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    Microhydraulic fracturing with downhole acoustic measurement
    4.
    发明授权
    Microhydraulic fracturing with downhole acoustic measurement 有权
    具有井下声学测量的微型液压破碎

    公开(公告)号：US09477002B2

    公开(公告)日：2016-10-25

    申请号：US12430914

    申请日：2009-04-28

    申请人： Douglas E. Miller ,  Ahmad Latifzai ,  Romain Charles Andre Prioul ,  Bruce A. MacKay ,  Oliver C. Mullins ,  Andreas Hausot ,  Canyun Wang ,  Alireza Farahani

    发明人： Douglas E. Miller ,  Ahmad Latifzai ,  Romain Charles Andre Prioul ,  Bruce A. MacKay ,  Oliver C. Mullins ,  Andreas Hausot ,  Canyun Wang ,  Alireza Farahani

    IPC分类号： G01V1/46 ,  E21B33/124 ,  E21B43/26 ,  E21B47/10

    CPC分类号： G01V1/46 ,  E21B33/124 ,  E21B43/26 ,  E21B47/101

    摘要： Methods and related systems are described for measuring acoustic signals in a borehole during a fracturing operation. The system includes a downhole toolstring designed and adapted for deployment in a borehole formed within a subterranean rock formation. A downhole rock fracturing tool opens and propagates a fracture in the subterranean rock formation. Dipole and/or quadrupole acoustic sources transmit acoustic energy into the subterranean rock formation. A receiver array measures acoustic energy traveling through the subterranean rock formation before, during and after the fracture induction. Geophones mounted on extendable arms can be used to measure shear wave acoustic energy travelling in the rock formation. The toolstring can be constructed such that the sources and receivers straddle the fracture zone during the fracturing. Alternatively, the sources or the receivers can co-located axially with the fracture zone, or the toolstring can be repositioned following fracturing such that the fracture zone is between the acoustic sources and receivers.

    摘要翻译： 描述了用于在压裂操作期间测量井眼中的声信号的方法和相关系统。 该系统包括设计并适于部署在形成于地下岩层内的钻孔中的井下工具串。 井下岩石压裂工具打开并传播地下岩层中的裂缝。 偶极和/或四极声源将声能传递到地下岩层中。 接收器阵列测量在断裂诱导之前，之中和之后穿过地下岩层的声能。 安装在可伸缩臂上的地震检波器可用于测量在岩层中行进的剪切波声能。 可以构造工具串，使得源和接收器在压裂期间跨越断裂带。 或者，源或接收器可以与断裂区域轴向共定位，或者在压裂之后可以重新定位工具串，使得断裂区域在声源和接收器之间。

    System and method for estimating subsurface principal stresses from seismic reflection data
    5.
    发明授权
    System and method for estimating subsurface principal stresses from seismic reflection data 有权
    用于从地震反射数据估计地下主应力的系统和方法

    公开(公告)号：US06714873B2

    公开(公告)日：2004-03-30

    申请号：US10023293

    申请日：2001-12-17

    申请人： Andrey Bakulin ,  Bikash K. Sinha ,  Romain Charles Andre Prioul

    发明人： Andrey Bakulin ,  Bikash K. Sinha ,  Romain Charles Andre Prioul

    IPC分类号： G01V100

    CPC分类号： G01V1/30

    摘要： A method and system is described for estimating stress characteristics from seismic data. The method includes receiving seismic data acquired over a region, receiving properties of rock at a location within the region, and estimating one or more stress characteristics for a sub-region by combining the seismic data and the rock properties using a relationship between the stress characteristics in the sub-region and elastic stiffness and/or sonic velocity in the sub-region. The relationship is based on a non-linear elasticity theory. The described system and method also includes analyzing in the seismic data azimuth and offset dependence of seismic signatures for seismic anisotropy thereby determining a set of anisotropic coefficients; identifying directions of minimum, intermediate and maximum stresses from orientation of principal axes of seismic anisotropy and signs of the anisotropic coefficients; and inverting the anisotropic coefficients thereby estimating magnitudes of principal stresses in the sub-region using non-linear elastic constants and vertical total stress information derived from the rock properties.

    摘要翻译： 描述了一种用于从地震数据估计应力特征的方法和系统。 该方法包括接收在一个区域上获取的地震数据，接收该区域内某一位置的岩石的性质，以及通过使用该地震数据和岩石性质之间的关系来估计一个或多个亚区域的应力特性 在子区域中的弹性刚度和/或声子速度。 关系是基于非线性弹性理论。 所描述的系统和方法还包括分析地震数据的方位角和偏移相关性的地震各向异性，从而确定一组各向异性系数; 识别地震各向异性主轴方向的最小，中等和最大应力方向以及各向异性系数的符号; 并且反转各向异性系数，从而使用从岩石性质导出的非线性弹性常数和垂直总应力信息来估计子区域中的主应力的大小。