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Document Title 

8995224 
Realtime velocity and porepressure prediction ahead of drill bit
Techniques for estimating velocity ahead of a drill bit include generating seismic waves at a surface from at least two different source positions in the vicinity of a borehole, receiving seismic... 

8976625 
Optimization approach to Qfactor estimation from VSP data
A zerooffset VSP survey is carried out with spaced apart receivers located in a vertical wellbore. Spectra of the signals at the receivers following wavefield separation are estimated. An... 

8942064 
Sending a seismic trace to surface after a vertical seismic profiling while drilling measurement
A system, method and computerreadable medium for acquiring seismic data, which includes activating a seismic source at a surface location; defining a seismic trace of a seismic wave received at a... 

8913462 
Realtime reflection point density mapping during threedimensional (3D) vertical seismic profile (VSP) surveys
Methods and apparatuses are disclosed for generating three dimensional (3D) vertical seismic profiles (VSPs) in a more time efficient manner. The methods and apparatuses enable faster and more... 

8902707 
Analysis of uncertainty of hypocenter location using the combination of a VSP and a subsurface array
Acoustic signals resulting from microseismic events in the subsurface are received in a first array of detectors deployed in a borehole and in a second array of detectors at or near the surface of... 

8902700 
Borehole seismic acquisition system
A borehole seismic acquisition system is described with a plurality of sensors arranged so as to identify within the data measured by the pressure sensors P and Swave related signals converted... 

8854919 
Generating inversion ready seismic data
A technique includes receiving first seismic data acquired by one or more receivers in response to energy produced by one or more seismic sources interacting with a subsurface feature. The first... 

8750074 
Anisotropic parameter determination
A walkaway VSP survey is carried out using a receiver array. First arrivals to a plurality of receivers are picked and used to estimate a normalmoveout (NMO) velocity. Using the NMO velocity and... 

8720264 
Performance of permanently installed tubing conveyed seismic arrays using passive acoustic absorbers
Methods and apparatus for reducing the impact of guided (or “tube”) waves in permanently installed seismic systems. By utilizing passive acoustic absorbers, the impact of tube waves may be... 

8688382 
Detection of downhole vibrations using surface data from drilling rigs
Disclosed is a method for estimating downhole lateral vibrations a drill tubular disposed in a borehole penetrating the earth or a component coupled to the drill tubular. The method includes... 

8659974 
System and method of 3D salt flank VSP imaging with transmitted waves
According to a preferred aspect of the instant invention, there is provided herein a system and method for imaging complex subsurface geologic structures such as salt dome flanks using VSP data.... 

8605544 
Hybrid seismic sensor network
A system for monitoring seismicity during fluid injection at or near a hydrocarbon reservoir comprising: a first set of seismic sensors for deployment at a site for collecting seismic data; a... 

8576663 
Multicomponent seismic inversion of VSP data
A method for seismic inversion of vertical seismic profile (VSP) data in an oilfield. The method includes obtaining an initial velocity model of a subterranean formation including acoustic... 

8531914 
Method of imaging a target area of the subsoil from walkaway type data
A method of imaging a target area of the subsoil from “walkaway” data having application to development of oil reservoirs or monitoring of geologic storage sites is disclosed. After acquisition of... 

8457899 
Method of processing data obtained from seismic prospecting
A method of calculating a seismic noise image for a formation comprises the steps of: a) obtaining data representing a multicomponent seismic signal from at least one receiver, in response to... 

8428880 
Method of processing data obtained from seismic prospecting
A method of processing data obtained from seismic prospecting of an earth formation, comprises obtaining data representing a multicomponent seismic signal from a multicomponent seismic receiver at... 

8395967 
Vector migration of virtual source VSP data
A walkaway VSP survey is carried out with receivers located in a borehole under a salt overhang. Redatuming of the multicomponent data to virtual sources in the borehole followed by vector... 

8345509 
System and method to create threedimensional images of nonlinear acoustic properties in a region remote from a borehole
In some aspects of the disclosure, a method for creating threedimensional images of nonlinear properties and the compressional to shear velocity ratio in a region remote from a borehole using a... 

8238195 
Method for 3C 3D wavefield decomposition
An apparatus and a method for processing of three components, 3Dimensions seismic (3C, 3D) data acquired by downhole receivers and surface seismic sources. Automatic velocity analysis is used... 

8208341 
Processing of combined surface and borehole seismic data
Methods and related systems are described for processing surface seismic data. Surface seismic data representing seismic signals detected at a plurality of surface locations is wavefield... 

8154951 
Modelbased relative bearing estimation of threecomponent receivers
A method is disclosed for more accurately determining the relative bearing angle of a directional receiver in a borehole using an existing threedimensional (3D) geological model, one or more... 

8077546 
Method for monitoring a multilayered system
A method for monitoring a multilayered system below a surface comprising a slow layer and a fast layer; the method comprising: transmitting one or more seismic waves from one or more seismic... 

8009510 
Two way check shot and reverse VSP while drilling
Methods and related systems are described making seismic measurements. Seismic energy is transmitted into the earth using a surface seismic source. The seismic energy is received with one or more... 

7952960 
Seismic imaging with natural Green's functions derived from VSP data
The methods described herein are conceptually similar to classical migration/imaging for surface seismic data. However, instead of using computed (estimated) Green's functions in the imaging... 

7940192 
Channel equalization for mudpulse telemetry
Channel estimation and signal equalization is used in a mudpulse telemetry system for uplink communication during drilling of wellbores. 

