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| Number | Title | Issue Date |
| 8165815 | Method for electromagnetic air-wave suppression by active cancellation and shielding Method for reducing air wave and/or magnetotelluric noise in controlled source electromagnetic surveying by either shielding the source (61) from the air interface, shielding the receivers from downward traveling electromagnetic energy, or by employing a seco... | 04/24/2012 |
| 8162297 | Diverse bubble size generation Method and apparatus for producing a bubble curtain with a diversity of bubble diameters for purposes such as suppressing surface-related multiple reflections in marine seismic surveys. Bubble generating elements are used that combine porous wall material with discr... | 04/24/2012 |
| 8126651 | Method for obtaining porosity and shale volume from seismic data Method for obtaining rock parameters such as porosity and vshale directly from inversion of seismic data corresponding to a single trace location. This method is distinguished from existing methods that obtain elastic properties from inversion of seismic data, then ... | 02/28/2012 |
| 8126650 | Method for determining physical properties of structures Method for efficient inversion of controlled-source electromagnetic survey data to obtain a resistivity model of the subsurface of the survey area. The method extracts the dimensions and location of sub-surface structures as they may be revealed by existing seismic ... | 02/28/2012 |
| 8126648 | Method for predicting the best and worst in a set of non-unique solutions Method for determining best and worst cases for values of model parameters such as porosity and shale volume fraction generated by non-unique matrix inversion of physical data such as seismic reflection amplitudes. The matrix is diagonalized, and then orthonormal ba... | 02/28/2012 |
| 8121792 | Integration of geomechanics and seismic analysis for passive seismic feasibility analysis One or more techniques for determining time-varying stress and strain fields within a subsurface region include integrating a seismic model (110) of a reservoir within the subsurface region with a geomechanical model (140) of the subsurface region. An ... | 02/21/2012 |
| 8121791 | Spectral shaping inversion and migration of seismic data A geophysical model of a subsurface region is generated based on seismic data, e.g., seismic reflection data. Migration and seismic inversion are applied to the seismic data to generate estimates of one or more physical or seismic properties of the subsurface region... | 02/21/2012 |
| 8121789 | Method for correcting the phase of electromagnetic data Method for identifying, determining and correcting source-related phase errors in data from a controlled source electromagnetic survey by using data from ordinary survey receivers, i.e. without benefit of source monitoring data. Abrupt anomalies indicating source ma... | 02/21/2012 |
| 8090539 | Method for spatial filtering of electromagnetic survey data The method for suppressing noise in the controlled seismic source electromagnetic survey data based on the frequency content of the noise (51) contained in the data. The invention recognizes that some data variations across bins cannot be attributed to resist... | 01/03/2012 |
| 8078439 | Method of imaging subsurface formations using a virtual source array This invention relates generally to a method of simulating the signal of an electromagnetic source using one or more dipole sources. In the method a dipole source is located at an excitation location corresponding to a segment of the electromagnetic source to be sim... | 12/13/2011 |
| 8073625 | Method for combining seismic data sets A method is disclosed for combining seismic data sets. This method has application in merging data sets of different vintages, merging data sets collected using different acquisition technologies, and merging data sets acquired using different types of sensors, for ... | 12/06/2011 |
| 8050867 | Data adaptive vibratory source acquisition method Method for conducting a seismic survey (23) wherein the acquisition parameters are modified as the survey progresses using information (24) from sensors located to monitor structures and fixtures located in the survey area. The sensor output is compare... | 11/01/2011 |
| 8027790 | Interpretation and mapping of electromagnetic survey data A structured computer-implemented method (1000) based on graphical user interfaces for interpretation and mapping of data from a controlled-source electromagnetic survey, featuring capability to store electromagnetic data in layers (1004), each layer h... | 09/27/2011 |
