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6501703 Static correction method for exploration seismic data using first arrivals of seismic waves  
A shorter spatial wavelength static correction method for exploration seismic data using first arrivals according to the invention includes the steps of: based on a quadratic curve fitting to the...
6477112 Method for enhancing resolution of earth formation elastic-wave velocities by isolating a wave event and matching it for all receiver combinations on an acoustic-array logging tool  
Acoustic logging data are obtained using a logging tool including at least on transmitter and a plurality of receivers. A waveform matching inversion is performed to obtain formation slowness...
6388947 Multi-crosswell profile 3D imaging and method  
Characterizing the value of a particular property, for example, seismic velocity, of a subsurface region of ground is described. In one aspect, the value of the particular property is represented...
6212477 Converted-wave analysis system and method  
Method and systems are provided for processing c-wave data resulting in less sensitivity to errors in p-wave velocity analysis. Therefore, according to one aspect of the invention, a process is...
6201765 Method of monitoring quality of seismic data processing and method of processing vertical seismic profile data  
The processing of surface seismic data may be monitored where vertical seismic profile data are available for the same region. A trace (45) of the vertical seismic profile data recorded from a...
6192316 Fracture discrimination using borehole frequency response of stoneley waves  
A computer system (30) and method of operating the same to analyze well log data so as to distinguish fractures from drilling artifacts, such as caves, washouts, and breakouts, is disclosed....
6152256 Method for controlling seismic vibrator ground forces  
A method used for controlling vibrator ground force output from a seismic vibrator and reducing potential damage to nearby structures. The method may be applied to any type of seismic vibrator for...
6091669 Method of determining, displaying and using the relative changes of elastic modulus and density of underground rock  
The general object of the present invention is to provide a method for determining and displaying the relative changes of elastic moduli and that of density of geologic formations and for...
6058073 Elastic impedance estimation for inversion of far offset seismic sections  
A computer-implemented method, and system implementing the method, of performing impedance inversion of seismic survey data are disclosed. Sonic and density well logs are used to generate an...
6058074 Method and system for detecting hydrocarbon reservoirs using amplitude-versus-offset analysis with improved measurement of background statistics  
A computer system and method of operating the same to apply overburden corrections to seismic signals prior to amplitude-versus-offset (AVO) analysis is disclosed. The system and method retrieve...
6041017 Method for producing images of reservoir boundaries  
A method of producing images of the limits of a geologic reservoir from measurements of fluid pressure in a well controlled to produce from the reservoir at a constant flow rate. The measurements...
6028820 Method for determining the presence of fluids in a subterranean formation  
A method for seismic data interpretation for the purposes of identification of oil, gas and water accumulation locations and delineation of their contours uses a model of discrete media with...
6016287 Apparatus and method for accurately determining the location of events such as peaks in seismic data  
An operator sitting at a workstation views, on a display, a multitude of seismic traces having one or more horizons indicated therein by a plurality of sets of events (such as peaks or troughs or...
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...
6014342 Method of evaluating a subsurface region using gather sensitive data discrimination  
A method of evaluating a subsurface region by separating/enhancing a certain type of seismic event data of interest from an overall set of seismic event data which includes other, different types...
6002640 Seismic data acquisition system  
A seismic data acquisition system is featured that utilizes a series of nearly identical seismic shots (SISS) to synchronize and to communicate with novel data acquisition units (NDAU) located in...
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...
5999484 Methods of analyzing stoneley waveforms and characterizing underground formations  
A method of analyzing Stoneley waveforms obtained in a well logging operation, includes analyzing the waveforms by means of multiparameter inversion using one or more externally provided...
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...
5982707 Method and apparatus for determining geologic relationships for intersecting faults  
A novel fault framework method and apparatus automatically computes the relationships between intersecting fault surfaces. When faults are loaded into the novel fault framework apparatus, all...
5978314 Method for determining seismic velocities  
A method for determining a substantially optimal NMO velocity function for use in stacking a CMP gather of seismic data traces. The method begins with an initial estimate of the NMO velocity...
5978313 Time synchronization for seismic exploration system  
A system and method for synchronizing collection of seismic data used for seismic surveys. In one embodiment, positioning signals received from a positioning system, such as the Global Positioning...
5963508 System and method for determining earth fracture propagation  
Hydraulic fracture extension in earth formation zones of interest may be monitored by placing one or more monitor wells in predetermined positions on opposite sides of an azimuth aligned with the...
5963507 Method for improving the accuracy of ocean bottom reflectivity estimations using the inverse backus filter  
A method for determining ocean bottom reflectivities from dual sensor seismic data, whereby a first time windowed pressure signal and a first windowed velocity signal are summed to generate a...
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...
5862100 Method and system for detecting hydrocarbon reservoirs using statistical normalization of amplitude-versus-offset indicators based upon seismic signals  
A method and system for producing an indicator for amplitude-versus-offset (AVO) analysis of seismic survey data is disclosed. According to the disclosed method and system, a raw AVO indicator is...
5859811 Method of analyzing waveforms  
A method of analyzing a spatial series of waveforms, each waveform of which contains components arising from at least two substantially uncorrelated features, includes the steps of sorting the...
