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8995224 Real-time velocity and pore-pressure 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 Q-factor estimation from VSP data  
A zero-offset 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 computer-readable 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 Real-time reflection point density mapping during three-dimensional (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 S-wave 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 normal-moveout (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 three-dimensional images of non-linear acoustic properties in a region remote from a borehole  
In some aspects of the disclosure, a method for creating three-dimensional images of non-linear properties and the compressional to shear velocity ratio in a region remote from a borehole using a...
8238195 Method for 3-C 3-D wavefield decomposition  
An apparatus and a method for processing of three components, 3-Dimensions seismic (3-C, 3-D) data acquired by down-hole 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 Model-based relative bearing estimation of three-component receivers  
A method is disclosed for more accurately determining the relative bearing angle of a directional receiver in a borehole using an existing three-dimensional (3D) geological model, one or more...
8077546 Method for monitoring a multi-layered system  
A method for monitoring a multi-layered 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 mud-pulse telemetry  
Channel estimation and signal equalization is used in a mud-pulse telemetry system for uplink communication during drilling of wellbores.
7911878 Sub-salt 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 3-component 3-dimensional Kirchhoff prestack migration  
An apparatus and a method for migration of three components, 3-Dimensions seismic (3-C, 3-D) data acquired by down-hole receivers and surface seismic sources. This method utilizes full 3...
7751279 Sub-salt 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 pseudo-receivers at the...
7710822 Vertical seismic profiling method utilizing seismic communication and synchronization  
A while-drilling 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 free-surface related downgoing multiples from VSP data  
1st order free-surface multiples recorded in VSP data or reverse VSP data are processed using a 3-C 3-D 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 3-component (3-C) VSP data detects heterogeneities in the proximity of a borehole. A method for seismic exploration of a pre-determined 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 VSP-WD (Vertical Seismic Profiling—While Drilling) first breaks in absolute time is described. By combining a seismic surface source and firing complex seismic pattern...
7602669 Tube-wave 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 tube-wave...
7542373 Vector 3-component 3-dimensional kirchhoff prestack migration  
An apparatus and a method for migration of three components, 3-Dimensions seismic (3-C, 3-D) data acquired by down-hole receivers and surface seismic sources. This method utilizes full 3...
7535800 Seismic imaging and tomography using seabed energy sources  
In-sea 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 P-wave slowness-polarization data set resolving P-wave slowness against P-wave polarization angle is extracted from a multi-offset vertical seismic profiling data set. A function relating P-wave...
7496488 Multi-scale finite-volume method for use in subsurface flow simulation  
A multi-scale finite-volume (MSFV) method to solve elliptic problems with a plurality of spatial scales arising from single or multi-phase flows in porous media is provided. The method efficiently...
7492664 Method for processing acoustic reflections in array data to image near-borehole 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 low-velocity 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 pseudo-receivers 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 geo-pressure 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...

Matches 1 - 50 out of 163 1 2 3 4 >