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| Application No. | Application Title | Issue Date |
| 20120127827 | TECHNIQUE AND SYSTEM FOR PERFORMING A CROSS WELL SURVEY A technique includes providing a source in a first well and a seismic receiver in a second well to detect a seismic event that is caused by the source. The technique includes referencing clocks in the source and receiver to a common reference time frame and determining ... | 05/24/2012 |
| 20120026831 | METHOD AND APPARATUS FOR MEASURING FORMATION ANISOTROPY WHILE DRILLING A logging system for measuring anisotrophic properties of the materials penetrated by a borehole. A downhole or “logging tool” element of the system comprises a source section that comprises either a unipole or a dipole acoustic source. The receiver section comprise... | 02/02/2012 |
| 20120014214 | TIME REVERSE IMAGING OPERATORS FOR SOURCE LOCATION WITH BOREHOLE DATA A method and system for processing synchronous array seismic data includes acquiring synchronous passive seismic data from a plurality of sensors to obtain synchronized array measurements. A reverse-time data propagation process is applied to the synchronized array meas... | 01/19/2012 |
| 20110305110 | SYSTEM AND METHOD FOR GENERATING TRUE DEPTH SEISMIC SURVEYS A surface seismic survey is generated or obtained from Earth's surface and is based on time in which acoustic waves are reflected to Earth's surface. One or more tools measure density and sonic velocity of a subsurface formation. An estimate of acoustic impedance is obt... | 12/15/2011 |
| 20110292763 | DETECTION OF SEISMIC SIGNALS USING FIBER OPTIC DISTRIBUTED SENSORS A fiber optic distributed vibration system for detecting seismic signals in an earth formation is provided. The system includes a fiber optic cable deployed in a borehole that extends into the earth formation and which is configured to react along its length to a seismi... | 12/01/2011 |
| 20110286304 | Downhole Acoustic Emission Formation Sampling A method, system and apparatus for testing properties of a rock formation surrounding a wellbore in situ. The apparatus includes a tool body, one or more indenters, and one or more acoustic sensors. The body includes an outer surface that defines one or more cavities th... | 11/24/2011 |
| 20110280101 | UNIPOLE AND BIPOLE ACOUSTIC LOGGING WHILE DRILLING TOOLS An acoustic logging while drilling tool includes a single unipole acoustic transmitter longitudinally and azimuthally spaced apart from a single linear array of unipole acoustic receivers. In certain preferred embodiments, the linear array of unipole receivers is azimut... | 11/17/2011 |
| 20110267921 | 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 velocities of wave propagation in proximity to the wellbore, determining an acqui... | 11/03/2011 |
| 20110267922 | MECHANICAL TUBE WAVE SOURCES AND METHODS OF USE FOR LIQUID FILLED BOREHOLES The current application discloses methods and systems for generating mechanical tube waves in fluid filled boreholes penetrating subterranean formations. In one embodiment, the system of the current application comprises an energy storage chamber; a fast operating valve... | 11/03/2011 |
| 20110222368 | Detecting Seismic Data in a Wellbore In one general embodiment, a seismic tool system includes a cable adapted to be deployed within a borehole; and one or more seismic tools suspendable from the cable in the borehole. At least one of the seismic tools includes at least one seismic sensor enclosed within a... | 09/15/2011 |
| 20110214869 | Active Seismic Monitoring of Fracturing Operations A method for managing a fracturing operation. In one implementation, the method may include positioning a seismic source and at least one seismic receiver near a hydrocarbon reservoir; pumping a fracturing fluid into a well bore of the hydrocarbon reservoir such that th... | 09/08/2011 |
| 20110182141 | METHOD AND SYSTEM FOR MONITORING A LOGGING TOOL POSITION IN A BOREHOLE The invention relates to the area of borehole acoustics, in particular, to monitoring a logging tool position in a borehole, namely detection and estimation of a borehole logging tool eccentricity based on the measurement and analysis of mixed surface waves waveforms. T... | 07/28/2011 |
| 20110170372 | WALKAWAY VSP CALIBRATED SONIC LOGS Methods and related systems are described relating to processing subsurface sonic and seismic data. The described techniques use anisotropy estimates derived from a walkaway VSP to calibrate elastic properties derived from sonic logs. An empirical relationship between t... | 07/14/2011 |
| 20110141848 | Optimizing a Seismic Survey for Source Separation A technique includes determining at least one parameter that characterizes a seismic survey in which multiple interfering seismic sources are fired and seismic sensors sense energy that is produced by the seismic sources. The determination of the parameter(s) includes o... | 06/16/2011 |
