非均匀孔隙压力场导向水压裂纹扩展机制
为揭示非均匀孔隙压力场对水压裂纹扩展的影响,采用多孔弹性力学、断裂力学、渗流力学和热弹性力学理论,建立了考虑孔隙压力的水压裂纹尖端应力强度因子计算模型,并采用室内实验和RFPA2DFlow数值模拟软件进一步分析了非均匀孔隙压力场对水压裂缝扩展的导向机制.研究结果表明：孔隙压力场的存在可以增大水压裂纹尖端的应力强度因子,从而诱导水压裂缝沿高孔隙压力方向扩展;同时,水压裂纹尖端的应力强度因子会随着孔隙压力增大而增大,孔隙压力越大,裂纹的偏转幅度也会越大....
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| Published in | 东北大学学报（自然科学版） Vol. 37; no. 7; pp. 1028 - 1033 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
重庆大学复杂煤气层瓦斯抽采国家地方联合工程实验室，重庆 400030%重庆大学煤矿灾害动力学与控制国家重点实验室，重庆 400030
2016
重庆大学煤矿灾害动力学与控制国家重点实验室，重庆 400030 Department of Energy and Mineral Engineering，EMS Energy Institute and G3 Center，The Pennsylvania State University，University Park，PA 16802，USA |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1005-3026 |
| DOI | 10.3969/j.issn.1005-3026.2016.07.025 |
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| Abstract | 为揭示非均匀孔隙压力场对水压裂纹扩展的影响,采用多孔弹性力学、断裂力学、渗流力学和热弹性力学理论,建立了考虑孔隙压力的水压裂纹尖端应力强度因子计算模型,并采用室内实验和RFPA2DFlow数值模拟软件进一步分析了非均匀孔隙压力场对水压裂缝扩展的导向机制.研究结果表明：孔隙压力场的存在可以增大水压裂纹尖端的应力强度因子,从而诱导水压裂缝沿高孔隙压力方向扩展;同时,水压裂纹尖端的应力强度因子会随着孔隙压力增大而增大,孔隙压力越大,裂纹的偏转幅度也会越大. |
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| AbstractList | TD712; 为揭示非均匀孔隙压力场对水压裂纹扩展的影响，采用多孔弹性力学、断裂力学、渗流力学和热弹性力学理论，建立了考虑孔隙压力的水压裂纹尖端应力强度因子计算模型，并采用室内实验和 RFPA2D -Flow数值模拟软件进一步分析了非均匀孔隙压力场对水压裂缝扩展的导向机制。研究结果表明：孔隙压力场的存在可以增大水压裂纹尖端的应力强度因子，从而诱导水压裂缝沿高孔隙压力方向扩展；同时，水压裂纹尖端的应力强度因子会随着孔隙压力增大而增大，孔隙压力越大，裂纹的偏转幅度也会越大。 为揭示非均匀孔隙压力场对水压裂纹扩展的影响,采用多孔弹性力学、断裂力学、渗流力学和热弹性力学理论,建立了考虑孔隙压力的水压裂纹尖端应力强度因子计算模型,并采用室内实验和RFPA2DFlow数值模拟软件进一步分析了非均匀孔隙压力场对水压裂缝扩展的导向机制.研究结果表明：孔隙压力场的存在可以增大水压裂纹尖端的应力强度因子,从而诱导水压裂缝沿高孔隙压力方向扩展;同时,水压裂纹尖端的应力强度因子会随着孔隙压力增大而增大,孔隙压力越大,裂纹的偏转幅度也会越大. |
| Abstract_FL | To reveal the effect of non-uniform pressure on hydraulic fractures propagation,the porous elasticity mechanics, fracture mechanics, seepage mechanics and thermal elasticity mechanics were used to build a hydrofracture crack tip stress intensity factor calculation model considering the pore pressure. Then,through laboratory experiments and numerical simulation, the guiding mechanism of pore pressure on hydrofracture was verified. The research results showed that pore pressure can increase the crack tip stress intensity factor of hydrofracture,which causes the fractures extend to the high pore pressure region;at the same time,stress intensity factor of hydrofracture will be enlarged with the increase of pore pressure. A larger pore pressure will lead to larger deflection amplitude of fractures. |
| Author | 卢义玉 贾云中 汤积仁 宋晨鹏 |
| AuthorAffiliation | 重庆大学煤矿灾害动力学与控制国家重点实验室,重庆400030 重庆大学复杂煤气层瓦斯抽采国家地方联合工程实验室,重庆400030 Department of Energy and Mineral Engineering, EMS Energy Institute and G3 Center,The Pennsylvania State University, University Park, PA 16802, USA |
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| Author_FL | JIA Yun-zhong SONG Chen-peng LU Yi-yu TANG Ji-ren |
| Author_FL_xml | – sequence: 1 fullname: LU Yi-yu – sequence: 2 fullname: JIA Yun-zhong – sequence: 3 fullname: TANG Ji-ren – sequence: 4 fullname: SONG Chen-peng |
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| DOI | 10.3969/j.issn.1005-3026.2016.07.025 |
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| DocumentTitleAlternate | Mechanism of Hydrofracture Propag ation Control by Nonuniform Pore Pressure Field |
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| Keywords | 水压裂纹 non-uniform pore pressure field hydrofracture RFPA2D-Flow stress intensity factor fracture propagation control 非均匀孔隙压力场 应力强度因子 裂纹导向 |
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| Notes | 21-1344/T non-uniform pore pressure field; hydrofracture; stress intensity factor; fracturepropagation control; RFPA2D -Flow Toreveal the effect of non-uniform pressure on hydraulic fractures propagation,theporous elasticity mechanics, fracture mechanics, seepage mechanics and thermal elasticitymechanics were used to build a hydrofracture crack tip stress intensity factor calculation modelconsidering the pore pressure. Then ,through laboratory experiments and numerical simulation,the guiding mechanism of pore pressure on hydrofracture wa s verified. The research resultsshowed that pore pressure can increase the crack tip stress intensity factor of hydrofracture, whichcauses the fractures extend to the high pore pressure region; at the same time, stress intensityfactor of hydrofracture will be enlarged with the increase of pore pressure. A larger pore pressurewill lead to larger deflection amplitude of fractures. LU Yi-yu,JIA Yun-zhong, TANG Ji-ren,SONG Chen-peng（1. State Key Laboratory of Coal Mine Disaster Dyna |
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| PublicationTitle | 东北大学学报（自然科学版） |
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| Publisher | 重庆大学复杂煤气层瓦斯抽采国家地方联合工程实验室，重庆 400030%重庆大学煤矿灾害动力学与控制国家重点实验室，重庆 400030 重庆大学煤矿灾害动力学与控制国家重点实验室，重庆 400030 Department of Energy and Mineral Engineering，EMS Energy Institute and G3 Center，The Pennsylvania State University，University Park，PA 16802，USA |
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| Snippet | 为揭示非均匀孔隙压力场对水压裂纹扩展的影响,采用多孔弹性力学、断裂力学、渗流力学和热弹性力学理论,建立了考虑孔隙压力的水压裂纹尖端应力强度因子计算模型,并采用室内实... TD712; 为揭示非均匀孔隙压力场对水压裂纹扩展的影响，采用多孔弹性力学、断裂力学、渗流力学和热弹性力学理论，建立了考虑孔隙压力的水压裂纹尖端应力强度因子计算模型，并... |
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| SubjectTerms | RFPA2D-Flow 应力强度因子 水压裂纹 裂纹导向 非均匀孔隙压力场 |
| Title | 非均匀孔隙压力场导向水压裂纹扩展机制 |
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