Match

Document 
Document Title 

8537637 
Method of seismic surveying and a seismic surveying arrangement
A method of seismic surveying A method of seismic surveying comprises the step of acquiring imaging seismic data relating to an underlying geological structure at a survey location and... 

8509027 
Continuous adaptive surface wave analysis for threedimensional seismic data
A technique includes receiving seismic data acquired in a survey of a region, the region being associated with locations; processing the seismic data to estimate at least one frequency dependent... 

8441890 
Removing groundroll from geophysical data using sourcereceiver interferometry
A method for processing geophysical data. The method includes applying a first interferometry on an estimate of a direct ground roll between a receiver location and one or more boundary source... 

7466626 
Seismic surveying arrangement
A seismic surveying arrangement comprises a vertical source array (26) having at least two sources (27,28) of seismic energy. The source array (26) is disposed such that a first source (28) is... 

7414919 
Method for improving the seismic resolution
A method for improving the seismic resolution in the field of petroleum exploration and development, using the steps of: (1) ensuring the depth and the velocity of the lowvelocity layer and the... 

7408836 
Method of and apparatus for processing seismic data in the presence of anisotropy
A method of and apparatus for processing seismic data. A method of processing seismic data comprising the steps acquiring seismic data in at least two shots that have different sourcereceiver... 

7154812 
Method for retrieving local nearsurface material information
The invention concerns a method for retrieving local nearsurface material information including the steps of:—providing a group of receivers comprising at least one buried receiver and at least... 

6982928 
Seismic Pwave velocity derived from vibrator control system
Pwave velocity in a nearsurface region of a land area is estimated from a combination of seismic data based upon waves in the nearsurface region generated in response to a shock in each of a... 

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... 

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... 

6081482 
Semirecursive imaging under complex velocity structures
A computationally efficient semirecursive Kirchhoff migration algorithm is capable of obtaining accurate images of complex structures in complex geological environments which commonly give rise... 

5764516 
Method and system for surfaceconsistent phase and time lag correction of seismic data
A computer system and method for correcting seismic data for phase distortion due to the effects of the nearsurface layer are disclosed. Phase error corrections are performed on multiple... 

5629905 
Method of datuming seismic data and method of processing seismic data
Disclosed is a method of datuming seismic trace data from a first horizon to a lower second subsurface horizon, both located above a target horizon. A seismic source and receiver are positioned... 

5587968 
Method for measuring the nearsurface shear wave velocity for use in determining 3component 3D statics
In the presence of an anisotropic nearsurface earth layer, orthogonally oriented microspreads are provided from which shearwave velocity vectors Vsiθ and Vsθ may be determined. The respective... 

5532976 
Curvedray replacement dynamics
A method of geophysical prospecting wherein nonhyperbolic distortion is reduced from marine seismic data, or land seismic data over a low seismic velocity layer, is disclosed. The method comprises... 

H001529 
Method for wave equation velocity replacement of the lowvelocitylayer in seismic data processing
A method for correcting seismic data for the effects of the lowvelocitylayer. According to the method, estimates of the seismic velocity in the lowvelocitylayer and the depth of the... 

5502687 
Method for datumizing seismic data by forward modeling
Disclosed is a method for processing geophysical data that have been gathered over irregular topography. According to the method, a datum is established that lies above the highest topographic... 

5500832 
Method of processing seismic data for migration
Disclosed is a technique for processing seismic data to enable the data to be migrated without stacking. Seismic data provided in common midpoint gathers are converted to a domain defined in terms... 

5157638 
Method of deriving statics corrections from common reflection point gathers
A method for static correction includes a three step process which eliminates the problems of assuming hyperbolic moveout curves and forming base traces from common midpoint gathers while... 

5073876 
Geophysical exploration using near surface structure corrections developed from common endpoint gather stacked traces
Weathering corrections are determined from first arrival times of refraction stacked traces of common end point gathers. The refraction stacked traces are generated by selecting traces having... 

5051960 
Method of removing records of multiple reflection events from seismic data
A method of removing multiple reflection events from seismic records is described. A shallow primary reflection event is used as a model for a deeper primary, and is distorted responsive to the... 

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... 

4943950 
Method for migrating seismic data
A method for properly migrating seismic data which has been elevationstatic corrected. The method is comprised of assigning a zero (or very small) migration velocity for data located below a... 

4750157 
Seismic vibrator earth impedance determination and compensation system
An earth impedance determination and compensation system for use with a seismic vibrator utilizes output signals from accelerometers on the baseplate and reaction mass portions of the vibrator to... 

4695984 
Method for establishing a surface consistent correction for the effects of the low velocity layer in seismic data processing
A method useful in seismic data processing for correcting data for the effects of the low velocity layer. At least three sets of traces having common offsets are displayed as a function of... 

4581724 
Method for determining source and receiver statics in marine seismic exploration
A method of determining source and receiver statics in a marine exploration area overlying a near surface low velocity layer employing a marine vessel for towing a seismic energy source and a... 

4415997 
Method for determining source and receiver statics in marine seismic exploration
A method of determining source and receiver statics in a marine seismic exploration area overlying a near surface low velocity layer employing a seismic marine energy source, an onbottom seismic... 

4218766 
Method of seismic wave amplitude normalization
Disclosed is a method of processing geological seismic reflection data to compensate for lateral variations in the attenuation effect which the weathered layer has on the reflected seismic energy... 

4069471 
Method of determining weathering corrections in seismic record processing
The method of determining the magnitude of the differential static correction between two selected adjacent receiver points D, E, in a linear seismic array, that involves the steps of: recording a... 

3794827 
INVEL SYSTEM OF VELOCITY DETERMINATION
This is a new way of compositing multifold commondepthpoint data from seismic prospecting operations to improve the making of static corrections, particularly when determining velocity. Such... 

3731269 
STATIC CORRECTIONS FOR SEISMIC TRACES BY CROSSCORRELATION METHOD
A method is disclosed for determining sourcetodatum corrections for a multitrace seismic crosssection. The method comprises the measurement of a multiplicity of crosscorrelation functions... 

3697939 
CORRECTIONS FOR SEISMIC DATA OBTAINED FROM EXPANDINGSPREAD
Seismic signals from detectors forming split spreads are utilized to correct for weathering, elevation, and the like signals from detectors forming an expanded spread. The signals of the seismic... 

3569922 
METHOD FOR ELIMINATING SELECTED NOISE DISTURBANCES FROM SEISMIC RECORDINGS
A method for attenuating undesirable seismic noise disturbances by providing an effective adjustable attenuation bandwidth between the attenuation afforded by the geophone spread and stacking. The... 

3500543 
METHOD FOR EDITING SEISMIC TRACES


3323104 
Hybrid computer to make dynamic and static seismic record corrections


3284765 
Apparatus for establishing a common datum plane


3247481 
Method and apparatus for displaying seismic signals


3185249 
Computing seismic information


3143946 
Method for forming seismic and other records


3143055 
Seismic section correction device


3065814 
Seismic weathering correction


3046553 
Seismic reproducing and recording device


3045241 
Oscillographic camera


3012223 
Seismic prospecting apparatus


3011145 
Photographic printing system for channelized multiple trace records


2990535 
Seismic equipment


2946393 
Method of seismic prospecting


2937915 
Recording system


2884194 
Analog computer to determine seismic weathering time corrections


2851122 
Seismic exploration methods, systems, and apparatus
