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| Number | Title | Issue Date |
| 7986587 | Method for imaging the earth's subsurface using passive seismic sensing A method of imaging the Earth's subsurface using passive seismic emissions includes detecting seismic signals originating from within the Earth's subsurface over a selected time period using an array of seismic sensors deployed proximate the Earth's surface. Hypocen... | 07/26/2011 |
| 7843766 | Systems and methods for monitoring time-dependent subsurface changes Systems and methods for monitoring time-dependant subsurface changes from imperfectly repeated data measurements. ... | 11/30/2010 |
| 7751278 | Fault filter for seismic discontinuity data Various methods are disclosed for identifying faults in a seismic data volume. In some method embodiments, the fault identification method comprises determining a planarity value for each of multiple positions of an analysis window in the data volume. The planarity ... | 07/06/2010 |
| 7729201 | Method and apparatus for spread spectrum distance and velocity profile measurement A method and apparatus for spread spectrum distance and for spread spectrum velocity profile measurement is provided where the short pulse of traditional ultrasonic and radar level gauges is replaced by low peak power direct sequence spread spectrum (DSSS) modulated... | 06/01/2010 |
| 7660198 | Passive seismic event detection A method of identifying passive seismic events in seismic data that contains at least first seismic data traces acquired at a first seismic receiver and second seismic data traces acquired at a second receiver spatially separated from the first receiver comprises de... | 02/09/2010 |
| 7660199 | Microseismic event detection and location by continuous map migration The present invention provides methods and systems for microseismic hydraulic fracture monitoring in real-time. The methods and systems of the present invention may include continuous map migration of recorded microseismic signals. The methods and systems provide ro... | 02/09/2010 |
| 7656748 | Method of determining impulse responses from a medium in relation to the transmission of waves between different points The invention relates to a method of determining impulse responses from a medium (2) in relation to the transmission of waves between different points (T1-TN). The inventive method consists in: transmitting waves in the medium by generating, at each po... | 02/02/2010 |
| 7492665 | Seismic data acquisition and source-side derivatives generation and application The technologies described herein include systems and methods for encoding/decoding seismic sources and responses, generating and using of source-side derivatives while also generating and using the conventional source response. Sources in an array may be encoded su... | 02/17/2009 |
| 7391675 | Microseismic event detection and location by continuous map migration The present invention provides methods and systems for microseismic hydraulic fracture monitoring in real-time. The methods and systems of the present invention may include continuous map migration of recorded microseismic signals. The methods and systems provide ro... | 06/24/2008 |
| 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 |
| 7376046 | Method of seismic surveying The present invention provides a seismic surveying method in which vibrators in a first vibrator group are actuated at time T0 and vibrators in a second vibrator group are actuated at time T1, where T0 | 05/20/2008 |
| 7356410 | Method for the detection and exploration of subterranean hydrocarbon deposits by receivers of acoustic waves in a frequency range from 0.2 to 30 Hz The invention relates to a method for the detection and exploration of subterranean hydrocarbon deposits by receivers of acoustic waves in a frequency range from 0.2-30 Hz arranged at or near the surface, whereby, according to the invention, acoustic signals are rec... | 04/08/2008 |
| 7310580 | Method for borehole measurement of formation properties The present invention is a method of estimating formation properties by analyzing acoustic waves that are emitted from and received by a bottom hole assembly. A bottom hole assembly may be deployed in a borehole to estimate formation properties. From the bottom hole... | 12/18/2007 |
| 7310285 | Method for characterizing shear wave formation anisotropy A method of characterizing shear wave anisotropy in a formation includes obtaining crossed-dipole waveforms from a borehole penetrating the formation over a range of depths and frequencies, determining far-field slowness in a fast-shear and slow-shear direction usin... | 12/18/2007 |
| 7266041 | Multi-attribute background relative scanning of 3D geophysical datasets for locally anomaluous data points Methods for scanning geophysical data sets to find geological entities with specific geophysical responses entail selecting a focus sub-volume and a background sub-volume proximal to the focus sub-volume. The sub-volumes include discrete sampling locations and are l... | 09/04/2007 |
| 7260021 | Method of harmonic noise attenuation in correlated sweep data The present invention provides a method for harmonic noise attenuation in correlated sweep data in seismic exploration. The method includes forming a plurality of correlation data subsets using a plurality of sweep data sets and a correlation reference sequence. The... | 08/21/2007 |
| 7209407 | Seismic data acquisition system A seismic survey system having remote acquisition modules (RAMs) for acquiring seismic signals and communicating with a central recording system (CRU) via a network of cables, other RAMs, and line tap units (LTUs), arranged in a matrix of receiver lines and base lin... | 04/24/2007 |
| 7158446 | Directional acoustic telemetry receiver Acoustic telemetry devices and methods that provide directional detection. In one embodiment, a disclosed acoustic telemetry device comprises at least two acoustic sensors and an electronics module. A first of the acoustic sensors detects a communication signal that... | 01/02/2007 |
| 7085195 | Method for detecting earth formation fractures by seismic imaging of diffractors A method is disclosed for seismic imaging of subsurface diffractors. The method includes performing migration velocity analysis on a seismic time record section and depth migrating the time section for offsets exceeding one-half a distance between a seismic energy s... | 08/01/2006 |
| 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 |
