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Document Title 

5029145 
Methods of geophysical exploration
A novel method of geophysical exploration is provided whereby shot points and receiver locations are positioned such that seismic data resulting therefrom can advantageously be processed employing... 

5018112 
Method for hydrocarbon reservoir identification
A method for processing threedimensional seismic data to define areal boundaries of hydrocarbon reservoirs. 3D Seismic data for an area having a producing well is examined to establish an... 

5014249 
Method in a real time control system for seismic interference
A method in real time control systems for seismic interference to indicate an acceptable level of interference in relation to the amplitude, angle of incidence, and frequency of a seismic... 

5010976 
Characterization of the full elastic effect of the near surface on seismic waves
A method of seismic exploration uses recordings from both surface receivers and buried sensors to determine the full elastic effect of the near surface layer on an applied seismic wave. The... 

5012453 
Inverse vertical seismic profiling while drilling
A method for producing an inverse vertical seismic profile using a seismic source place down a borehole has been invented. The directly transmitted waves from the seismic source and the secondary... 

5008861 
Geophysical exploration by automatically picking and associating stacked seismic sections with regional coherency peaks of velocity spectra
Regional velocity spectra coherency peaks are associated with peak events on a stacked seismic section of CMP gathers and used for editing siesmic data. In addition, travel time and spatial... 

4972383 
Method of obtaining a model representative of a heterogeneous medium, and particularly the subsoil
A method for providing an optimum model having at least two dimensions of a heterogeneous medium, representing the variations of at least one physical parameter, for example the acoustic impedance... 

4972382 
Time variant suppression of coherent noise signals in a seismic section
Timeinvariant multichannel seismic data filters are applied to seismic data traces for rejecting coherent noise signals within a timespace window. In one embodiment, these filters are applied... 

4964086 
Method for characterizing velocity estimates
The present invention provides a novel method for obtaining quality indices for objectively characterizing seismic velocity estimates in geophysical data bases. 

4964098 
Method for seismic trace interpolation
A method for seismic trace interpolation by dip range analysis is disclosed. In the preferred embodiment, a series of dip ranges are defined by a plurality of dips. A trace estimate for each of... 

4953139 
Method for restoring and extrapolating seismic traces
A seismic record is enhanced through trace restoration and extrapolation. A set of traces surrounding a missing trace or adjacent an edge of the seismic record are transformed into the frequency... 

4935905 
Method and apparatus for seismic exploration
A geophone is disclosed which includes at least two transducers having axes which are perpendicular to each other for generating Cartesian coordinate signal components in response to at least... 

4935904 
Method for suppressing coherent noise in seismic data
A method for removing boundarygenerated artifacts in synthetic and actual seismic data. After seismic data processing, undesirable boundarygenerated artifacts appear in the final seismic... 

4935748 
Blast recorder and method of displaying blast energy
A blast recorder and method for monitoring and processing vibrations from blasts, and for displaying the results in a nearly real time basis and in a manner which is easily interpreted by a... 

4926394 
Monte Carlo method for estimating lithology from seismic data
A Monte Carlo statistical method for combining discrete geological measurements of rock properties with continuous measurements of seismic attributes and for converting those combined measurements... 

4924390 
Method for determination of earth stratum elastic parameters using seismic energy
A method of processing seismic data involves the input of common depth point data for determination of obliquity of downward propagating energy. Data having known surface offset and travel time is... 

4922362 
Methods for deconvolution of unknown source signatures from unknown waveform data
A method for the determination and deconvolution of the signature of an unknown, nonimpulsive source signal. The method supposes that that an array of receivers is positioned at the earth's... 

4922465 
Interpolation of severely aliased events
Methods for interpolation of severely aliased events in which composite wavelets of a section of seismic data traces are separated by wave field decomposition into their component wavelets. The... 

4918670 
Method for interval velocity analysis and determination of reflector position from before stack seismic data
A method for interval velocity analysis and reflector position determination from before stack seismic data includes developing a constant traveltime curve for a source and receiver pair. The... 

4905204 
Method of weighting a trace stack from a plurality of input traces
A method is disclosed for developing a weight function for a trace stack from the weight functions derived from the respective weight functions of an ensemble of individual separate input traces.... 

4893694 
VSPbased method and apparatus for tieing seismic data shot using different types of seismic sources
VSPbased method for tieing surface data shot with different types of seismic sources together. VSP data is acquired using the same types of seismic sources utilized to acquire the surface data.... 

4866679 
Method for identifying anomalous noise amplitudes in seismic data
A method for identifying anomalous noise amplitudes in seismic records by deriving a measured amplitude factor over predetermined periods of time or time windows for a predetermined number of... 

4862423 
System for reducing drill string multiples in field signals
The invention comprises a method of geophysical exploration wherein a signal is generated at the lower end of a drill string and propagates into the earth and up said drill string. The signal is... 

4858199 
Method and apparatus for cancelling nonstationary sinusoidal noise from seismic data
Method and apparatus for cancelling nonstationary sinusoidal noise from seismic data. An estimate of the sinusoidal noise component is applied to a contaminated signal containing both a sinusoidal... 

4853902 
Predictive noise filtering of multicomponent seismic data
An improvement in a method of treating seismic data in which predictive noise, as measured along one of the axes is discriminated and subtracted from the total signal along another of the axes... 

