Matches 1 - 50 out of 100 1 2 >


Match Document Document Title
7679993 Method of characterizing a fractured reservoir using seismic reflection amplitudes  
A method of characterizing a fractured reservoir in a field includes measuring seismic reflection coefficient of the fractured reservoir as a function of angle of incidence and azimuth, predicting...
7515505 Method for continuous sweeping and separation of multiple seismic vibrators  
A method for simultaneously operating multiple seismic vibrators using continuous sweeps (little or no “listening” time between sweeps) for each vibrator, and recovering the separated seismic...
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...
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...
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...
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...
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...
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...
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 (Δt) measurements obtained from a borehole tool in the...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
4809239 Method for evaluating parameters related to the elastic properties of subsurface earth formations  
Three-axis vertical seismic profile measurements are analyzed to derive values for the velocity vp and angel of incidence Ψp of a plane compressional wave at the borehole and for the shear wave...
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...
4688198 Entropy guided deconvolution of seismic signals  
Disclosed are a process and a system for improving seismic returns and other signals representative of non-time varying series which have been degraded by interaction with unknown wavelets. Use is...
4661935 Seismic data processing  
A variable amplitude/phase color seismic display is provided which increases the ease with which interpreters can locate peaks, troughs and other information of interest.
4654836 Seismic vibrator source having improved phase detector  
A vibrator seismic source has a hydraulic system, including a pad, for applying reciprocating forces to the ground and sensor means for generating a feedback signal representative of the force...
4633399 Method of seismic data enhancement using a phase of rectified trace seismic parameter  
A method for developing a novel seismic data attribute enables improvements in seismic data processing and interpretation. Seismic signals or trace data are first rectified and then Hilbert...
4633447 Response waveform characterization of geophysical data  
A method of processing geophysical seismic data so as to enhance its evaluation and interpretation. A plurality of response waveform characteristics are developed from a seismic signal. The...
4554647 Method for measuring seismic phase shift of compressional waveforms  
Seismic pulse waveforms are generated for travel through subsurface formations. Both normally-reflected and obliquely-reflected waveforms from subsurface interfaces are recorded. The differential...
4542487 Method and apparatus for shear wave logging  
Apparatus for shear wave logging of formations adjacent a borehole wherein a tubular apparatus is specifically constructed for sympathetic movement with the borehole in response to low frequency...
4532618 System for and method of processing a seismic signal  
A seismic signal is created, processed and recorded and then analyzed to determine the nature of subterranean formations. A method of creating, processing and recording a seismic signal comprises...
4500976 Seismic exploration  
In a seismic exploration system, the waveforms provided from a plurality of seismic sources are phase shifted so as to maximize the strength of signals received by a plurality of seismic receivers...
4479204 Method of monitoring the spacial production of hydrocarbons from a petroleum reservoir  
In the injection of fluids into subsurface geological formations, such as for the purpose of recovering a mineral in that formation, it is important that the flow progress of that fluid is known...
4458341 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 sensing vertical and horizontal in-line components of seismic waves. In one...
4367542 Phase shifting of waveforms  
A signal having the form cos (Ωt+φ) where Ω is the frequency of the signal and φ is a phase angle which may be zero is phase shifted to improve the results of the summation of such a signal with...
4353121 High resolution, marine seismic stratigraphic system  
High resolution, high penetration marine seismic stratigraphic system wherein a slanted cable comprising spaced-apart hydrophone arrays gather seismic reflections so that the corresponding primary...
4351035 Method of and apparatus for locating disturbances in a mineral seam  
Faults in an underground coal seam are located by firing a shot at one point in the seam and detecting the seismic reflections in an array of geophones. Signals from the geophones are recompressed...
4348749 Phase correcting seismic traces  
This specification discloses a system and method for processing deconvolved seismic traces to compensate for phase distortion introduced in deconvolving the traces. The method provides for...
4314364 Long sweep vibroseis record production  
This invention relates to continuous wave seismic exploration and more particularly to generating long sweep continuous seismic waves and utilizing signals resulting from detection of said seismic...
4104611 Suppressing constant frequency noise in seismic records  
A method and apparatus for removing a sinusoidal noise signal having constant amplitude and phase from a seismic signal. The noise signal is continuously monitored to detect its phase and zero...
4042910 Method of seismic exploration  
A method of suppressing noise trains that develop from harmonics of a vibrator-type sweep signal. It includes the step of generating a plurality of such sweep signals in series and with the phase...
3979715 Method and system for achieving vibrator phase lock  
An improved controller for vibratory seismic energy sources insures that the energy imparted to the ground by the source is in phase with the reference signal. Phase lock is achieved in a manner...
3961307 Exploration of the boundaries of an underground coal seam  
Pulses of monochromatic coherent sound waves are emitted at an underground test station into a coal seam from several closely juxtaposed sources to form a beam whose reflection at a discontinuity...
3889229 System for eliminating monochromatic signals from data records  
Apparatus is described for eliminating monochromatic interfering frequency components of seismic signals detected during the course of seismic exploration comprising an electrical circuit for...

Matches 1 - 50 out of 100 1 2 >