| 20110085415 | METHOD FOR SYNCHRONIZING SEISMIC DATA RECORDED BY TWO OR MORE SEPARATE RECORDING SYSTEMS A method for synchronizing recordings of seismic sensor signals between at least two time indexed recording units includes cross-correlating signals recorded by each of a first and a second recording unit from a same reference sensor. The reference sensor is deployed pr... | 04/14/2011 |
| 20110073368 | Reduction of Tool Mode and Drilling Noise In Acoustic LWD A downhole measurement tool includes at least one regular receiver and at least one reference receiver externally deployed on a tool body. The reference receiver is configured to be acoustically isolated from the borehole, for example, via an isolation structure includi... | 03/31/2011 |
| 20100322029 | SYSTEM FOR GENERATING A BEAM OF ACOUSTIC ENERGY FROM A BOREHOLE, AND APPLICATIONS THEREOF In some aspects of the invention, a device, positioned within a well bore, configured to generate and direct an acoustic beam into a rock formation around a borehole is disclosed. The device comprises a source configured to generate a first signal at a first frequency a... | 12/23/2010 |
| 20100315899 | SELF-STABILIZING DYNAMIC DIAPHRAGM FOR BROAD BANDWIDTH ACOUSTIC ENERGY SOURCE An apparatus for estimating a property in a borehole penetrating the earth, the apparatus having: a carrier configured to be disposed in the borehole; and an acoustic transducer disposed at the carrier and configured to at least one of transmit and receive an acoustic w... | 12/16/2010 |
| 20100315901 | 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 downhole location on a bottomhole assembly in a borehole in response to t... | 12/16/2010 |
| 20100307741 | TOOL FOR DOWNHOLE FORMATION EVALUATION An apparatus for determining a property of a downhole formation, the apparatus comprising: an array having a plurality of transmitters and receivers capable of propagating electromagnetic waves through the formation; measuring circuitry for measuring an effect of the fo... | 12/09/2010 |
| 20100296366 | METHODS AND SYSTEMS FOR SEISMIC SIGNAL DETECTION Methods and systems utilizing seismic sensors configured or designed for use in seismic signal detection. An electrical current is applied to a seismic sensor such that the moving coil is located at a neutral position relative to the magnetic field in the seismic sensor... | 11/25/2010 |
| 20100238763 | SINGLE WELL RESERVOIR CHARACTERIZATION APPARATUS AND METHODS An apparatus and a method for characterizing parts of a reservoir surrounding a borehole are provided including using at least one transmitter to emit a probing signal into the borehole and at least one receiver to receive a signal representing a response of the formati... | 09/23/2010 |
| 20100238764 | METHOD AND SYSTEM TO DETERMINE THE GEO-STRESSES REGIME FACTOR Q FROM BOREHOLE SONIC MEASUREMENT MODELING Methods and systems for analyzing subterranean formations in-situ stress are disclosed. A method for extracting geological horizon on-demand from a 3D seismic data set, comprises receiving sonic log data; computing the anisotropic shear moduli C44, C55 <... | 09/23/2010 |
| 20100195436 | METHODS AND SYSTEMS FOR DEPLOYING SEISMIC DEVICES Methods and systems for acoustically determining reservoir parameters of subterranean formations. A tool comprising at least one seismic source or seismic receiver mounted thereon; a conveyance configured for movement of the acoustic tool in a borehole traversing the su... | 08/05/2010 |
| 20100165788 | ACOUSTIC TRANSCEIVER ASSEMBLY WITH BLOCKING ELEMENT An acoustic transceiver assembly including a housing, an oscillator, and a blocking element. The housing has at least one inner wall defining a cavity. The cavity has a first end and a second end defining an axis of said acoustic transceiver assembly. The oscillator is ... | 07/01/2010 |
| 20100149913 | ANALYSIS OF FRACTURE NETWORKS A method of analysing the dynamic behaviour of fracture networks in a seismic volume is provided. The method includes providing a plurality of seismic time lapse vintages of the same geological volume; identifying and parameterising fractures within fracture networks of... | 06/17/2010 |
| 20100153015 | VH reservoir mapping A method and system of detecting and mapping a subsurface hydrocarbon reservoir includes determining ratio data for a plurality of orthogonal spectral components of naturally occurring low frequency background seismic data. The ratio data may be compared, plotted, conto... | 06/17/2010 |