5852588 Method of processing seismic data  
A method for determining the anisotropic properties of an unknown earth formation by means of seismic exploration includes generating seismic signals for propagation through the unknown formation....
5828570 Unconstrained 2-D transformation filter  
An unconstrained transformation filter operator that is efficient in terms of computer resources and that improves circularly symmetric migrated impulse response for steep dips. The filter...
5818795 Method of reduction of noise from seismic data traces  
A method of suppression of burst coherent noise in seismic data is provided comprising (a) comparing a threshold amplitude characteristic acceptance value for a time window of a reference trace to...
5784334 Method and system for detecting hydrocarbon reservoirs using amplitude versus offset analysis of seismic signals  
A computer-operated method for analyzing seismic data to discern the presence of hydrocarbon-bearing formations is disclosed. According to the disclosed method and system, amplitude-versus-offset...
5774419 High speed point derivative microseismic detector  
A high speed microseismic event detector constructed in accordance with the present invention uses a point derivative comb to quickly and accurately detect microseismic events. Compressional and...
5764514 Method for modelling kinematic seismic data processed with at least one motion operator  
A method of modelling at least travel time and apparent dip from seismic data that has been processed by at least one migration operator comprising the steps of taking the mid-point (N1) of a...
5757723 Method of processing data representing energy passing through a medium  
A method is provided for processing data representing energy passing through a medium and subjected to multiple internal reflections. The method may be applied to reflection data, in which case...
5754493 Analysis of velocity data  
The invention is concerned with the analysis of velocity data such as sonic data obtained from wells. The invention includes analyzing time versus depth data and generating velocity versus depth...
5737219 Method of monitoring deformation of geological structures and predicting geodynamic events  
A method of monitoring short-term and long-term deformation changes in a geological space and predicting geodynamic events in a region, such as earthquakes, landslides, dilatations and subsidence...
5726951 Standoff compensation for acoustic logging while drilling systems  
A standoff compensation system is disclosed for use in an acoustic LWD system. An acoustic transducer is provided to measure the standoff distance between the logging tool and the borehole wall....
5721710 High fidelity vibratory source seismic method with source separation  
A method of separating the effects of the earth response on vibratory energy from individual ones of multiple vibrators to geophones, in generating a seismic survey, is disclosed. According to the...
5719580 Method and apparatus for digital compensation of VCO nonlinearity in a radar system  
An apparatus for correcting for nonlinearities in modulation systems includes a transmitter (24, 28, 48, 50, 52) for transmitting a time varying modulated radar signal (56). A receiver (58, 62)...
5719821 Method and apparatus for source separation of seismic vibratory signals  
A method of separating the effects of the earth response on vibratory energy from individual ones of multiple vibrators to geophones, in generating a seismic survey, is disclosed. According to the...
5677892 Unaliased spatial trace interpolation in the f-k domain  
A computer-aided method for providing a de-aliased output data set dL (t,xL,yL) from a spatially aliased, three-dimensional, input data set of known seismic signals, a(t,x,y), where L is an...
5675551 Apparatus and method for evaluation of score failures in picking of 3-D seismic data  
Apparatus and method are disclosed for use with a horizon picking method for 3D seismic data. Variables such as picking method, whether simple or iterative, score required of an iterative method...
5673191 Method and apparatus for identifying geological structures using wavelet analysis of potential fields  
A method of analyzing geological survey data of the potential field measurement type is disclosed. According to the disclosed method, discrete measurement values of the potential field, either the...
5657294 Short window norm optimization for multi-source multi-component seismic data  
A method for processing multi-source multi-component shear wave seismic data. The method comprises the steps of: acquiring four component shear wave seismic data; converting the data into a matrix...
5648937 Method and apparatus for correlating geological structure horizons from velocity data to well observations  
A method and apparatus for adjusting the results of a seismic survey according to well log data obtained from wells within the survey region is disclosed. The disclosed method operates on one...
5642328 Method for determining validity of seismic reflections below lateral velocity variations  
A method for determining the reliability of time processed seismic reflection data near a significant velocity differential overhang includes displaying the seismic reflection data as a seismic...
5642327 Method for creating a gain function for seismic data and method for processing seismic data  
Disclosed is a method for creating a gain function for seismic data and to processing methods for utilizing such a gain function. The method of creating the gain function generally includes...
5639997 Acoustic noise cancelling apparatus for well logging and method of well logging  
Disclosed is a sonic well tool for performing acoustic investigations of subsurface geological formations penetrated by a borehole, and a method of logging formation data. The well tool generally...
5586082 Method for identifying subsurface fluid migration and drainage pathways in and among oil and gas reservoirs using 3-D and 4-D seismic imaging  
The invention utilizes 3-D and 4-D seismic surveys as a means of deriving information useful in petroleum exploration and reservoir management. The methods use both single seismic surveys (3-D)...
5579248 Method for removing borehole rugosity noise from well log data  
A method for eliminating sinusoidal noise without affecting the response of the formation means that the actual formation responses of the logging tools are recovered, and the logs can be used...

Matches 251 - 300 out of 430 < 1 2 3 4 5 6 7 8 9 >