| 基于地应力场的复压造新缝力学条件 |
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| 引用本文： | 刘红星.基于地应力场的复压造新缝力学条件[J].佳木斯大学学报,2008,26(5). |
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| 作者姓名： | 刘红星 |
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| 作者单位： | [1]南京大学地球科学系,江苏南京210093 [2]大庆油田有限责任公司井下作业一大队,黑龙江大庆163453 |
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| 摘 要： | 重复压裂裂缝的延伸轨迹主要受地层应力场的控制,对于重复压裂地层当前应力场是决定裂缝起裂和延伸的关键条件.本文建立了原始地应力场、初次裂缝诱导应力场、孔隙压力诱导应力场模型,并运用叠加原理,建立重复压裂应力场,给出了裂缝转向的力学条件,通过对实际井的计算得出裂缝的周围应力场分布和裂缝的延伸轨迹.
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| 关 键 词： | 重复压裂 裂缝延伸 造新缝 应力场 判别条件 |
The Mechanics Equation of Generating new Fracture under Refracturing Basing on Stress Field |
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| LIU Hong-xing.The Mechanics Equation of Generating new Fracture under Refracturing Basing on Stress Field[J].Journal of Jiamusi University(Natural Science Edition),2008,26(5). |
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| Authors: | LIU Hong-xing |
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| Institution: | 1.Geoscience Department;Nanjing University;Nanjing 210093;China;2.The First Group of Borehole Operation;Daqing Oilfield.Ltd.Daqing 163514;China |
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| Abstract: | The extending trace of refracturing crack is controlled mainly by in situ stress field.It is the current in situ stress field when refracturing,which is a key factor to decide crack initiating and extending.In this paper,models of the original in situ stress field,the induced stress field of primary crack and pore pressure induced stress field are built;the overlay principle is used,from which the refracturing stress field is built and the mechanical condition of crack diverting is put out.From field calcul... |
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| Keywords: | refracturing fracture propagation new fracture stress field discretion condition |
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