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    12.
    发明专利
    未知

    公开(公告)号：NO20071437L

    公开(公告)日：2007-05-25

    申请号：NO20071437

    申请日：2007-03-16

    Applicant: SCHLUMBERGER TECHNOLOGY BV

    Inventor： KAMATA MASAHIRO

    IPC: G01V13/00

    Abstract: Various techniques are described which may be used to facilitate and improve seismic exploration activities. For example, one aspect of the present invention is directed to a technique for enabling in-situ measurement of geophone response parameters. Another aspect of the present invention is directed to a technique for improving geophone calibration and for improving the accuracy of measurement of geophone response parameters. Yet another aspect of the present invention is directed to a technique for compensating geophone response output data in order to improve the accuracy of such data.

    DOWNHOLE SEISMIC EXPLORATION DEVICE AND APPARATUS
    13.
    发明专利
    DOWNHOLE SEISMIC EXPLORATION DEVICE AND APPARATUS 未知

    公开(公告)号：AU7135791A

    公开(公告)日：1991-05-23

    申请号：AU7135791

    申请日：1991-02-25

    Applicant: SCHLUMBERGER TECHNOLOGY BV

    Inventor： KAMATA MASAHIRO ,  KATAYAMA SHITOMI ,  MONS FRANCIS ,  PORTER ROBERT

    IPC: G01V1/40 ,  G01V1/16 ,  G01V11/00

    Abstract: A downhole seismic exploration device comprises a seismic detector such as a geophone and a magnetic clamp, supported by O-rings (45, 46) in an open cradle carrier (39) which can be secured to a cable (64) linking several such devices into an array. The array is lowered into a cased borehole and the magnetic clamps (51, 52) are operated to clamp the devices temporarily to the casing. Seismic signals detected by the geophones are transmitted to the surface via the cable (64), the O-ring supports (45, 46) acting to reduce or eliminate transmission of vibrations from the borehole fluid and the cable (64) via the carrier (39) to the geophone (44). The array is then unclamped and moved to another location in the borehole and the operation repeated. The magnetic clamp comprises a rotatable permanent magnet with radial poles disposed between a pair of parallel pole piece plates protruding on each side of the device and separated by non-magnetic blocks on each side of the magnet. When the magnet poles are aligned parallel to the pole piece plates the magnetic flux extends along closed paths entirely within the pole pieces and there is no clamping action. When the magnet is rotated 90° by a small motor the magnetic flux extends along the pole pieces and out of the device, clamping the device by magnetic attraction to the casing. A piezo bimorph element can be operated to vibrate the device to test the quality of the clamping before the acquisition of seismic data.

    Method of monitoring a drilling path
    17.
    发明专利
    Method of monitoring a drilling path 未知

    公开(公告)号：GB2399173A

    公开(公告)日：2004-09-08

    申请号：GB0409019

    申请日：2001-10-19

    Applicant: SCHLUMBERGER TECHNOLOGY BV ,  SCHLUMBERGER HOLDINGS

    Inventor： ARMSTRONG PHILIP ,  SHABBIR AHMED ,  KAMATA MASAHIRO

    IPC: E21B7/04 ,  E21B47/022 ,  G01V1/42

    Abstract: A method of monitoring the path of a borehole comprises acquiring drill bit seismic data while a borehole is being drilled. The acquired drill bit seismic data is used to determine whether the drilling path of the borehole is correct, for example by using the acquiring drill bit seismic data to update the geological model used to determime the drilling path. The drilling path of the borehole is updated using seismic data acquired as the borehole is being drilled, so that it is not necessary to interrupt the drilling process in order to update the drilling path. The invention thus makes possible a real-time, or near real-time, method of progressively updating the drilling path. The invention also provides a method of determining the properties of a surface or near-surface layer (7). The source of seismic energy for this method is acoustic energy, generated by the impact of the drill bit (9), that is transmitted up the drill string (10) and re-radiated into the earth at the top of the borehole (6).

    Method of monitoring a drilling path
    19.
    发明专利
    Method of monitoring a drilling path 未知

    公开(公告)号：GB2399173B

    公开(公告)日：2005-12-07

    申请号：GB0409019

    申请日：2001-10-19

    Applicant: SCHLUMBERGER TECHNOLOGY BV ,  SCHLUMBERGER HOLDINGS

    Inventor： ARMSTRONG PHILIP ,  SHABBIR AHMED ,  KAMATA MASAHIRO

    IPC: E21B7/04 ,  E21B47/022 ,  G01V1/42

    Abstract: A method of monitoring the path of a borehole comprises acquiring drill bit seismic data while a borehole is being drilled. The acquired drill bit seismic data is used to determine whether the drilling path of the borehole is correct, for example by using the acquiring drill bit seismic data to update the geological model used to determine the drilling path. The drilling path of the borehole is updated using seismic data acquired as the borehole is being drilled, so that it is not necessary to interrupt the drilling process in order to update the drilling path. The invention thus makes possible a real-time, or near real-time, method of progressively updating the drilling path. The invention also provides a method of determining the properties of a surface or near-surface layer (7). The source of seismic energy for this method is acoustic energy, generated by the impact of the drill bit (9), that is transmitted up the drill string (10) and re-radiated into the earth at the top of the borehole (6).

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