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| Number | Title | Issue Date |
| 7388811 | Method for separating microseismic signals from seismic signals emitted by one or several sources This invention is a method of separating induced microseismicity signals from seismic signals acquired within active seismic monitoring operations carried out in underground zones under development which has application for monitoring of underground hydrocarbon or f... | 06/17/2008 |
| 7295490 | System and method of phase encoding for high fidelity vibratory seismic data In accordance with the present invention, there is provided a method of determining whether a particular high fidelity vibratory seismic survey phase encoding is likely to be a good one based on an analysis of the eigenvalue structure (i.e., eigenvalues, eigenvalue ... | 11/13/2007 |
| 7283911 | System and method for interpreting reverse faults and multiple z-valued seismic horizons A system and method for interpreting reverse faults and multiple z-valued seismic horizons. A platform executable on a computer is provided for interpreting seismic data. The platform includes a user input module for accepting user inputs related to interpretation o... | 10/16/2007 |
| 7248539 | Extrema classification A method for automated extraction of surface primitives from seismic data is presented. A preferred embodiment of the method includes defining, typically with sub-sample precision, positions of seismic horizons through an extrema representation of a 3D seismic input... | 07/24/2007 |
| 7230878 | Methods and apparatus for seabed seismic data acquisition Methods and apparatus for acquiring seismic data using a seabed seismic data cable positioned on a seabed are described, one method including deploying a seabed seismic cable, the cable comprising two or more active sections separated by at least one jumper section;... | 06/12/2007 |
| 7092824 | Methods and systems for interactive investigation of geophysical data Methods and systems are provided for investigating an image set of geophysical data distributed over a first N-dimensional volume where N≧2. A subvolume that encloses a known feature of interest within a target set of geophysical data distributed over a second N-d... | 08/15/2006 |
| 7082367 | Seismic data calibration using crossplotted AVO attributes Disclosed herein are systems and methods for calibrating seismic data using seismic attribute pairs such as amplitude versus offset (AVO) attributes. In one embodiment, a method includes: receiving traces from a seismic survey that covers a volume; determining a pai... | 07/25/2006 |
| 7069149 | Process for interpreting faults from a fault-enhanced 3-dimensional seismic attribute volume A computer implemented method for interpreting faults from a fault-enhanced 3-D seismic attribute cube. The method includes the steps of extracting faults from a 3-D seismic attribute cube, and of calculating a minimum path value for each voxel of the 3-D seismic at... | 06/27/2006 |
| 7051808 | Seismic monitoring of in situ conversion in a hydrocarbon containing formation In an embodiment, a system may be used to heat a hydrocarbon containing formation. The system may include a conduit placed within an opening in the formation. A conductor may be placed within the conduit. The conductor may provide heat to a portion of the formation.... | 05/30/2006 |
| 7050356 | Method of seismic surveying A method of seismic surveying comprising the steps of actuating the or each vibrator in a first vibrator group at time T0, and subsequently actuating the or each vibrator in a second vibrator group at time T1 that satisfies T0 | 05/23/2006 |
| 7020045 | Block and module for seismic sources and sensors The invention relates to a source block with a downhole seismic source for use in seismic acquisition during production, comprising: a device for locking the block in a first position spaced from the well casing, a device for releasing the ... | 03/28/2006 |
| 6954403 | Concurrent phase angle graphic analysis Waveform data, such as reflection seismic data, is filtered by concurrently analyzing various phase angles of the data. The various phase angles of the data are compared to phase rotated background trends and the phase angle producing the maximum deviation from the ... | 10/11/2005 |
| 6950751 | Method and apparatus for the assimilation and visualization of information from 3D data volumes The present invention provides a method and apparatus for displaying selected characteristics of geological features. Color-features, for example, hue, saturation and intensity, or other use selected color-features, are assigned to represent different attribute valu... | 09/27/2005 |