| 7046581 | Well-to-well tomography A method of obtaining a spatial model of a property of part of a subsurface formation located between underground seismic receivers in which at least two sets of pairs of seismic receivers are utilized and one pair of receivers is used to record a signal from a seim... | 05/16/2006 |
| 7027929 | Seismic data interpolation system Seismic traces of 3D surveys are interpolated using polynomials in 4D space from a less densely sampled real data set of source points S(x,y) and receiver points R(x,y). Input seismic traces should be pre-processed by normal move out (NMO) and static corrections. In... | 04/11/2006 |
| 7013218 | System and method for interpreting repeated surfaces A method of managing a repeated surface comprising seismic data as one surface is disclosed where a plurality of horizons is analyzed and a determination made as to which of the plurality of horizons comprise a repeated surface. Those horizons which comprise the rep... | 03/14/2006 |
| 6961673 | Measuring discontinuity in seismic data Various methods for measuring continuity and discontinuity of a seismic data set. One method embodiment includes: a) detecting seismic energy with an array of detectors; b) converting detection signals from the array of detectors into data representing one or more a... | 11/01/2005 |
| 6941226 | Method for determining, recording and sending GPS location data in an underwater environment Underwater position determination is provided by combining sonar-derived ranging data between a sonar receiver and a sonar transmitter with GPS position data to provide geographically-referenced position data accurately representing the position of a sonar receiver ... | 09/06/2005 |
| 6941227 | Frequency-dependent processing and interpretation (FDPI) of seismic data for identifying, imaging and monitoring fluid-saturated underground reservoirs A method for identifying, imaging and monitoring dry or fluid-saturated underground reservoirs using seismic waves reflected from target porous or fractured layers is set forth. Seismic imaging the porous or fractured layer occurs by low pass filtering of the window... | 09/06/2005 |
| 6898147 | System for estimating azimuthal variations in seismic data The invention comprises a system for processing seismic data to estimate time shift resulting from velocity anisotropy in the earth's subsurface. A gather of seismic data traces is formed and selected seismic data traces included in said gather within selected time ... | 05/24/2005 |
| 6868037 | Use of drill bit energy for tomographic modeling of near surface layers A method for tomographic modeling of seismic wave travel times from well drilling records generated by drill string vibrations during drilling and identifying in the recorded vibration at least one of direct, reflected, refracted, converted and diving waves so as to... | 03/15/2005 |
| 6859416 | Apparatus and method for analyzing correlation between geophysical data and seismic data, geophysical data monitoring apparatus and method, and earthquake monitoring method The present invention relates to an apparatus and a method for analyzing the correlation geophysical data and seismic data, physical data monitoring apparatus and method, and an earthquake monitoring method. ... | 02/22/2005 |
| 6791900 | Method of calculating a throw volume for quantitative fault analysis A method of calculating a throw volume corresponding to a seismic data volume. A range of time shifts and a search direction for the seismic data volume are selected. A data location separation and a vertical time window are also selected. A cross-correlation is cal... | 09/14/2004 |
| 6757217 | Method for time-aligning multiple offset seismic data volumes Near-offset and far-offset seismic data volumes are time-aligned by first selecting a plurality of time shifts. The near-offset and far-offset seismic data volumes are cross-correlated at the plurality of time shifts. An initial time-shift volume and a maximum corre... | 06/29/2004 |
| 6747914 | Use of minor borehole obstructions as seismic sources An acoustic system and method for monitoring a hydrocarbon reservoir. Wellbore tube wave energy may be created by natural or ambient sources or tube waves may be excited intentionally. Wellbore tube wave energy is converted to seismic body wave energy at minor boreh... | 06/08/2004 |
| 6704245 | Seismic prospecting method and device using simultaneous emission of seismic signals obtained by coding a signal by pseudo-random sequences Seismic prospecting method and device using simultaneous emission of seismic signals obtained by coding a signal by pseudo-random sequences, and notably a periodic signal phase modulated by such sequences. Signals such as, for example, periodic signals phase m... | 03/09/2004 |
| 6658362 | Method and apparatus for testing components A method and apparatus for testing components is disclosed. The method involves a system operating to collect data in a certain frequency range, and utilizing signals outside that frequency range to test the system during operation. Such testing may be co... | 12/02/2003 |
| 6631783 | Mapping reservoir characteristics using earth's nonlinearity as a seismic attribute This invention relates to mapping the hydrocarbon reservoir characteristics by mapping the reservoir formations that display dynamic elastic nonlinearity responses to the seismic signals. The main reason of this nonlinear behavior in the reservoir rocks i... | 10/14/2003 |
| 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 |
| 6418079 | Method of reducing harmonic interference while using overlapping source point seismic recording techniques Segmenting the spectral distribution of overlapped vibratory signals improves the efficiency of data acquisition while providing reduced harmonic distortion in the time zones of interest. Two identical sweep segments are used. Each sweep segment includes ... | 07/09/2002 |
| 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 |
| 6055213 | Subsurface well apparatus Method and apparatus for actuating one or more downhole well tools carried by a production or workstring conduit having an imperforate wall and for blocking fluid communication between an activating fluid body and a second fluid source within said well ac... | 04/25/2000 |
| 6028821 | Process for separating waves in borehole seismics for walkway-type acquisitions A process for separating waves in borehole seismics for walkaway-type acquisitions. Waves are generated in a medium from several positions of a source. The waves are received at at least three sensors along axes V, H1, H2. Collection... | 02/22/2000 |
