Abstract: An induction logging tool having transmitter and receiver antennas is used to make measurements of earth formations. The antennas may be mounted on the mandrel of a bottomhole assembly for MWD applications, or may be pad mounted for wireline applications. The induction measurements are inverted using a linearized model. The model parameters are determined in part from caliper measurements.

Abstract: Embodiments of the present invention provide methods for correlating well logs. More specifically, but not by way of limitation, in an embodiment of the present invention, data from two or more overlapping logs may be generated by a well logging device and a model for the apparent compliance of the elongate member (e.g. the drill string), which controls the position of the logging device, may be combined to correlate the log data.

Abstract: The present invention provides a method and apparatus for logging an earth formation and acquiring subsurface information wherein a logging tool is conveyed in a borehole to obtain parameters of interest. The parameters of interest obtained may be density, acoustic, magnetic or electrical values as known in the art. As necessary, azimuths associated with the measurements are obtained and corrections applied. The corrected data may be filtered and/or smoothed. The parameters of interest associated with azimuthal sectors are depth matched, resolution matched and filtered, and the acquisition effects removed. The data are denoised using a multi-resolution wavelet transform. The data acquired with separate transducers are resolution matched to obtain a resolution matched data series. Subsequently the resolution matched data may be further denoised using a multi-resolution wavelet transform.

Abstract: A method for locally determining a profile of geological horizons includes a step (100) which consists in digital modeling with continuous local seismic traces, calculating an optimal offset and defining a conditional neighborhood of a reference central continuous local seismic trace; a step (101) which consists in defining residuals relative to the reference central continuous local seismic trace; a third step (102) which consists in minimizing the set of residuals on the conditional neighborhood and a fourth step (103) which consists in determining parametric coefficients corresponding to the minimization of the set of residuals on the conditional neighborhood carried out at step (102).

Abstract: The invention relates to a method for packing and filtering geophysical events read on multi-domain records, with distribution of said events into families each having a particular geophysical significance: iso-offset or iso-incidence angle data cubes, elastic parameter cubes derived from a joint stratigraphic inversion and the like, in order to extract therefrom data on the type of subsoil, using a multivariate statistical technique. The method essentially comprises forming, by combination of geophysical variables, synthetic variables much fewer in number, which are obtained by constructing an orthogonal vector base in each of the sets of analysis constituted by the data of each of the families, wherefrom is derived the formation of an orthonormal vector base (new attributes) for filtering and describing said geophysical events. The invention is applicable to geological interpretation or to interpretation of an underground reservoir, from seismic measurements or logs for example.

Abstract: This invention is the NOAA Deep ocean Assessment and Reporting of Tsunami (DART) system, which utilizes a seafloor tsunameter linked to an ocean surface buoy via bi-directional communication system for near real-time measurement and reporting of tsunamis. The buoy is equipped with a bi-directional satellite and acoustic modem communication system for transmitting data between remote locations, such as tsunami warning centers and the tsunameter on the seafloor.

Abstract: A broadcast network for selectively transmitting individualized weather output signals to at least one of a plurality of communicator devices remotely located from the broadcast network. The broadcast network comprises a user input database, a communicator location database, a weather analysis unit, and a communication network. The user input database contains a plurality of predefined user profiles. Each user profile includes a user identifier code. The communicator location database contains real-time data indicative of the spatial locations of the communicator devices. The weather analysis unit compares the spatial locations of the corresponding communicator devices contained in the communicator location database with real-time weather data to generate individualized weather output signals. The communication network receives the user identifier codes and the individualized weather output signals.

Abstract: A method and apparatus for estimating a porosity and a saturation in a subsurface reservoir. The method includes determining a plurality of mathematical relationships relating a plurality of fundamental physical parameters that govern elastic wave propagation in the subsurface reservoir to the porosity and the saturation in the subsurface reservoir, forward modeling a plurality of seismic attributes using the mathematical relationships to derive a plurality of conditional probability density functions for the seismic attributes, applying a Bayesian inversion to the conditional probability density functions for the seismic attributes to derive a joint probability density function for the porosity and the saturation in the subsurface reservoir, and integrating the joint probability density function for the porosity and the saturation to derive a probability density function for the porosity and a probability density function for the saturation.

Abstract: Methods and systems for extracting formation properties from formation logging data is disclosed. A method includes obtaining a deconvolution filter; and processing the formation logging data using the deconvolution filter to produce estimates of the formation properties. The estimates of the formation properties may be further processed with a diffusion filter, which may be an anisotropic diffusion filter. A system for extracting formation properties from formation logging data includes a central processing unit and a memory, wherein the memory stores a program having instructions for performing a method that includes designing a deconvolution filter; and processing the formation logging data using the deconvolution filter to produce estimates of the formation properties.

