| 各向异性地层井壁破裂压力预测 |
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| 引用本文： | 马天寿,唐弢,陈平,陈春宇,孙少林,刘阳.各向异性地层井壁破裂压力预测[J].中国石油大学学报(自然科学版),2019(3):80-89. |
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| 作者姓名： | 马天寿 唐弢 陈平 陈春宇 孙少林 刘阳 |
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| 作者单位： | 西南石油大学油气藏地质及开发工程国家重点实验室;中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室;中国石油长庆油田公司油气工艺研究院;中国石油西部钻探克拉玛依钻井公司 |
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| 基金项目： | 国家自然科学基金项目(41874216,51604230);四川省科技计划项目(2017HH0061) |
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| 摘 要： | 地层破裂压力对于钻井和水力压裂非常重要,但直井破裂压力预测往往忽略了地层各向异性的影响。考虑岩石各向异性影响,推导直井井壁应力分布模型,建立各向异性地层破裂压力计算方法,并分析层理产状、各向异性程度、地应力及孔隙压力的影响。结果表明:低角度层理对破裂压力几乎无影响,而高角度层理对破裂压力影响显著;向最大水平地应力方向倾斜的层理,其破裂压力最低,极端情况下甚至比各向同性地层低50%,对井壁稳定极为不利;岩石各向异性程度越高,对破裂压力的影响越大;随着水平地应力比值和孔隙压力的增加,破裂压力整体上逐渐减小,而且地应力影响明显高于岩石各向异性,水平地应力比值增加后,岩石各向异性的影响进一步加剧;该模型提高了破裂压力计算的精度。
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| 关 键 词： | 岩石力学 各向异性 横观各向同性 井壁应力 破裂压力 |
Prediction of fracture pressure of wellbore for anisotropic formations |
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| MA Tianshou,TANG Tao,CHEN Ping,CHEN Chunyu,SUN Shaolin,LIU Yang.Prediction of fracture pressure of wellbore for anisotropic formations[J].Journal of China University of Petroleum,2019(3):80-89. |
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| Authors: | MA Tianshou TANG Tao CHEN Ping CHEN Chunyu SUN Shaolin LIU Yang |
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| Institution: | (State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu 610500,China;State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071,China;Oil and Gas Technology Institute of Changqing Oilfield Company,PetroChina,Xi an 710018,China;Karamay Drilling Company,PetroChina West Drilling,Karamay 834009,China) |
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| Abstract: | MA Tianshou;TANG Tao;CHEN Ping;CHEN Chunyu;SUN Shaolin;LIU Yang(State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu 610500,China;State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071,China;Oil and Gas Technology Institute of Changqing Oilfield Company,PetroChina,Xi an 710018,China;Karamay Drilling Company,PetroChina West Drilling,Karamay 834009,China) |
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| Keywords: | rock mechanics anisotropy transverse isotropy wellbore stress fracture pressure |
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