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Document Title 

9043154 
Computerbased method for realtime threedimensional geological model calculation and reservoir navigation
A method of calculating a 3D geologic model in real time using, as input, 2D geologic data. The 3D is used for conducting further drilling operations. The model may be updated in real time... 

8849572 
Apparatus for determining the concentration of a conductive fluid present in a fluid filled borehole
An apparatus for determining the concentration of a conductive fluid present in a fluid filled bore hole is described. Such apparatus are known as water holdup meters and are frequently used in... 

8829907 
Frequency filtering and adjustment of electromagnetically received signals from antennas
An apparatus for estimating a property of an earth formation penetrated by a borehole, the apparatus having: a carrier configured to be conveyed through the borehole; a transmitter disposed at the... 

8805617 
Methods and apparatus for characterization of petroleum fluids contaminated with drilling mud
A method and system for characterizing formation fluids contaminated with drilling mud that compensates for the presence of such drilling mud. The operations that characterize formation fluids... 

8797035 
Apparatus and methods for monitoring a core during coring operations
One method of monitoring a formation core during coring operations can include measuring resistivities of a formation internal and external to a core barrel assembly, comparing the resistivities... 

8793072 
Method of monitoring a geological gas storage site by stratigraphic inversion of seismic data
The invention is a method of monitoring an underground formation into which a gas is injected or from which a gas is produced, by a stratigraphic inversion of seismic data with anamorphosis of... 

8614578 
Attenuation of electromagnetic signals passing through conductive material
The present disclosure relates to determining the attenuation of an electromagnetic signal passing through a conductive material. An antenna is provided and placed in relatively close proximity to... 

8571799 
Method for cost effective sampling and characterization of heterogeneous unconventional hydrocarbon regions
A methodology improves sampling and characterization of heterogeneous, unconventional hydrocarbonbearing regions. The methodology is designed to integrate consistently across measurements and... 

8447523 
High speed data transfer for measuring lithology and monitoring drilling operations
A system for determining at least one of a lithology of a formation traversed by a borehole and an operational condition of a component of a drill string disposed in the borehole is disclosed. The... 

8442769 
Method of determining and utilizing high fidelity wellbore trajectory
Various methods are disclosed, comprising obtaining a plurality of raw depth measurements for a wellbore; obtaining survey data about a bottom hole assembly; obtaining depth compensation... 

8386083 
Systems and methods for updating valve cracking current in mass flow controllers
A valve system for a mass flow controller that controls a flow rate of a fluid is disclosed. The valve system includes a valve movable between an open position and a closed position to adjust the... 

8364404 
System and method for displaying data associated with subsurface reservoirs
Method and system for visualizing one or more properties of a subterranean earth formation while drilling a borehole using probability information from a modeling process. Probability waveforms... 

8305243 
Systems and methods for compressing data and controlling data compression in borehole communication
Systems and methods compress data and control data compression in borehole communication. The systems and methods convert original data collected by a sensor from a first domain into a second... 

8301382 
Continuous geomechanically stable wellbore trajectories
A continuous geomechanically stable trajectory in a subterranean formation is found by calculating at least one reachable stable position relative to a starting position based on geological data... 

8290711 
Method of estimating the fracture density in a rock medium
The invention is a method of constructing a threedimensional fracture density log of a porous formation traversed by fractures and a borehole. A number N of intersections between the fractures... 

8245795 
Phase wellbore steering
A method of steering a drilling operation of a well using acoustic measurements. The method includes obtaining, using a central processing unit (CPU), a cleanwet matrix line for the well, where... 

8180571 
Wellbore surveying
This invention relates to surveying wellbores. In particular this invention provides methods of correcting magnetic surveys for the effects introduced by magnetic mud. The method of the present... 

8150663 
Partitioning algorithm for building a stratigraphic grid
Embodiments of the invention provide a system and method for partitioning data for modelling a geological structure including laterally partitioning the data into multiple columns, where each... 

8095318 
Method for estimating formation dip using combined multiaxial induction and formation image measurements
A method for determining dip of rock formations penetrated by a wellbore using multiaxial induction measurements and imaging measurements made from within the wellbore includes estimating dip from... 

8065085 
System and method for measuring depth and velocity of instrumentation within a wellbore using a bendable tool
An apparatus and method for measuring depth, velocity, or both depth and velocity of instrumentation within a wellbore is provided. The apparatus includes a downhole portion movable within the... 

8050867 
Data adaptive vibratory source acquisition method
Method for conducting a seismic survey (23) wherein the acquisition parameters are modified as the survey progresses using information (24) from sensors located to monitor structures and fixtures... 

7805247 
System and methods for well data compression
Systems and methods in which data compression techniques are utilized to fill a predetermined channel capacity are shown. According to one configuration, event data points within test data are... 

7765067 
Geosteering in earth formations using multicomponent induction measurements
A multicomponent induction logging tool is used on a MWD bottomhole assembly. Multifrequency focusing that accounts for the finite, nonzero, conductivity of the mandrel is applied. Using... 

7640111 
Method and system for interpreting borehole geological data
Computerbased method and system are disclosed for interpreting dips, dip trends, and mineral based lithofacies data to identify certain geological events in a subsurface formation. The disclosed... 

