泥页岩井壁稳定问题在世界许多油田都存在,至今一直没有能够得到很好地解决.为此,在假定泥页岩为线弹性体的条件下,建立了均匀地应力作用下泥页岩水化后井眼周围应力分布的计算模型。对该模型利用差分方法进行了求解,并编制了 Windows ...泥页岩井壁稳定问题在世界许多油田都存在,至今一直没有能够得到很好地解决.为此,在假定泥页岩为线弹性体的条件下,建立了均匀地应力作用下泥页岩水化后井眼周围应力分布的计算模型。对该模型利用差分方法进行了求解,并编制了 Windows 应用程序,该程序可计算出泥页岩水化后井眼周围岩石的含水量分布、井眼周围的应力分布及保持井壁稳定所需的坍塌压力。该研究方法及所得结论,对于解决泥页岩地层的井壁失稳问题具有较大的指导意义.展开更多
On April 20, 2013, the Lushan M^7.0 earthquake struck at the southern part of the Longmenshan fault in the eastern Tibetan Plateau, China. The shear-wave splitting in the crust indicates a connection between the direc...On April 20, 2013, the Lushan M^7.0 earthquake struck at the southern part of the Longmenshan fault in the eastern Tibetan Plateau, China. The shear-wave splitting in the crust indicates a connection between the direction of the principal crustal com- pressive stress and the fault orientation in the Longmenshan fault zone. Our relocation analysis of the aftershocks of the Lushan earthquake shows a gap between the location of the rupture zone of the Lushan Ms7.0 earthquake and that of the rup- ture zone of the Wenchuan MsS.0 earthquake. We believe that stress levels in the crust at the rupture gap and its vicinity should be monitored in the immediate future. We suggest using controlled source borehole measurements for this purpose.展开更多
文摘泥页岩井壁稳定问题在世界许多油田都存在,至今一直没有能够得到很好地解决.为此,在假定泥页岩为线弹性体的条件下,建立了均匀地应力作用下泥页岩水化后井眼周围应力分布的计算模型。对该模型利用差分方法进行了求解,并编制了 Windows 应用程序,该程序可计算出泥页岩水化后井眼周围岩石的含水量分布、井眼周围的应力分布及保持井壁稳定所需的坍塌压力。该研究方法及所得结论,对于解决泥页岩地层的井壁失稳问题具有较大的指导意义.
基金supported by the National Natural Science Foundation of China (Grant Nos. 41174042, 41040034)the China National Special Fund for Earthquake Scientific Research in Public Interest (Grant No. 201008001)
文摘On April 20, 2013, the Lushan M^7.0 earthquake struck at the southern part of the Longmenshan fault in the eastern Tibetan Plateau, China. The shear-wave splitting in the crust indicates a connection between the direction of the principal crustal com- pressive stress and the fault orientation in the Longmenshan fault zone. Our relocation analysis of the aftershocks of the Lushan earthquake shows a gap between the location of the rupture zone of the Lushan Ms7.0 earthquake and that of the rup- ture zone of the Wenchuan MsS.0 earthquake. We believe that stress levels in the crust at the rupture gap and its vicinity should be monitored in the immediate future. We suggest using controlled source borehole measurements for this purpose.
