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| Number | Title | Issue Date |
| 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 seismic sources and a three component (3C) directional receiver. A disclos... | 04/10/2012 |
| 8098543 | Estimation of stress and elastic parameters Various implementations described herein are directed to estimating stresses and elastic parameters in a formation based on seismic data. In one implementation, wide azimuth seismic data may be used to derive anisotropic elastic parameters. Furthermore, stresses may... | 01/17/2012 |
| 8072841 | Adaptive wavefront reconstruction A method for generating a synthetic seismogram. In one implementation, a ray tracing may be performed on a subsurface. The ray tracing may generate a plurality of rays. A first seismic wavefront may be reconstructed by triangulating a first plurality of control poin... | 12/06/2011 |
| 7894300 | Fluid characterization from acoustic logging data A method and system for fluid characterization in an underground formation surrounding a borehole are provided. Acoustic signals are transmitted and received in the borehole. The received acoustic signals are processed to obtain at least one attribute of formation m... | 02/22/2011 |
| 7876643 | Methods of hydrocarbon detection using wavelet dominant frequency and a measure of energy loss on the high-frequency side of wavelet dominant frequency A method in accordance with one embodiment of the invention includes obtaining seismic trace data for a region of interest; processing the seismic trace data to calculate at least one spectrum for at least one sample from the seismic data; calculating at least one d... | 01/25/2011 |
| 7791981 | Velocity analysis for VSP data A method for providing a velocity profile for a subsurface region that includes the reflective interfaces, the method comprising the steps of: providing a set of data comprising signals transmitted by a transmitter and collected at a receiver, wherein the data inclu... | 09/07/2010 |
| 7773456 | System and method for seismic data acquisition There is provided herein a system and method for the imaging and monitoring of hydrocarbon reservoirs and other subsurface features preferably using seabed or surface sensors in conjunction with one or more downhole sensors. In one preferred embodiment, recordings w... | 08/10/2010 |
| 7751280 | Determining wellbore position within subsurface earth structures and updating models of such structures using azimuthal formation measurements A method for determining structure in the Earth's subsurface includes generating an initial model of the structure. The initial model includes at least one layer boundary. A wellbore is drilled along a selected trajectory through the Earth's subsurface in a volume r... | 07/06/2010 |
| 7697373 | Method for deriving 3D output volumes using dip vector analysis A method and computer instructions on computer readable media for determining and analyzing spatial changes in the earth's subsurface associated with dip vectors measured using 3D data in regions near a fluid contact or seismic flat spot event. The method obtains se... | 04/13/2010 |
| 7675818 | Method for tomographic inversion by matrix transformation Method for reducing instability and increasing computational efficiency in tomographic inversion for velocity model building. A system of tomographic equations is developed for a uniform grid. A non-uniform parameterization is found for which a linear mapping exists... | 03/09/2010 |
| 7675817 | Hydrocarbon saturation determination using acoustic velocities obtained through casing Compressional and shear velocities of earth formations are measured through casing. The determined compressional and shear velocities are used in a two component mixing model to provides improved quantitative values for the solid, the dry frame, and the pore compres... | 03/09/2010 |
| 7586811 | Subsalt velocity model building Method for building a subsalt velocity model. In one implementation, the method may include determining a velocity of a sedimentary area surrounding a salt body, determining an initial velocity of a subsalt sedimentary area disposed below the salt body by interpolat... | 09/08/2009 |
| 7480206 | Methods for earth modeling and seismic imaging using interactive and selective updating A method for creating an enhanced seismic image is described. Seismic data is acquired from a seismic survey conducted over a subterranean region. The seismic data is transformed into energy components, preferably Gaussian beam components. An earth model is created ... | 01/20/2009 |
| 7463552 | Method for deriving 3D output volumes using filters derived from flat spot direction vectors A method of determining the existence of and location of hydrocarbon and water fluid contacts by analyzing spatial changes in 3D seismic data. The method begins by obtaining seismic attribute data as a 3D data volume. Then the method derives 3D dip and azimuth as a ... | 12/09/2008 |
