:
李高仁1史亚红2夏宏泉2韩龙飞2
(1.长庆油田分公司勘探开发研究院,陕西 西安 710021;2.西南石油大学 油气藏地质及开发工程国家重点实验室,四川 成都 610500)
Author(s):
LI Gaoren1 SHI Yahong2 XIA Hongquan2 HAN Longfei2
(1. Research Institute of Exploration and Development, Changqing Oilfield Company, Xi'an Shaanxi 710021, China;2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu Sichuan 610500, China)
关键词:
井壁稳定MogiCoulomb破坏准则坍塌压力破裂压力钻井液密度
Keywords:
wellbore stability MogiCoulomb failure criterion collapse pressure fracture pressure drilling fluid density
分类号:
X937
DOI:
10.11731/j.issn.1673-193x.2018.10.011
文献标志码:
A
摘要:
传统井壁坍塌失稳分析模型是基于M-C破坏准则而建立的,该方法忽略了中间主应力对岩石强度的影响,常使得预测的钻井液密度过于保守。为此,引入考虑中间主应力的Mg-C破坏准则建立任意井眼的井壁稳定性评价新模型,通过数值模拟法分析了不同地应力状态下的井斜角和方位角对井壁稳定性的影响。研究结果表明: Mg-C准则克服了M-C准则忽略中间主应力低估岩石强度的影响,其计算结果略低于M-C准则的计算结果,有助于提高钻速,降低钻井成本;正断层地应力状态时,沿最小水平主应力方向钻进时,井壁稳定性最好;走滑断层地应力状态时,沿最大与最小水平主应力之间的某一临界角钻进时井壁最稳定;逆断层地应力状态时,沿最大水平主应力方向钻进时井壁最稳定;该模型有助于指导现场钻井井眼轨迹的优化设计及安全施工。
Abstract:
The traditional analysis models of wellbore collapse instability have been established based on the M-C failure criterion, which neglected the influence of the intermediate principal stress on the rock strength and often made the predicted drilling fluid density too conservative. Therefore, the Mg-C failure criterion considering the intermediate principal stress was introduced to establish a new model of wellbore stability evaluation for any wellbore, and the influence of deviation angle and azimuth angle on the wellbore stability under different insitu stress patterns was analyzed by using the numerical simulation method. The results showed that the Mg-C criterion overcame the influence of the M-C criterion on ignoring the intermediate principal stress and underestimating the rock strength, and its calculation results were slightly lower than those of the M-C criterion, which contributed to increase the drilling rate and reduce the drilling cost. Under the normal fault insitu stress pattern, the wellbore stability was the best when drilling in the direction of the minimum horizontal principal stress. Under the strikeslip fault insitu stress pattern, the wellbore stability was the best when drilling along a certain critical angle between the maximum and minimum horizontal principal stress. Under the reverse fault insitu stress pattern, the wellbore stability was the best when drilling in the direction of the maximum horizontal principal stress. This model is helpful to guide the optimization design and safe construction of the hole trajectory in the field well drilling.

参考文献/References:

[1]金衍, 陈勉. 井壁稳定力学[M]. 北京:科学出版社,2012.
[2]路继臣,唐卫国.大港油田深井井壁稳定问题[J]. 岩石力学与工程学报, 2000, 19(s1):967-970. LU Jichen, TANG Weiguo. On deep wellbore stability for Dagang oil field[J]. Chinese Journal of Rock Mechanics and Engineering, 2000, 19(s1): 967-970.
[3]丁立钦,王志乔,王瑜,等. 层理性地层钻井稳定性分析模型[J]. 探矿工程(岩土钻掘工程), 2017, 44(3):1-9. DING Liqin, WANG Zhiqiao, WANG Yu, et al. Analysis model of borehole stability in bedding formations[J]. Exploration Engineering (Rock & Soil Drilling and Tunneling), 2017, 44(3): 1-9.
[4]冯永存,邓金根,李晓蓉,等.井壁稳定性评价准则分析[J]. 断块油气田, 2012, 19(2):244-248. FENG Yongcun, DENG Jingen, LI Xiaorong, et al. Analysis of failure criterions on wellbore stability prediction[J]. Fault-Block Oil & Gas Field, 2012, 19(2): 244-248.
[5]陈平,马天寿,范翔宇.基于井壁稳定分析的井眼轨迹优化方法[J]. 天然气工业, 2015, 35(10):84-92. CHEN Ping, MA Tianshou, FAN Xiangyu. Well path optimization based on wellbore stability analysis[J]. Nature Gas Industry, 2015, 35(10):84-92.
[6]JIMENEZ R,MA X. A note on the strength symmetry imposed by Mogi's true-triaxial criterion[J]. International Journal of Rock Mechanics & Mining Sciences, 2013, 64:17-21.
[7]HAIMSON B,CHANG C. Brittle fracture in two crystalline rocks under true triaxial compressive stresses[J]. Petrophysical Properties of Crystalline Rocks, 2005, 240(1):47-59.
[8]VERNIK L,ZOBACK M D. Estimation of maximum horizontal principal stress magnitude from stress‐induced well bore breakouts in the Cajon Pass Scientific Research borehole[J]. Journal of Geophysical Research Solid Earth, 1995, 97(B4):5109-5119.
[9]AL-AJMI A M,ZIMMERMAN R W. Relation between the mogi and the coulomb failure criteria[J]. International Journal of Rock Mechanics & Mining Sciences,2005,42(3):431-439.
[10]AL-AJMI A M,ZIMMERMAN R W. The mogi-coulomb true-triaxial failure criterion and some implications for rock engineering[C]// 11th Congress of the International Society for Rock Mechanics Congress, London: Taylor & Francis,2007: 475-486.
[11]AL-AJMI A M,ZIMMERMAN R W. A new well path optimization model for increased mechanical borehole stability[J]. Journal of Petroleum Science and Engineering, 2009, 69(1-2): 53-62.
[12]刘向君, 曾韦,梁利喜,等. 页岩层理对井壁稳定性影响分析[J]. 中国安全生产科学技术, 2016,12(11):88-92. LIU Xiangjun,ZENG Wei,LIANG Lixi, et al. Analysis on influence of shale bedding on wellbore stability[J]. Journal of Safety Science and Technology, 2016,12(11):88-92.
[13]AL-AJMI A M,AL-HARTHY M H. Probabilistic wellbore collapse analysis[J]. Journal of Petroleum Science & Engineering, 2010, 74(3):171-177.
[14]李地元,谢涛,李夕兵,等. Mogi-Coulomb强度准则应用于岩石三轴卸荷破坏试验的研究[J]. 科技导报, 2015, 33(19):84-90. LI Diyuan, XIE Tao, LI Xibing, et al. On the Mogi-Coulomb strength criterion as applied to rock triaxial unloading test[J]. Science & Technology Review, 2015, 33(19): 84-90.
[15]钟敬敏, 齐从丽, 杨志彬. 定向井安全钻井液密度窗口测井计算方法[J]. 新疆石油天然气, 2006, 2(3):38-41. ZHONG Jingmin, QI Congli, YANG Zhibin. Method of calculation the safe density window of drilling fluid in directional well by well log data interpretation [J]. Xinjiang Oil & Gas,2006,2(3):38-41.

相似文献/References:

[1]刘向君,曾韦,梁利喜,等.页岩层理对井壁稳定性影响分析[J].中国安全生产科学技术,2016,12(11):88.[doi:10.11731/j.issn.1673-193x.2016.11.015]
 LIU Xiangjun,ZENG Wei,LIANG Lixi,et al.Analysis on influence of shale bedding on wellbore stability[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2016,12(10):88.[doi:10.11731/j.issn.1673-193x.2016.11.015]

备注/Memo

备注/Memo:
收稿日期: 2018-06-23
基金项目: 国家科技重大专项(2016ZX05050)
作者简介: 李高仁,学士,高级工程师,主要研究方向为岩石力学的测井精细解释方法及应用。
通信作者: 史亚红,硕士研究生,主要研究方向为岩石力学的测井精细解释方法及应用。
更新日期/Last Update: 2018-11-07