| 8014988 | Method for obtaining resistivity from controlled source electromagnetic data Method for generating a three-dimensional resistivity data volume for a subsurface region from an initial resistivity model and measured electromagnetic field data from an electromagnetic survey of the region, where the initial resistivity model is preferably obtain... | 09/06/2011 |
| 7979211 | Electromagnetic data processing system Method and computer program for accepting controlled-source electromagnetic (“CSEM”) source and receiver data (40) as time series, transforming these data into the time-frequency domain, and reducing these data and survey metadata to a form suitable for i... | 07/12/2011 |
| 7958939 | Composition and method for producing a pumpable hydrocarbon hydrate slurry at high water-cut Embodiments of the invention relate to a process for providing a pumpable hydrate slurry in a hydrocarbon pipeline fluid mixture having a water-cut greater than about 50 volume percent. In one or more embodiments the process comprises treating the fluid mixture with... | 06/14/2011 |
| 7933757 | Method for simulating and estimating sandstone properties The invention is a method for simulating sandstone deposition. The sandstone is simulated by estimating the grain size distribution and mineral composition of grains in the sandstone, simulating sedimentation of grains from the grain size distribution and mineral co... | 04/26/2011 |
| 7933741 | Estimating noise at one frequency by sampling noise at other frequencies A method, apparatus and computer program for improving the signal-to-noise ratio of a signal S(t), S(t) containing Signal and noise, are disclosed. A measurement of S(t) at a frequency-of-interest is obtained. Noise measurements of S(t) at one or more noise frequenc... | 04/26/2011 |
| 7925443 | Method for controlled source electromagnetic reconnaissance surveying Method for conducting an efficient and interpretable controlled-source electromagnetic reconnaissance survey for buried hydrocarbons. While a part of the survey area is being set up for measurement and data are being acquired, data from a nearby part of the survey a... | 04/12/2011 |
| 7904248 | Method for geologic modeling through hydrodynamics-based gridding (hydro-grids) A method of hydrodynamics-based gridding (Hydro-Grids) for creating geologic models of subsurface volumes, such as reservoirs, is disclosed. Geologic data is obtained. Vertical grid surfaces are created. Lateral grid surfaces are created to correspond to surfaces of... | 03/08/2011 |
| 7894989 | Method for determining earth vertical electrical anisotropy in marine electromagnetic surveys A method is disclosed for determining earth vertical electrical anisotropy from offshore electromagnetic survey measurements. The method requires both online and offline data, which includes at least one electromagnetic field component sensitive at least predominant... | 02/22/2011 |
| 7894299 | Converted mode seismic survey design Method for designing a converted mode (PS or SP) seismic survey to accomplish specified vertical and lateral resolution objectives at target depth. An equation (181) is provided for determining the minimum bandwidth required for a desired vertical resolution ... | 02/22/2011 |
| 7845407 | Profile control apparatus and method for production and injection wells Systems and associated methods for use in the production of hydrocarbons are described. The systems include a first tubular member and a second tubular member at least partially enclosing the first tubular member. Each of the first and second tubular members have a ... | 12/07/2010 |
| 7844430 | Reservoir model building methods Disclosed are various reservoir model generation methods. At least one of the methods includes providing a first framework having a plurality of cells, wherein the first framework is a reservoir framework and providing a second framework having a plurality of cells,... | 11/30/2010 |
| 7840356 | Method for determining receiver orientations Method for completely specifying orientation of electromagnetic receivers dropped to the ocean bottom in an electromagnetic survey. Survey data are selected, rejecting noisy data with long offsets and data where the receiver has saturated with short offsets (61 | 11/23/2010 |
| 7830744 | Method for determining reservoir permeability form borehole Stoneley-wave attenuation using Biot's poroelastic theory Method for determining reservoir permeability from Stoneley wave attenuation extracted from conventional sonic logs by inversion of the full Biot wave equations for a porous medium. Frequency-dependent Stoneley-wave attenuation is extracted by analyzing array sonic ... | 11/09/2010 |
| 7822562 | Removing air wave noise from electromagnetic survey data Method for removing air wave noise from shallow water controlled source electromagnetic survey data, using only the measured data and conductivity values for sea water (140) and air. The method is a calculation performed numerically on CSEM data and resulting... | 10/26/2010 |
