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9019115 Warning horn control system, radar system, and method  
There is provided a radar system that includes an emitter system (e.g., an antenna), configured to emit electromagnetic pulses and detect electromagnetic pulses, and a reflection target, placed...
8982668 Semiconductor device and method of forming same for correlation detection  
In an embodiment a semiconductor device correlates a received signal with a known pattern. A correlation output is used as a basis for forming a confidence reference level. The confidence...
8838392 Noise attenuation in passive seismic data  
Passive seismic data is collected from measurements of seismic sensors in respective sensor assemblies, where the passive seismic data is based on measurements collected during periods when no...
8781749 Attenuating noise in seismic data  
Noise may be filtered or attenuated from seismic data by building a four-dimensional volume using the acquired seismic data and then applying a random noise attenuation filter to the...
8681911 Identification signal analyzing apparatus and method for compensating for separation and attenuation of channel profile  
Provided is an identification signal analyzing apparatus and method for compensating power of a channel profile occurring at a conventional identification signal analyzing apparatus by using a...
8611185 Antenna for seismic survey with uniform spatial sampling in wavelength  
The present invention concerns a method and an antenna for active and/or passive seismic survey, such as a particular geometric layout of a plurality of vibration sensors, each one of adequate...
8553496 Seismic source separation  
Seismic acquisition systems are disclosed that allow contemporaneous seismic sources to be separated from a composite signal comprising two or more constituent seismic sources. In some...
8331192 Seismic data acquisition and source-side derivatives generation and application  
The technologies described herein include systems and methods for performing a first seismic survey and performing a second seismic survey after a predetermined amount of time has lapsed between...
8218394 Method for imaging the earths subsurface using passive seismic interferometry and adaptive velocity filtering  
A method of imaging the Earth's subsurface using passive seismic interferometry tomography includes detecting seismic signals from within the Earth's subsurface over a time period using an array...
8139441 Method for bispectral picking of anelliptical NMO correction parameters  
Method of determining the velocity V and anellipticity η parameters for processing seismic traces in a common midpoint (CMP) gather comprising:—a preliminary step to define a plurality of nodes...
8064500 Correlation calculation control circuit and correlation calculation control method  
A coherent integration section synthesizes an IF signal stored in a memory and a C/A code replica generated by a code generation section using a mixer to calculate a correlation value, and...
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...
7843766 Systems and methods for monitoring time-dependent subsurface changes  
Systems and methods for monitoring time-dependant subsurface changes from imperfectly repeated data measurements.
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...
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...
7672194 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,...
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...
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:...
7646673 Wave analysis using phase velocity processing  
A method and apparatus for processing acoustic data recorded by a subterranean receiver array. The method includes emitting an acoustic signal into a formation, receiving the signal after it...
7616525 Method and apparatus for attenuation wind noise in seismic data  
A method and apparatus for use in seismic prospecting are disclosed. The method includes: attenuating coherent noise in a seismic data set generated from a sweep signal; and correlating the...
7508733 High-frequency processing of seismic vibrator data  
A method of processing seismic data obtained using a seismic vibrator that includes estimating travel times of direct wave arrivals between the seismic vibrator and an array of seismic receiver...
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...
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...
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...
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...
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,...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
6026058 Method for sorting seismic data  
An improved method for gathering traces in a 3-D seismic survey is disclosed. In one configuration, receiver lines having equally spaced geophone receivers stations are run in one direction, and...
6023444 Method and device for the acquisition of signals while drilling  
The present invention relates to a method for the acquisition of signals during a well drilling operation, wherein the following stages are carried out: shakes are generated by means of a...
5999487 Seismic reflection data acquisition and processing method and device for prospecting in tectonically complex environments  
A seismic reflection data acquisition and processing method and device for prospecting in tectonically complex environments are disclosed. In particular, the seismic reflection data acquisition...
5991235 Seismic data imaging system  
A system for seismic prospecting by using reflections of acoustic waves and an operation method thereof. Unprocessed raw data from a plurality geophone sensors and other processed data are stored...
5585556 Method and apparatus for performing measurements while drilling for oil and gas  
A method and equipment are described for performing measurements while drilling for oil or gas, in particular VSP-measurements employing a seismic source together with sensors such as hydrophones...
5511038 Process and device for detecting seismic signals in order to obtain vertical seismic profiles during bore drilling operations  
A process for preparing vertical seismic profiles (VSP) by bore drilling using, as the seismic source, the vibrations generated by the drilling bit. A cross-correlation between the bit signal and...
5511040 Method for calculating the optimum vibrator spacing for ground roll reduction  
A method for increasing the signal-to-coherent-noise ratio of seismic signals propagating along multi-azimuthal trajectories by abating Rayleigh wave contamination. A plurality of seismic...
5467320 Acoustic measuring method for borehole formation testing  
An acoustic formation apparatus is set forth. It utilizes the drill bit on a drill stem as the acoustic source. At a common azimuth and spaced vertically along the drill stem, first and second...
Matches 1 - 50 out of 187 1 2 3 4 >