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DETERMINING IN-SITU THE RELATION BETWEEN SEISMIC VELOCITY AND STATE OF STRESS IN AN UNDERGROUND FORMATION

机译:现场确定地下地层的地震速度与应力状态之间的关系

摘要

A method of determining in-situ a relation between the seismic velocity and the state of stress in an underground formation located under a surface subjected to time-changing surface loading conditions, which method comprises selecting a relation between the seismic velocity and the state of stress containing at least one unknown parameter; placing a seismic source at surface or in a borehole penetrating the underground formation, and a seismic receiver at a distance from the seismic source at surface or in a second borehole; determining at two different times the seismic velocity of the formation along a path from the seismic source to the seismic receiver; converting the difference in surface loading conditions at the two times in a difference in states of stress in the underground formation; and calculating the unknown parameter(s) to obtain the relation between the seismic velocity and the state of stress in the underground formation.
机译:一种现场确定地震波速度与应力状态之间关系的方法,该地下地层位于承受时变表面载荷条件的地表下,该方法包括选择地震波速度与应力状态之间的关系包含至少一个未知参数;将地震源放置在穿透地下地层的地表或钻孔中,并将地震接收器放置在地表或第二个钻孔中距地震源一定距离的位置;在两个不同的时间确定沿着从地震源到地震接收器的路径的地层的地震速度;将两次表面载荷条件的差异转换为地下地层中应力状态的差异;计算未知参数以获得地震速度与地下地层应力状态之间的关系。

著录项

  • 公开/公告号EP1761805B1

    专利类型

  • 公开/公告日2013-05-01

    原文格式PDF

  • 申请/专利权人 SHELL INT RESEARCH;

    申请/专利号EP20050761148

  • 发明设计人 MOLENAAR MENNO MATHIEU;

    申请日2005-06-28

  • 分类号G01V1/30;

  • 国家 EP

  • 入库时间 2022-08-21 16:35:25

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