| 7453767 | Method for deriving a 3D GRAZ seismic attribute file A method of determining and analyzing spatial changes in the earth's subsurface. The method includes obtaining seismic attribute data as a 3D data volume and obtaining corresponding 3D dip and azimuth as a 3D volume and obtain corresponding 3D reliability volumes or... | 11/18/2008 |
| 7453766 | Method for deriving 3D output volumes using summation along flat spot dip vectors A method of determining and analyzing spatial changes in the earth's subsurface. The method includes obtaining seismic attribute data as a 3D data volume and obtaining corresponding 3D dip and azimuth as a 3D volume and obtain corresponding 3D reliability volumes or... | 11/18/2008 |
| 7424367 | Method for predicting lithology and porosity from seismic reflection data Method for predicting lithology and porosity of subsurface rocks from seismic reflection data. The seismic data is inverted to yield elastic properties of the rocks such as the compressional and shear impedances. A rock physics model is built to relate porosity, the... | 09/09/2008 |
| 7391675 | Microseismic event detection and location by continuous map migration The present invention provides methods and systems for microseismic hydraulic fracture monitoring in real-time. The methods and systems of the present invention may include continuous map migration of recorded microseismic signals. The methods and systems provide ro... | 06/24/2008 |
| 7388808 | Method for depth migrating seismic data using pre-stack time migration, demigration, and post-stack depth migration A method is disclosed for depth migrating seismic data. The method includes pre-stack time migrating the seismic data to form a stacked, time migrated image. The stacked, time migrated image is demigrated, and post-stack depth migration is then performed on the demi... | 06/17/2008 |
| 7373251 | Method for predicting quantitative values of a rock or fluid property in a reservoir using seismic data A method is provided for predicting a value of a designated rock or fluid property in a subterranean geologic volume. A first predicted value of the designated rock or fluid property is also assigned to a volume of a multi-dimensional, multi-scale model. A first pre... | 05/13/2008 |
| 7366054 | Tau-P filters for removal of noise from seismic data Methods of processing seismic data to remove unwanted noise from meaningful reflection signals are provided for. The methods comprise the steps of assembling seismic data into common geometry gathers in an offset-time domain without correcting the data for normal mo... | 04/29/2008 |
| 7363158 | Method for creating a stratigraphic model using pseudocores created from borehole images A method for creating a stratigraphic model is provided. A core is obtained from a wellbore and a detailed graphic core description is created. Wireline data, including a borehole image, is obtained for a cored interval corresponding to the core and processed into a... | 04/22/2008 |
| 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 surface of the earth. The seismic data thus transformed can be processed as... | 04/15/2008 |
| 7355923 | Seismic analysis using post-imaging seismic anisotropy corrections System and method for performing anisotropy corrections of post-imaging seismic data for a subsurface formation. The method may receive seismic data, preferably pre-stack seismic data comprising a plurality of traces, e.g., collected from a plurality of source and r... | 04/08/2008 |
| 7352370 | Four-dimensional volume of interest A method and apparatus for representing a deformable volume of interest in four dimensions is described, where the four dimensions are three spatial dimensions and one temporal dimension including discrete points in time, and where the deformable volume of interest ... | 04/01/2008 |
| 7337069 | Method of simulating the sedimentary deposition in a basin respecting the thicknesses of the sedimentary sequences The method of the invention allows, by means of an iterative inversion algorithm, prediction of the spatial distribution of the lithologic composition of sediments deposited in a sedimentary basin during a geologic time interval, and the temporal evolution of the de... | 02/26/2008 |
| 7337070 | Method for treating seismic cubes corresponding to obtained for common zone at different times Method of processing a collection of seismic cubes corresponding to one and the same acquisition zone and to various moments of acquisition, characterized in that at least one seismic cube which is an estimate of the component common to at least two seismic cubes co... | 02/26/2008 |