| 6941228 | Method and system and program storage device for analyzing compressional 2D seismic data to identify zones of open natural fractures within rock formations The Fracture Trend Identification method is practiced by the Fracture Trend Identification software adapted for analyzing compressional 2-D seismic data in order to identify zones in a rock formation containing open, natural fractures. The Fracture Trend Identificat... | 09/06/2005 |
| 6935424 | Mitigating risk by using fracture mapping to alter formation fracturing process A formation fracturing method with which to mitigate risk to hydrocarbon productivity includes pumping fracturing fluid, during at least part of a fracturing job time period, into a well to fracture a formation; generating signals, within the fracturing job time per... | 08/30/2005 |
| 6612398 | Methods for measurement, analysis and assessment of ground structure For determination of the laminar structure and other characteristics of a ground, oscillation sensors for detecting the vertical component or vertical and horizontal components of oscillations are disposed at three or more points within a comparatively sm... | 09/02/2003 |
| 6253870 | Methods for measurement, analysis and assessment of ground structure For determination of the laminar structure and other characteristics of a ground, oscillation sensors for detecting the vertical component or vertical and horizontal components of oscillations are disposed at three or more points within a comparatively sm... | 07/03/2001 |
| 6049508 | Method for seismic monitoring of an underground zone under development allowing better identification of significant events The invention is a method for facilitating discrimination and identification of seismic or microseismic events by means of permanent pickups in an underground zone under development. The method comprises permanent installation of, in one or more wells, el... | 04/11/2000 |
| 6041018 | Method for correcting amplitude and phase differences between time-lapse seismic surveys The present invention relates to a time-lapse or 4-D seismic data processing method in which cross-correlation of trace information in a series of time-lapse seismic images is used to distinguish one source of noise from another source of noise. After a s... | 03/21/2000 |
| 6018495 | Method of borehole compensation of earth formation characteristic measurements using depth measurements A method is disclosed for borehole compensation of measurements of earth formations penetrated by a borehole including differential time (Ɗt) measurements obtained from a borehole tool in the formation. The borehole tool includes at least one transmitter... | 01/25/2000 |
| 6014344 | Method for enhancing seismic data A method for enhancing zero-phase seismic data traces so that subtle geologic features are easier to identify and interpret. In a first embodiment, the method comprises enhancing the amplitudes of at least the peaks and troughs in the zero-phase seismic d... | 01/11/2000 |
| 5946271 | Calibration system for use in time lapse tomography A discrete, minimally-equipped standard seismic calibration system is permanently installed over a subsurface reservoir structure that contains fluids of economic interest. Changes in the fluid content as a function of long-term time lapse may introduce c... | 08/31/1999 |
| 5933789 | Method and system for applying dispersive normal moveout corrections to seismic survey signals A method and computer system for deriving and applying normal moveout phase and time shift corrections to seismic survey traces is disclosed. Normal moveout time-shift corrections are first applied to traces in a common midpoint (CMP) or common depth poin... | 08/03/1999 |
| 5825716 | Method of reverberation removal from seismic data and removal of dual sensor coupling errors A method for eliminating the influence of multiple reflections in seismic data by determining an up going and down going vector wave-field from the vector wave-field, determining a product of the free surface refection coefficient and the down going vecto... | 10/20/1998 |
| 5822269 | Method for separation of a plurality of vibratory seismic energy source signals A method for separating and pre-processing vibratory source data includes varying the phase of vibratory sources according to two patterns. A first pattern is used for odd numbered sources while a second pattern is used for even numbered sources. Each pat... | 10/13/1998 |
| 5790473 | High fidelity vibratory source seismic method for use in vertical seismic profile data gathering with a plurality of vibratory seismic energy sources A method for recording and pre-processing vertical seismic profile high fidelity vibratory seismic data includes the steps of measuring the motion of the vibrator which is related to the vibrator applied force times a transfer function of minimum phase, c... | 08/04/1998 |