7546209 
Formation dip geosteering method
A method of drilling a well. The method includes calculating an estimated formation dip angle, wherein said estimated formation dip angle being based on offset well data, seismic data, core data,... 

7487047 
Method of interpreting well data
A geospatial modeling system may include a geospatial model database and a processor cooperating therewith for performing at least one noise filtering operation on data comprising elevations... 

7379854 
Method of conditioning a random field to have directionally varying anisotropic continuity
The present invention is a method of generating a model of a random field which has directionally varying continuity. First, a tentative model for the random field is specified. Second, connected... 

7340418 
Visual database for linking geography to seismic data
A medium having a plurality of computer readable files relating to geophysical seismic data recorded thereon. The files include a map display having multiple levels of geographic detail and... 

7289938 
Method and a device for detecting discontinuities in a medium
A method and a device for detecting discontinuities in a medium by detecting maxima, e.g. in an echo signal of an ultrasound excitation of the media, with maxima corresponding to a given... 

7283910 
Incremental depth measurement for realtime calculation of dip and azimuth
The present invention provides a method and apparatus for logging an earth formation and acquiring subsurface information wherein a logging tool is conveyed in borehole to obtain parameters of... 

7254486 
Method and apparatus for shale bed detection in deviated and horizontal wellbores
A relative dip angle of a deviated borehole is determined from natural gamma ray measurements. Dip corrected measurements are processed to determine the thickness of thin beds, and the peak gamma... 

7249007 
Weather and climate variable prediction for management of weather and climate risk
A method for simulating the statistical behavior of atmospheric, meteorological, or other geophysical time series having the following steps: (a) assembling an ensemble of observed data; (b)... 

7236887 
Method of determining planar events from borehole or core images
The present invention relates to a userguided dip picking method from electrical borehole images using Hough Transform. It includes defining a top and bottom reference curve, applying the Hough... 

7200492 
Apparent dip angle calculation and image compression based on region of interest
The present invention provides a method and apparatus for logging an earth formation and acquiring subsurface information wherein a logging tool is conveyed in borehole to obtain parameters of... 

7164990 
Method of determining fluid flow
A method of determining fluid flow in a volume containing two or more fluid components, including determining a pressure field for the volume. One or more streamlines are determined from the... 

7124029 
Method for evaluating formation properties
Methods for evaluating the properties of formations surrounding a borehole, include the steps of measuring electrical properties of the formation from within the borehole; deriving a model of... 

7110323 
Method, system and apparatus for interpreting seismic data using duplex waves
A Method for Interpreting Seismic Data Using Duplex Waves is described. Whereas substantially horizontal boundaries are readily identified using conventional processing methods based on primary... 

7027923 
Method for determining sonde error for an induction or propagation tool with transverse or triaxial arrays
A method for determining a sonde error in a logging tool comprising a transverse array includes obtaining a first measurement using the transverse array while the logging tool is at a first height... 

7002484 
Supplemental referencing techniques in borehole surveying
A method for surveying a borehole is disclosed which uses first and second gravity measurement devices disposed at corresponding first and second positions in the borehole and a supplemental... 

6907348 
Synthetic acoustic array acquisition and processing
The present invention provides a method of determining a property of an earth formation using an acoustic logging tool on a bottomhole assembly (BHA) in a borehole in the earth formation. At least... 

6882937 
Downhole referencing techniques in borehole surveying
A method for determining rotational offset between first and second gravity measurement devices deployed on a downhole tool is disclosed. The method includes positioning the tool in a previously... 

6856910 
Method and apparatus for determining regional dip properties
A method for determining a formation dip angle including extracting features from an acquired well log to obtain a set of features, validating the set of features to obtain a subset of features,... 

6795774 
Method for asymptotic dipping correction
Induction and other resistivity well logging tools determine formation conductivity at various depths but these measurements contain pronounced errors when the tool is proximate to an inclined... 

6754587 
Method for processing seismic data
A method is provided for processing a seismic 3D measurement data set, consisting of a multitude of seismic traces, each having a sequence of amplitude values or data points provided with... 

6643589 
Simultaneous determination of formation angles and anisotropic resistivity using multicomponent induction logging data
Measurements made by a multicomponent logging tool in a borehole are inverted to obtain horizontal and vertical resistivities and formation dip and azimuth angles of a formation traversed by the... 

6584408 
Subsurface formation parameters from triaxial measurements
Systems and methods are provided for determining various subsurface formation parameters from electromagnetic measurements. Formulas are disclosed for field components in a coordinate system tied... 

6408299 
Type convertor registry
A generalized mechanism manages adhoc type conversions in computer software. A management framework improves type conversion tasks by enabling the modularization of this task by partitioning the... 

6405136 
Data compression method for use in wellbore and formation characterization
A method is disclosed for compressing a frame of data representing parameter values, a time at which each parameter value was recorded, and an orientation of a sensor at the time each parameter... 

6393364 
Determination of conductivity in anisotropic dipping formations from magnetic coupling measurements
A method is disclosed for the determination of horizontal resistivity, vertical resistivity, dip and strike angles of anisotropic earth formations surrounding a wellbore. Electromagnetic couplings... 

6385545 
Method and apparatus for determining dip angle and horizontal and vertical conductivities
The present invention is directed to a method and apparatus for determining the dip angle and horizontal and vertical conductivities of a wellbore during drilling operations. If the dip angle is... 