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考虑三向应力作用的渤南泥页岩地层坍塌压力

刘晓兰 于立松

刘晓兰, 于立松. 考虑三向应力作用的渤南泥页岩地层坍塌压力[J]. 钻井液与完井液, 2016, 33(4): 27-31. doi: 10.3969/j.issn.1001-5620.2016.04.005
引用本文: 刘晓兰, 于立松. 考虑三向应力作用的渤南泥页岩地层坍塌压力[J]. 钻井液与完井液, 2016, 33(4): 27-31. doi: 10.3969/j.issn.1001-5620.2016.04.005
LIU Xiaolan, YU Lisong. Determination of Formation Collapse Pressure of Bonan Shale Taking into Account Tri-axial Stresses[J]. DRILLING FLUID & COMPLETION FLUID, 2016, 33(4): 27-31. doi: 10.3969/j.issn.1001-5620.2016.04.005
Citation: LIU Xiaolan, YU Lisong. Determination of Formation Collapse Pressure of Bonan Shale Taking into Account Tri-axial Stresses[J]. DRILLING FLUID & COMPLETION FLUID, 2016, 33(4): 27-31. doi: 10.3969/j.issn.1001-5620.2016.04.005

考虑三向应力作用的渤南泥页岩地层坍塌压力

doi: 10.3969/j.issn.1001-5620.2016.04.005
基金项目: 

胜利石油管理局局级课题“泥页岩力学化学耦合井壁稳定预测技术研究”(GKB1304)。

详细信息
    作者简介:

    刘晓兰,高级工程师,1980年生,2008年毕业于中国石油大学(华东)油气井工程专业并获得博士学位,现从事钻井工艺技术和天然气水合物方面研究.E-mail:151816360@qq.com.

  • 中图分类号: TE21

Determination of Formation Collapse Pressure of Bonan Shale Taking into Account Tri-axial Stresses

  • 摘要: 渤南区块罗家地区沙三储层以泥页岩为主,泥页岩厚度大、分布广,有机碳含量高,富含油气。但是该组地层微裂缝发育,岩石强度各向异性明显,加上水化作用影响,水平井钻井过程中井壁稳定问题突出,使用传统坍塌压力预测模型不能有效计算泥页岩储层的坍塌压力,普通考虑弱面的分析模型通常忽略了中间主应力对岩石强度的影响,预测结果也不如意。在对罗家地区泥页岩矿物成分和微裂缝分布情况分析的基础上,基于弱面强度理论,综合考虑三向应力的影响,建立了更精确的坍塌压力预测模型。实例分析表明,对于该区域的泥页岩钻井,一味地增大钻井液密度并不能保证井壁稳定,该区块岩石碳酸盐矿物含量较多,原始强度较高,且地层孔隙度低,如果使用控压钻井,使井底压力略低于地层压力,可增加岩石强度,增大井壁稳定性,并降低钻井成本,增加钻速。

     

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出版历程
  • 收稿日期:  2016-05-06
  • 刊出日期:  2016-07-31

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