| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 367075000 | Shear wave | 16 |
| 20090003132 | Estimating and Using Slowness Vector Attributes in Connection with a Multi-Component Seismic Gather - A technique includes determining at least one attribute of a slowness vector associated with a seismic gather based on pressure data and an indication of particle motion that is measured by at least one seismic sensor while in tow. | 01-01-2009 |
| 20090097358 | Seismic Monitoring Of Heavy Oil - A method of monitoring heavy oil recovery in a hydrocarbon reservoir including the steps of obtaining a set of acoustic signals; deriving from the obtained signals a velocity model including shear and compressional velocities for at least a section of the reservoir; defining a relation relating shear and compressional velocities to at least one material parameter of the heavy oil; performing a reservoir treatment process; obtaining an in-situ or post-treatment set of acoustic signals; and deriving from the in-situ or post-treatment set of acoustic signals shear and compressional velocities and the at least one material parameter using the relation. | 04-16-2009 |
| 20090116338 | Identifying a stress anomaly in a subsurface region - A method for identifying a local stress anomaly in a subsurface region, which method comprises the steps of obtaining a model of the subsurface region, which model includes a salt layer in between adjacent layers; identifying a salt weld in the model; and attributing a stress anomaly to an area surrounding the salt weld. | 05-07-2009 |
| 20100020642 | ESTIMATING FORMATION STRESSES USING RADIAL PROFILES OF THREE SHEAR MODULI - Maximum and minimum horizontal stresses, and horizontal to overburden stress ratio, are estimated using radial profiles of shear moduli. Inversion enables estimation of maximum and minimum horizontal stresses using radial profiles of three shear moduli associated with an orthogonal set of axes defined by the three principal stress directions. Differences in the far-field shear moduli are inverted together with two difference equations obtained from the radial profiles of the dipole shear moduli C | 01-28-2010 |
| 20100103774 | VSP IMAGING OF ACOUSTIC INTERFACES - A method to generate images of acoustic contrasts for structures located between at least one acoustic source and at least one receiver, said structures converting a part of the compressional energy to shear. | 04-29-2010 |
| 20100135115 | MULTIPLE ANISOTROPIC PARAMETER INVERSION FOR A TTI EARTH MODEL - A method for determining values of anisotropic model parameters of a Tilted Transversely Isotropic (TTI) Earth model, the anisotropic parameters including P-wave velocity (Vp | 06-03-2010 |
| 20110007605 | MEASUREMENT METHOD FOR A GRANULAR COMPACTION PILE USING CROSSHOLE SEISMIC TESTING - A measurement method for a granular compaction pile | 01-13-2011 |
| 20110134722 | Simultaneous Joint Inversion of Surface Wave and Refraction Data - A technique includes a method and apparatus for simultaneous joint inversion of surface wave and refraction data to identify near surface geophysical and geological properties. | 06-09-2011 |
| 20110182144 | METHODS AND SYSTEMS FOR ESTIMATING STRESS USING SEISMIC DATA - A method for estimating principal stresses of a subterranean formation from seismic data. In one embodiment, rock strength parameters from seismic data of the formation is first determined to calculate the anisotropic elastic properties of the formation. The three principal stresses of the formation: vertical stress, minimum horizontal stress, and maximum horizontal stress, is determined using at least the calculated anisotropic elastic properties and the rock strength parameters of the formation. From the estimated principal stresses, the differential ratio of the maximum and minimum horizontal stresses can be determined to indicate optimal zones for hydraulic fracturing. In another embodiment, a tectonic strain term is introduced to calibrate the estimated principal estimated stress to a known reference point. In yet another embodiment, hoop stress is incorporated to estimate the fracture initiation pressures. | 07-28-2011 |
| 20120002505 | METHOD AND APPARATUS FOR SEPARATING AND COMPOSING SEISMIC WAVES - An approach is provided for a multi-component seismic data processing that separates P-type and S-type seismic waves in an affine coordinate system. A method for separating and composing seismic waves comprises: determining base vectors of the seismic waves; transforming and separating the seismic wave in an affine coordinate system; and obtaining a signal with true amplitudes and eliminating a mode leakage phenomenon. Therefore, the method achieves the wave separation and recovers the amplitudes of separated waves simultaneously, which reduces noises to provide more precisely seismic data and to satisfy the requirement of seismic data analysis and processing. | 01-05-2012 |