4841490 
Inversion of a vertical seismic profile by minimization of an entropy like function
The present invention is directed to a method of inverting seismic traces Sk by determining the series R={ri } representative of the seismic reflection coefficients from geological strata. The... 

4841444 
Method for continuous estimation by nonlinear signal matching of seismic traces
A method for continuous velocity estimation of seismic data uses nonlinear signal matching. Common depth point trace data is examined at selected offsets and nonlinear signal matching is... 

4839869 
Methods for processing converted wave seismic data
The present invention provides methods for processing converted wave seismic data which includes, fractional point gathering of the data in a manner consistent with a selected velocity model,... 

4837752 
Method for establishing a common bandwidth for processing seismic data obtained from different sources, recording equipment and surveys
A common bandwidth determination method for two disparate seismic datasets includes developing a weighted average of first leastsquares filters assuming the data from the first dataset is the... 

4829487 
Method for restoring seismic data using crosscorrelation
Method of restoring null traces in seismic records. A trace for which restoration of the data is desired, as well as adjoining traces on each side of the null trace are selected. A series of... 

H000482 
Seismic migration method
A seismic data processing method in which seismic traces (each trace containing a signal resulting from reflection of a seismic signal at a location within the earth, and each trace being... 

4729101 
Method for identifying and separating the effects of elastic and anelastic formation properties in seismic data
The present invention relates to a method for identifying and separating the effects of elastic and anelastic formation properties in a seismic signal representative of the earth's response to... 

4727488 
Method and apparatus for detecting seismic events by identifying crossings in the Nth derivative of a waveform
An electronic system automatically detects significant events in a seismic trace. The seismic trace is defined as a series of consecutive points, equally spaced in time. The system provides for... 

4725991 
Method for controlling blasting operations
A method for predicting the ground vibration and airborne noise at any position resulting from a blasting operation using the data obtained from one or more singlecharge low level blasts. By... 

4715020 
Simultaneous performance of multiple seismic vibratory surveys
The invention is a method of performing a plurality of vibratory seismic surveys simultaneously. A plurality of vibratory sources transmit signals into the earth. Each vibratory source... 

4713775 
Intelligent assistant for using and operating computer system capabilities to solve problems
To help a user program a computer target system to solve problems, the computer system is provided with predefined capabilities and the user is provided with a knowledge system that includes... 

4706223 
Method for determining the position of a subterranean reflector from a traveltime curve
A method for determining the position of a subterranean plane reflector relative to a known location on the earth surface from unprocessed seismic data received at a number of colinear acoustic... 

4703426 
Method and apparatus for reviewing and modifying horizons of a threedimensional seismic volume
A computer system reviews and modifies horizons tentatively defined by a network of pairs of turnings. The curvature for each of the paths of turnings of the network in both the X and Y directions... 

4679174 
Method for seismic lithologic modeling
A method of seismic exploration of the subsurface of the earth. Seismic reflection data are gathered in a selected area. The seismic data are combined with available nonseismic data to define an... 

4672546 
Systems for extracting horizons contained in a 3D network of turnings and converting the horizons to a 2D format
A computer system extracts horizons, each defined by a network of points in a first format from within a threedimensional volume. Each point is tagged with a plurality of parameters including... 

4665510 
Method for attenuating multiples in CDP data gathers
A method for attenuating multiples in common depth point data whereby common depth point data is received and spike deconvolution maybe performed on the data. The data is constant velocity stacked... 

4646239 
Method of seismic exploration including processing and displaying seismic data to quantitatively distinguish among seismic events
A method for quantitatively distinguishing seismic events on a seismic record for inferring changes in the geological character of the subterranean formations. Reflection coefficients are obtained... 

4636993 
Automatic gain control for seismic data
An improved apparatus and method for calculating automatic gain correction to be applied to seismic samples is disclosed which features apparatus and method for calculation of the average absolute... 

4633401 
Method and apparatus for automatically determining pairs of turnings related to the same seismic event in adjacent seismic traces
A computer system automatically determines pairs of significant turnings related to the same seismic event in adjacent seismic traces of a threedimensional seismic volume, wherein a turning is... 

4633402 
Method and apparatus for automatically producing representations of threedimensional horizons from processed seismic data
An electronic system automatically produces representations of threedimensional recommended horizons from processed seismic data. Significant events, in the form of turnings, are identified in... 

4611312 
Method of seismic collection utilizing multicomponent receivers
By using wave tracking rather than a downward continuation concept, two sets of elastic wave fields (one generated by a seismic source, the other recorded by multicomponent geophones) are migrated... 

4611311 
Method of seismic processing involving converted P or Swave data
This invention relates to a method of increasing resolution of highintensity amplitude events in seismic records provided by common midpoint collection methods (CMP) wherein nonsymmetrical travel... 

4608673 
Minimum phase bandpass filtering of seismic signals
A process for better defining first break seismic energy travel times for correlated seismic return signals that consists of constructing a minimum phase bandpass filter having bandwidth narrower... 

4597066 
Method of seismic processing and displaying simultaneously collected conventional and converted P or Swave data
This invention relates to a method of increasing resolution of highintensity amplitude events in seismic records provided by common midpoint collection methods (CMP) wherein nonsymmetrical travel... 

4596005 
Method of seismic collection utilizing multicomponent processing receivers and processing resultant conventional and converted P or Swave data
This invention relates to a method of increasing resolution of highintensity amplitude events in seismic records provided by common midpoint collection methods (CMP) wherein nonsymmetrical travel... 