| 7337067 | System and method for attaching drilling information to three-dimensional visualizations of earth models A system and method for perceiving drilling learning through visualization is provided. In one embodiment using three-dimensional visualization of the earth model as a foundation, a new IT development strategy focuses on perceiving “Drilling Learning” by an intu... | 02/26/2008 |
| 7336561 | System for attenuation of water bottom multiples in seismic data recorded by pressure sensors and particle motion sensors An up-going wavefield and a down-going wavefield are calculated at a sensor position from a pressure sensor signal and a particle motion sensor signal. Then, an up-going wavefield is calculated at a water bottom position substantially without water bottom multiples ... | 02/26/2008 |
| 7328139 | Device and software package for extracting a geological horizon and related properties The invention concerns a method for extracting a geological horizon and related properties of a seismic representation, comprising a step (100) which consists in digital modeling with continuous local seismic traces, calculating the optimal offset and definin... | 02/05/2008 |
| 7324898 | System and method for determining a more accurate resistivity model of a geological formation using time-lapse well logging data A system and a method for estimating a model of a geological formation are provided. The geological formation has a wellbore extending therethrough. The method includes obtaining a first resistivity log associated with the geological formation from a LWD sensor in t... | 01/29/2008 |
| 7317989 | Method and apparatus for chemometric estimations of fluid density, viscosity, dielectric constant, and resistivity from mechanical resonator data The present invention provides a chemometric equation to estimate fluid density, viscosity, dielectric constant and resistivity for a formation fluid sample downhole. The chemometric estimates can be used directly as estimated values for fluid density, viscosity, di... | 01/08/2008 |
| 7310579 | Method for generating a reservoir model on flexible grid A method having application notably to the development of petroleum reservoirs for fast generation of a geostatistical reservoir model on flexible grid, representative of a porous heterogeneous medium. A flexible grid best discretizing the medium is first generated.... | 12/18/2007 |
| 7295930 | Method, device and software package for smoothing a subsurface property The invention concerns a method for smoothing a subsurface property in a geological structure represented by seismic measurements comprising a step (100) which consists in digital modelling by continuous local seismic traces, calculating an optimal offset and... | 11/13/2007 |
| 7283941 | Computer system and method for modeling fluid depletion A method for modeling fluid depletion in a reservoir is disclosed. A map is divided into cells. For each of the cells a value is stored that is based at least in part on a physical characteristic of the cell. At least one cell that contains a depletion location is i... | 10/16/2007 |
| 7283911 | System and method for interpreting reverse faults and multiple z-valued seismic horizons A system and method for interpreting reverse faults and multiple z-valued seismic horizons. A platform executable on a computer is provided for interpreting seismic data. The platform includes a user input module for accepting user inputs related to interpretation o... | 10/16/2007 |
| 7274990 | Downhole library of master wavelets for VSP-while-drilling applications A controllable seismic source is used in a seismic-while-drilling system for obtaining VSP data. Coded information is sent downhole about the signal generated by said controllable source. The information about the seismic source is used for reconstructing the source... | 09/25/2007 |
| 7266041 | Multi-attribute background relative scanning of 3D geophysical datasets for locally anomaluous data points Methods for scanning geophysical data sets to find geological entities with specific geophysical responses entail selecting a focus sub-volume and a background sub-volume proximal to the focus sub-volume. The sub-volumes include discrete sampling locations and are l... | 09/04/2007 |
| 7261167 | Method and system for predicting performance of a drilling system for a given formation A method and apparatus for predicting the performance of a drilling system for the drilling of a well bore in a given formation is disclosed. The method generates a geology model of a given formation. The geology model includes a geology characteristic of the given ... | 08/28/2007 |
| 7254091 | Method for estimating and/or reducing uncertainty in reservoir models of potential petroleum reservoirs A method for estimating and/or reducing uncertainty in reservoir models of potential petroleum reservoirs comprises receiving the results of a stochastic seismic inversion, and transforming the inversion data into a form suitable for reservoir modelling and flow sim... | 08/07/2007 |