| RE41829 | Nonlinear electroseismic exploration A method for seismic exploration using nonlinear conversions between electromagnetic and seismic energy, with particular attention to the electromagnetic source waveform used. According to the invention, seismic returns from a source waveform are correlated with a r... | 10/19/2010 |
| 7808420 | Electromagnetic imaging by four dimensional parallel computing Method for organizing computer operations on a system of parallel processors to invert electromagnetic field data (11) from a controlled-source electromagnetic survey of a subsurface region to estimate resistivity structure (12) within the subsurface r... | 10/05/2010 |
| 7805249 | Method for performing controlled source electromagnetic surveying with multiple transmitters Method for separating responses of multiple transmitters m a controlled source electromagnetic survey by using mutually orthogonal transmitter waveforms and transforming the combined response to the frequency domain (144) The mutual orthogonality can be based... | 09/28/2010 |
| 7801681 | Method for phase and amplitude correction in controlled source electromagnetic survey data The method for correcting the phase of measured electric signals or magnetic signals of field data from a controlled source electromagnetic survey (CSES) by comparing the measured field data corresponding to a selected frequency to the simulated data for various sig... | 09/21/2010 |
| 7792766 | Design of reconnaissance surveys using controlled source electromagnetic fields via probabilistic neural network Method for determining an expected value for a proposed reconnaissance electromagnetic (or any other type of geophysical) survey using a user-controlled source. The method requires only available geologic and economic information about the survey region. A series of... | 09/07/2010 |
| 7783462 | Reservoir evaluation methods Described herein are methods of evaluating reservoirs. At least one of the methods includes providing a three dimensional reservoir framework having a plurality of cells; assigning one or more constant reservoir property values to some or all of the cells to provide... | 08/24/2010 |
| 7769572 | Method of imaging subsurface formations using a virtual source array This invention relates generally to a method of simulating the signal of an electromagnetic source using one or more dipole sources. In the method a dipole source is located at an excitation location corresponding to a segment of the electromagnetic source to be sim... | 08/03/2010 |
| 7761270 | Computer system and method having a facility management logic architecture The invention relates to a computer system and method for simulating transport phenomena in a complex system. The computer system comprises a logic interface that enables a user of the computer system to dynamically construct logic to customize simulation of the phy... | 07/20/2010 |
| 7761237 | Method for quantification and mitigation for dip-induced azimuthal AVO This patent delineates methods for quantifying and mitigating dip-induced azimuthal AVO effects in seismic fracture detection using Azimuthal AVO analysis by accurately accounting for the divergence correction and azimuthal dependence of the reflection angle. Soluti... | 07/20/2010 |
| 7752023 | Method for enhancing production allocation in an integrated reservoir and surface flow system A method for enhancing allocation of fluid flow rates among a plurality of wellbores coupled to surface facilities is disclosed. The method includes modeling fluid flow characteristics of the wellbores and reservoirs penetrated by the wellbores. The method includes ... | 07/06/2010 |
| 7743006 | Bayesian network triads for geologic and geophysical applications A method and apparatus are disclosed for modeling a system to estimate values and associated uncertainties for a first set of variables describing the system. A second set of system variables is selected, where the second set is directly or indirectly causally relat... | 06/22/2010 |
| 7676349 | Integrated anisotropic rock physics model Method for constructing an integrated rock physics model that simulates both shale anisotropy and stress-induced anisotropy of clastic rocks. In the model, the total pore volume is divided into three parts according to the estimated shale volume and effective stress... | 03/09/2010 |
| 7573780 | Electrode configurations for suppression of electroseismic source noise Method for survey design including configuring electrodes to reduce near-surface noise in the seismic response from an electroseismic survey of a subterranean formation. Different embodiments of the invention include (1) selective measurement of the surface noise to... | 08/11/2009 |