7911878 
Subsalt reflection tomography and imaging by walkaway VSP survey
A walkaway VSP survey is carried out with receivers located in a borehole near the base salt. Reflection tomographic inversion of data from the walkaway VSP is used to derive a velocity model for... 

7764571 
Vector 3component 3dimensional Kirchhoff prestack migration
An apparatus and a method for migration of three components, 3Dimensions seismic (3C, 3D) data acquired by downhole receivers and surface seismic sources. This method utilizes full 3... 

7751279 
Subsalt reflection tomography and imaging by walkaway VSP survey
A walkaway VSP survey is carried out with receivers located in a borehole near the base salt. Reflection tomographic inversion of data from the walkaway VSP is used to derive a velocity model for... 

7746726 
Method for processing borehole seismic data
Seismic data recorded by subsurface seismic sensors placed in a borehole, such as an oil or gas well, are transformed via a process of upward wavefield propagation to pseudoreceivers at the... 

7710822 
Vertical seismic profiling method utilizing seismic communication and synchronization
A whiledrilling Vertical Seismic Profiling (VSP) data acquisition system utilizing the same seismic shots for three purposes is disclosed. First, the seismic shots provide a means for... 

7693006 
Vector migration of 1st order freesurface related downgoing multiples from VSP data
1st order freesurface multiples recorded in VSP data or reverse VSP data are processed using a 3C 3D vector migration method to produce an image of the subsurface. This image produces a larger... 

7688674 
Methods and apparatus for performing moving checkshots
Methods and apparatus for creating a velocity profile of a formation surrounding a borehole by checkshot measurements while moving the tool along the borehole. A conveyance and a sensor section... 

7675816 
Enhanced noise cancellation in VSP type measurements
A method and system for acquiring seismic data while conducting drill string operations in a wellbore. The seismic receiver combination set comprises a combination of orthogonal geophones and... 

7663971 
Resonance scattering seismic method
Resonance scattering analysis of at least 3component (3C) VSP data detects heterogeneities in the proximity of a borehole. A method for seismic exploration of a predetermined volume of the... 

7660194 
Microseismic fracture mapping using seismic source timing measurements for velocity calibration
A system and method for microseismic fracture mapping using seismic source timing measurements for velocity calibration is disclosed. The system may include a seismic source coupled to a wireline... 

7633834 
VSP pattern recognition in absolute time
A procedure to determine VSPWD (Vertical Seismic Profiling—While Drilling) first breaks in absolute time is described. By combining a seismic surface source and firing complex seismic pattern... 

7602669 
Tubewave seismic imaging
The detailed analysis of cross well seismic data for a gas reservoir in Texas revealed two newly detected seismic wave effects, recorded approximately 2000 feet above the reservoir. A tubewave... 

7542373 
Vector 3component 3dimensional kirchhoff prestack migration
An apparatus and a method for migration of three components, 3Dimensions seismic (3C, 3D) data acquired by downhole receivers and surface seismic sources. This method utilizes full 3... 

7535800 
Seismic imaging and tomography using seabed energy sources
Insea seismic energy sources, deployed at or near the seabed, generate seismic waves in earth formations beneath the seabed when activated by a triggering mechanism at a precise time synchronized... 

7512034 
Drill noise seismic data acquisition and processing methods
A method of acquiring seismic data that includes deploying a first array of seismic receivers and a second array of seismic receivers, and simultaneously receiving drill noise seismic energy... 

7508735 
Method of analyzing vertical seismic profile data, method of producing a hydrocarbon fluid, and a computer readable medium
A Pwave slownesspolarization data set resolving Pwave slowness against Pwave polarization angle is extracted from a multioffset vertical seismic profiling data set. A function relating Pwave... 

7496488 
Multiscale finitevolume method for use in subsurface flow simulation
A multiscale finitevolume (MSFV) method to solve elliptic problems with a plurality of spatial scales arising from single or multiphase flows in porous media is provided. The method efficiently... 

7492664 
Method for processing acoustic reflections in array data to image nearborehole geological structure
A method and apparatus for enhancing the moveout between a direct wave and a reflected wave. The method involves transmitting imaging signals into a body to be imaged and receiving the resulting... 

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... 

7460437 
Seismic data processing method and system for migration of seismic signals incorporating azimuthal variations in the velocity
A method and system for seismic data processing utilizes azimuthal variations in the velocity of seismic signals. The system and method utilizes a plurality of seismic energy sources that are... 

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... 

7379385 
Processing of seismic data acquired using over/under streamers and/or over/under sources
Implementations of various techniques for processing seismic data acquired by three or more over/under streamers. In one implementation, the seismic data may be processed by grouping the seismic... 

7359284 
Method for processing borehole seismic data
Seismic data recorded by subsurface seismic sensors placed in a borehole, such as an oil or gas well, are transformed via a process of upward wavefield propagation to pseudoreceivers at the... 

7315783 
Traveltime calculation in three dimensional transversely isotropic (3D TI) media by the fast marching method
A technique for calculating traveltime of a seismic wave in three dimensional tilted transversely isotropic (3D TI) media includes determining a wave vector, defining a unit vector, calculating an... 

7283422 
Systems for low frequency seismic and infrasound detection of geopressure transition zones
Methods for determining the existence and characteristics of a gradational pressurized zone within a subterranean formation are disclosed. One embodiment involves employing an attenuation... 