SYSTEM AND METHOD FOR INVESTIGATING SUB-SURFACE FEATURES OF A ROCK FORMATION
    3.
    发明公开
    SYSTEM AND METHOD FOR INVESTIGATING SUB-SURFACE FEATURES OF A ROCK FORMATION 审中-公开
    SYSTEM AND METHOD FOR岩层地下特征的考试

    公开(公告)号:EP2638415A2

    公开(公告)日:2013-09-18

    申请号:EP11791670.0

    申请日:2011-11-09

    IPC分类号: G01V1/46

    摘要: A method and system for investigating rock formations outside a borehole are provided. The method includes generating a first acoustic wave at a first frequency by a first acoustic source; and generating a second acoustic wave at a second frequency by a second acoustic source. The first and the second acoustic sources are arranged within a localized area of the borehole. The first and the second acoustic waves intersect in an intersection volume outside the borehole. The method further includes receiving a third acoustic wave at a third frequency, the third shear acoustic wave returning to the borehole due to a non-linear mixing process in a non-linear mixing zone within the intersection volume at a receiver arranged in the borehole. The third frequency is equal to a difference between the first frequency and the second frequency.

    摘要翻译: 提供了一种用于调查钻孔外的岩层系统和方法。 该方法包括生成在由第一声源的第一频率的第一压缩声波; 并产生在第二频率由第二声源的第二压缩声波。 第一和第二声源被钻孔的局部区域内布置。 所述第一和第二声波在钻孔外相交体积相交英寸 该方法还包括接收在第三频率的第三剪切声波,第三剪切声波返回到钻孔由于在钻孔中的设置在接收器中的交叉容积内的非线性混合区的非线性混合过程 , 所述第三频率等于所述第一频率和所述第二频率之间的差。