| 20120236687 | Directional Seismic Sensor Array - A vibration sensor system for contacting the surface of a solid medium for detecting horizontally polarized shear waves and compressional waves. At least two contact points interface between a vibration sensor array and the solid medium to provide uninterrupted contact with the medium during detection of dynamic motions in the medium. A single vibration sensor is mounted on at least two adjacent contact points to convert detected dynamic motions to corresponding electrical signals. The single vibration sensor mounted on the two adjacent contact points forms a sub-array. The vibration sensor system has at least two sub-arrays. A conditioning and combining member treats sensor electrical signals from at least two sub-arrays to form a composite output signal for the system. | 09-20-2012 |
| 20120269035 | Evaluating Prospects from P-Wave Seismic Data Using S-Wave Vertical Shear Profile Data - The present disclosure relates to methods and systems for evaluating potential hydrocarbon prospect locations within a subsurface formation. First and second opposite polarity directional seismic signals are propagated from a seismic source through the subsurface formation and recorded. A pure shear wave record is derived from the recorded signals and compared to a compression wave record for at least one potential hydrocarbon reservoir location within the formation. | 10-25-2012 |
| 20130121112 | METHOD FOR ESTIMATING ELASTIC PARAMETERS THROUGH INVERSION OF 4D SEISMIC MEASURES - A 4D seismic technique, where a base seismic trace is measured at a first time in a region of the subsoil, and then a monitor seismic trace corresponding to the base seismic trace is measured at a second time. To interpret the 4D measurements, assumptions are made about the variation of elastic parameters in permeable layers at predefined positions in one direction between the first and the second time. Elastic parameters include the density (ρ) and the speed of propagation of the pressure waves (V | 05-16-2013 |
| 20130176823 | SIMULTANEOUS JOINT ESTIMATION OF THE P-P AND P-S RESIDUAL STATICS - Methods and systems for estimating the residual static terms for multi-component land datasets are described. A one-pass estimation simultaneously using P-P pre-stack data and P-S pre-stack data for generating common source residual statics for the P-P data and the P-S data and separate receiver residual statics for the P-P data and the P-S data. A series of iterations are performed using either a linear or a non-linear simulation to converge on acceptable residual statics. | 07-11-2013 |
| 20130201795 | FRACTURE IDENTIFICATION FROM AZIMUTHAL MIGRATED SEISMIC DATA - A method is described for identifying anisotropic regions in unconventional hydrocarbon reservoirs, such as in shale formations. Anisotropy can be indicative of a zone of fracturing, which may represent a “sweet spot” for drilling a productive well. Seismic amplitude data from receivers is recorded along two orthogonal lines radiating from a seismic source. After time-migration, the equations for each orthogonal direction may be summed to obtain values for A and (B | 08-08-2013 |
| 20140010046 | Method to Separate Compressional and Shear Waves During Seismic Monitoring by Utilizing Linear and Rotational Multi-Component Sensors in Arrays of Shallow Monitoring Wells - The present invention provides a technique to separate compressional seismic waves from shear seismic waves and to determine their direction of propagation to enhance the seismic monitoring oil and gas reservoirs and the seismic monitoring of hydrofracturing in oil and gas wells. The invention utilizes various combinations of multi-component linear seismic sensors, multi-component rotational seismic sensors, and pressure sensors. Sensors are jointly deployed in arrays of shallow monitoring wells to avoid the complicating effects of the free surface of the earth. The emplacement of sensors in the shallow monitoring wells may be permanent. The method has a wide range of application in oil and gas exploration and production. This abstract is not intended to be used to interpret or limit the claims of this invention. | 01-09-2014 |
