Method of obtaining improved geophysical information about earth formations
    3.
    发明授权
    Method of obtaining improved geophysical information about earth formations 有权
    获取改进的地球物理信息的方法

    公开(公告)号:US06253848B1

    公开(公告)日:2001-07-03

    申请号:US09607309

    申请日:2000-06-29

    IPC分类号: E21B4700

    摘要: The present invention provides a method for forming wellbores. In one method, one or more wellbores are drilled along preplanned paths based in part upon seismic surveys performed from the surface. An acoustic transmitter conveyed in such wellbores transmits acoustic signals at a one or more frequencies within a range of frequencies at a plurality of spaced locations. A plurality of substantially serially spaced receivers in the wellbores and/or at s receive signals reflected by the subsurface formations. The sensors may be permanently installed in the boreholes and could be fiber optic devices. The receiver signals are processed by conventional geophysical processing methods to obtain information about the subsurface formations. This information is utilized to update any prior seismographs to obtain higher resolution seismographs. The improved seismographs are then used to determine the profiles of the production wellbores to be drilled. Borehole seismic imaging may then be used to further improve the seismographs and to plan future wellbores. Cross-well tomography may be utilized to further update the seismographs to manage the reservoirs. The permanently installed sensors may also be used to monitor the progress of fracturing in nearby wells and thereby provide the necessary information for controlling fracturing operations.

    摘要翻译: 本发明提供一种形成井筒的方法。 在一种方法中,部分地基于从表面进行的地震测量,沿着预先设计的路径钻一个或多个井筒。 在这种井筒中传送的声发射器以多个间隔位置的频率范围内的一个或多个频率发射声信号。 井眼中的多个基本上串联的接收器和/或在地下地层反射的接收信号。 传感器可以永久地安装在钻孔中,并且可以是光纤装置。 接收机信号通过常规的地球物理处理方法进行处理,以获得有关地下地层的信息。 该信息用于更新任何先前的地震仪以获得更高分辨率的地震仪。 然后使用改进的地震仪来确定要钻探的生产井筒的轮廓。 然后可以使用井眼地震成像来进一步改进地震仪和计划未来的井筒。 可以利用横井断层扫描来进一步更新地震仪以管理储层。 永久安装的传感器也可用于监测附近井中压裂的进展,从而提供控制压裂作业的必要信息。

    Resonance tools for use in wellbores
    5.
    发明授权
    Resonance tools for use in wellbores 失效
    用于井筒的共振工具

    公开(公告)号:US6009948A

    公开(公告)日:2000-01-04

    申请号:US863249

    申请日:1997-05-27

    摘要: The present invention provides a system for performing a suitable operation in a wellbore utilizing a resonator. The system includes a resonator for generating pulses of mechanical energy, an engaging device for securely engaging an object in the wellbore and a sensor for detecting the response of the object to pulses generated by the resonator. The resonator is placed at a suitable location in the wellbore and the engaging device is attached to the object. The resonator is operated at an effective frequency to induce pulses into the object. The sensor detects the response of the object to the induced pulses, which information is utilized to adjust the operating frequency. The system in different configurations can be used to fish, free a stuck drill string, aid drilling of wellbores and to perform a cementing operation. A control circuit controls the operation of the system according to programmed instructions.

    摘要翻译: 本发明提供一种利用谐振器在井眼中进行合适的操作的系统。 该系统包括用于产生机械能的脉冲的谐振器,用于牢固地接合井眼中的物体的接合装置和用于检测物体对由谐振器产生的脉冲的响应的传感器。 谐振器被放置在井眼中的适当位置,并且接合装置附接到物体上。 谐振器以有效频率工作以将脉冲引入物体。 传感器检测物体对感应脉冲的响应,该信号用于调整工作频率。 不同配置的系统可用于鱼,释放卡住的钻柱,辅助钻井和进行固井操作。 控制电路根据编程指令来控制系统的操作。