| 5781503 | Method for attenuating surface wavetrains in seismic data A method for attenuating source-generated surface wavetrains in a set of seismic data traces. According to the method, the seismic data traces are Fourier transformed with respect to time to determine the frequency components of the surface wavetrain. A p... | 07/14/1998 |
| 5724309 | Method for geophysical processing and interpretation using instantaneous phase and its derivatives and their derivatives A method for utilizing instantaneous phase and the derivatives of instantaneous phase as display and/or plot attributes for seismic reflection data processing and interpretation for two-dimensional and three-dimensional seismic data. The spatial frequency... | 03/03/1998 |
| 5715213 | High fidelity vibratory source seismic method using a plurality of vibrator sources A method for recording and pre-processing high fidelity vibratory seismic data includes the steps of measuring the motion of the vibrator which is related to the vibrator applied force times a transfer function of minimum phase, causal, linear system rela... | 02/03/1998 |
| 5550786 | High fidelity vibratory source seismic method A method for recording and pre-processing high fidelity vibratory seismic data includes measuring the motion of the vibrator which is related to the vibrator applied force times a transfer function of minimum phase, causal, linear system relating the actu... | 08/27/1996 |
| 5461594 | Method of acquiring and processing seismic data recorded on receivers disposed vertically in the earth to monitor the displacement of fluids in a reservoir A method of acquiring and processing seismic data for repetitive monitoring of displacement of fluids impregnating a reservoir deep in the sub-surface below the surface weathered zone comprises the steps of: making at each point of a predetermined grid on... | 10/24/1995 |
| 5361239 | Compensation method using a single transmitter measurement tool A method for borehole compensation using a single transmitter measurement electromagnetic propagation tool is disclosed. Phase shift and attenuation are measured at each of three positions relative to a measurement depth. The measurements are used to calc... | 11/01/1994 |
| 5132938 | Adjusting seismic data to tie to other data A method to adjust a common subsurface feature on seismic traces associated with line misties is provided so that the seismic traces are consistent about the common subsurface feature. The method uses traces which are uniquely located in an x-y coordinate... | 07/21/1992 |
| 5123750 | Gas thermometer A gas thermometer has a case with a case end section (10) made of metal of good thermal conductivity and a main case section (14) made of material of poor thermal conductivity. By means of separating walls (46, 48, 62, 64, 70) and reflector walls (66, 68)... | 06/23/1992 |
| 5077697 | Discrete-frequency multipole sonic logging methods and apparatus The present invention offers methods and apparatus for sonic borehole logging of formation shear using discrete frequency measurements. A multipole source transducer emits sonic energy at a location in a borehole of at least one discrete frequency which i... | 12/31/1991 |
| 4982381 | Method and device for acquiring and processing signals obtained in wells and particularly in horizontal wells A method is disclosed for acquiring and processing logs obtained by a well-logging tool moved in a well, providing better discrimination between the discontinuities of the sub-soil oriented substantially in the same direction as the well and situated on e... | 01/01/1991 |
| 4982374 | Method of source coding and harmonic cancellation for vibrational geophysical survey sources A method is provided for significantly reducing the distortion and crossfeed from any selected order harmonic for any number of vibratory seismic sources operated concurrently, at the same time providing for separation of the signals from the different so... | 01/01/1991 |
| 4964102 | Method for enhancing and evaluating seismic data A method is provided for enhancing processing and evaluating seismic data. More particularly, a novel method is described for enhancing and evaluating common depth point seismic data. Common depth point (CDP) gathers of seismic signals are processed to su... | 10/16/1990 |
| 4945519 | Method of geophysical exploration A geophysical method of exploration including processing and displaying seismic data so as to enhance geophysicists' ability to evaluate and interpret subtle variations in the earth's geological and lithological structure. In particular, an exponentiated ... | 07/31/1990 |
| 4899321 | Method and apparatus for determining the source signature of land vibrators Methods and apparatus for processing vibrative seismic data. Baseplate phaselock vibrative energy, reaction mass phaselock vibrative energy and ground force phaselock vibrative energy are transmitted into the earth using a land vibrator and the reflection... | 02/06/1990 |