| 20100142319 | Electromagnetic Linear Drive Source for Logging-While-Drilling/Wireline Acoustic Applications An apparatus and method for providing a downhole acoustic source is disclosed. The acoustic source includes a piston configured to oscillate in an axial direction of the acoustic source and produce an acoustic signal in a medium in contact with an exterior surface of th... | 06/10/2010 |
| 20100027376 | Optimizing Seismic Processing and Amplitude Inversion Utilizing Statistical Comparisons of Seismic to Well Control Data A method for obtaining enhanced seismic data and optimized inverted reflectivities includes computing statistical well characterizations based upon band-limited well reflectivities for a subsurface region. Sets of processed seismic data are computed by applying differin... | 02/04/2010 |
| 20100020638 | MONOPOLE ACOUSTIC TRANSMITTER RING COMPRISING PIEZOELECTRIC MATERIAL A monopole acoustic transmitter for logging-while-drilling comprising as a ring that comprises one or more piezoelectric arc segments. The ring is oriented in a plane whose normal is essentially coincident with the major axis of a logging tool in which it is disposed. T... | 01/28/2010 |
| 20100014381 | OPTIMIZING A SEISMIC SURVEY FOR SOURCE SEPARATION A technique includes determining at least one parameter that characterizes a seismic survey in which multiple interfering seismic sources are fired and seismic sensors sense energy that is produced by the seismic sources. The determination of the parameter(s) includes o... | 01/21/2010 |
| 20100002540 | DEVICE AND METHOD FOR GENERATING A BEAM OF ACOUSTIC ENERGY FROM ABOREHOLE, AND APPLICATION THEREOF In some aspects of the invention, a device, positioned within a well bore, configured to generate and direct an acoustic beam into a rock formation around a borehole is disclosed. The device comprises a source configured to generate a first signal at a first frequency a... | 01/07/2010 |
| 20090277630 | ANALYSIS OF RADAR RANGING DATA FROM A DOWN HOLE RADAR RANGING TOOL FOR DETERMINING WIDTH, HEIGHT, AND LENGTH OF A SUBTERRANEAN FRACTURE Radar ranging data are collected from a down hole tool at various depths in a fractured well bore, and analyzed to provide a profile of the length of each wing of the fracture as a function of depth. The height of the fracture is determined from the vertical positions w... | 11/12/2009 |
| 20090274005 | 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 sources through the multi-layered system; receiving signals emanating from the... | 11/05/2009 |
| 20090257307 | AUTOMATED MUD SLOWNESS ESTIMATION An integrated framework is described for automating some or all of mud slowness estimation for both fast and slow formations. An estimation of fluid slowness based on monopole radial profiling is calculated if conditions permit. Alternatively, an estimation of fluid slo... | 10/15/2009 |
| 20090236145 | ANALYSIS REFRACTED ACOUSTIC WAVES MEASURED IN A BOREHOLE Methods and related systems are described for measuring and analyzing refracted acoustic energy. A plurality of receivers mounted are on a downhole tool, and are arranged and adapted to receive refracted acoustic energy from a downhole formation. Measurements of refract... | 09/24/2009 |
| 20090238043 | GEOPHONE SECUREMENT MECHANISM A seismic sensor comprising a coil assembly suspended in a magnet field produced by a magnet assembly, and a locking mechanism for preventing the coil assembly from moving freely until a seismic event is initiated at the surface or within an earth formation to collect s... | 09/24/2009 |
| 20090185445 | BOREHOLE APPARATUS AND METHODS FOR SIMULTANEOUS MULTIMODE EXCITATION AND RECEPTION TO DETERMINE ELASTIC WAVE VELOCITIES, ELASTIC MODULII, DEGREE OF ANISOTROPY AND ELASTIC SYMMETRY CONFIGURATIONS An acoustic borehole logging system for generation and detection of multipole modes used to determine elastic properties of earth formations characterized as inhomogeneous anisotropic solids. The system concurrently generates and senses monopole, dipole, quadrupole and ... | 07/23/2009 |
| 20090154290 | METHOD FOR ENHANCING LOW FREQUENCY OUTPUT OF IMPULSIVE TYPE SEISMIC ENERGY SOURCES AND ITS APPLICATION TO A SEISMIC ENERGY SOURCE FOR USE WHILE DRILLING A method for operating an impulsive type seismic energy source in a firing sequence having at least two actuations for each seismic impulse to be generated by the source. The actuations have a time delay between them related to a selected energy frequency peak of the so... | 06/18/2009 |
| 20090129203 | MONOPOLE ACOUSTIC TRANSMITTER COMPRISING A PLURALITY OF PIEZOELECTRIC DISCS A monopole acoustic transmitter with at least one disc assembly with a plurality of piezoelectric discs configured to optimized acoustic pressure output within a desired frequency range while meeting physical restrictions of LWD and MWD logging systems. The transmitter ... | 05/21/2009 |
