Abstract Simulation wells with known parameters are vital in the study of anisotropic methods and logging equipment development. We propose a symmetrically partitioned isotropic (SPI) model, which can quantitatively control equivalent circumferential anisotropy. First, anisotropy flexural wave dispersion SPI model is analysed using perturbation method, azimuth characteristics velocity evaluated...

The study of rotary steering drilling technology is currently one of the hot topics in the drilling engineering field. It requires accurate well trajectory control instructions when rotary steerable tools are applied to achieve the well trajectory control goal. A drilling trajectory prediction model will benefit this progress. According to the continuous beam theory, a mechanical model of push-...

A mathematical model is constructed and computational experiments are performed to study the effect of anisotropy specific electrical conductivity soil on distribution electric magnetic fields generated by cathodic electrochemical corrosion protection stations underground main pipeline (MP). The variation depending azimuth angle rotation tensor containing analysed.

The work presented here describes a novel fracture characterization technique that utilizes azimuthal amplitude variations (AVAZ) present in 3D seismic data to deduce subsurface fracturing characteristics. We apply this technique to both synthetic data and real data from the Haynesville Shale. The method we propose is able to unambiguously invert for fracture azimuth, and does not suffer from a...

The anisotropy of magnetic susceptibility (AMS) of late Cretaceous ash-flow tuffs in Chisulryoung Volcanic Formation, southeastern Korea was studied to define the primary pyroclastic flow azimuth. AMS data revealed a dominant oblate fabric with a tight clustering of k3 (minimum axis of magnetic susceptibility) and shallow dispersal of k1 (maximum axis of magnetic susceptibility) and k2 (interme...

Observational results derived from the airborne Cband scatterometer RESSAC looking at small incidence angles (521”) were acquired in the vicinity of the Gulf Stream during the Surface Wave Dynamics Experiment in February and March 1991. Although the instrument was primarily designed to study the directional spectra of long waves, it is also possible to process the data to examine the behaviour ...

[1] We perform a time-lapse analysis of Rayleigh and Love wave anisotropy above an underground gas storage facility in the Paris Basin. The data were acquired with a three-component seismic array deployed during several days in April and November 2010. Phase velocity and back azimuth of Rayleigh and Love waves are measured in the frequency range 0.2–1.1 Hz using a three-component beamforming al...

[1] We report measurements of long-period P wave polarization (Ppol) in Australia and Tahiti made by combining modeling of the polarization deviation and harmonic analysis. The analysis of the deviation of the horizontal polarization of the P wave as a function of event back azimuth may be used to obtain information about (1) sensor misorientation, (2) dipping discontinuities, (3) seismic aniso...

[1] Shear wave splitting observed in microearthquake data at the axis of the Mid-Atlantic Ridge near 35 N has a fast polarization direction that is parallel to the trend of the axial valley. The time delays between fast and slow S wave arrivals range from 35 to 180 ms, with an average of 90 ms, and show no relationship with ray path length, source-toreceiver azimuth, or receiver location. The a...

[1] We studied the back azimuth dependence of Ps converted phases at GSN station COR (Corvallis, Oregon) using broadband P receiver functions computed from 602 teleseismic earthquakes. The amplitudes and polarities of the transverse Ps phases are largely two-lobed, which indicates anisotropy with a tilted symmetry axis. A double-peaked Ps conversion at 4.5–6.5 s delay has the moveout of a dippi...