Abstract: A method for prospecting for oil and gas deposits is provided, said method comprising: outlining of highly permeable collecting basins development zones, performing an aerospace survey of a landscape, determining a spectral reflectivity over the landscape, and incorporating the height profile, block fields, aerospace survey and spectral relativity in order to produce a predictiveis provided.

Abstract: 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 of seismic data and also includes a graphics processing module for displaying to a user graphics related to seismic data. A reverse fault module is provided for enforcing rules governing acceptable multi-z horizon picks. Such rules allow a multiple z-valued horizon to be interpreted as a single horizon. The invention further includes methods for allowing a user to interpret seismic data in a reverse-fault environment. An interpretation of seismic data is displayed and reverse faults and multiple z-valued horizons are created and displayed within the interpretation. A set of reverse-fault environment properties is associated with the reverse faults and the multiple z-valued horizons.

Abstract: Systems and methods for performing source separation are provided. Source separation is performed using a composite signal and a signal dictionary. The composite signal is a mixture of sources received by a sensor. The signal dictionary is a database of filtered basis functions that are formed by the application of directional filters. The directional filters approximate how a particular source will be received by the sensor when the source originates from a particular location. Each source can be characterized by a coefficient and a filtered basis function. The coefficients are unknown when the sources are received by the sensor, but can be estimated using the composite signal and the signal dictionary. Various ones of the sources may be selectively reconstructed or separated using the estimated value of the coefficients.

Abstract: Vehicles or ships each carry a magnetic force line sensor, a GPS position detector, and a data transmitter and travel within an observation area transmitting magnetic field data and position data to an earthquake prediction center. A telluric current induction field estimation unit of the earthquake prediction center estimates telluric current induction fields based on the received observation data. A telluric current estimation unit estimates telluric currents based on the results of estimating the telluric current induction fields. A telluric current induction field intensity change pattern generation unit generates patterns indicating the change over time of the intensity of telluric current induction fields. An earthquake prediction unit analyzes the state of distribution of the telluric currents and the patterns of change in the intensities of the telluric current induction fields and estimates a seismofocal zone, seismic intensity, and time of occurrence of a seismic event.

Abstract: A data-driven method and system to forecast earthquakes worldwide over a broad range of time (from days to years in advance). The system includes the compilation of a diverse set of historical geophysical and environmental databases, a program that determines correlations between earthquake occurrence and the state of other geophysical or environmental phenomenon, and a program to forecast earthquakes. The forecasts allow users to make informed risk management decisions.

Abstract: A method for processing a set of spectra, particularly NMR spectra, by selecting a principle spectral range, recording a plurality of principle spectra in the principal spectral range, obtaining a reference principal spectrum in the principal spectral range, carrying out, for each one of the principal spectra, a bin-wise division of the principal spectrum by the reference principal spectrum to obtain a corresponding set of spectral quotients; calculating, for at least one of the principal spectra, an associated set of statistical measures derived from the corresponding set of spectral quotients, and carrying out, for at least one of the sets of statistical measures, an outlier detection test.

Abstract: Method and apparatus to predict the onset of earthquakes, one to three days prior to the event. Predictions of latitude, longitude, and time of occurrence of an incipient earthquake, by monitoring and exploiting unique changes in the ionosphere and atmosphere, may be obtained. The methodology, focused on radio-tomography of the ionosphere, includes data receiving, transmission, and analysis stations on the earth's surface; data from satellite transmitters; and mechanisms to extract earthquake-related signatures that are correlated, processed, interpreted, and disseminated as warnings from central analysis centers. Additionally, data from ground-based radars that display unique clutter maps during earthquake pre-cursor activity and data from cellular telephone networks that display signal fading may also be used.

Abstract: A technique is described for interpretation of IPTT tests. In one implementation, the technique may be configured or designed to standardize the complete interpretation procedure of IPTT in a heterogeneous reservoir, using if available, modern wireline logs (such as, for example, nuclear magnetic resonance and imaging), dynamic data from wireline formation testers and/or any other relevant information (such as, for example, geological description, core data and local knowledge) as constraints on the interpretation. Additionally, an iterative method may be used to define formation layering. An advanced regression technology may also be used to obtain optimized horizontal and vertical permeabilities of reservoir layers.

Abstract: A method, mechanism, and system for determining an effective resistance for a network of resistors, irrespective of the number of terminals is provided. An aspect of an approach relates to the reduction of any network of resistors to a single resistance value. Another aspect of an approach relates to the application of a power loss calculation to determine the effective resistance. Yet another aspect of an approach relates to the integration of the method/mechanism with an analog simulator.

Abstract: An embodiment of the present invention is a technique to pattern features. An array of nanowires is placed at a distance to a resist layer. The array forms a plurality of light emitting diodes (LEDs). The distance corresponds to a near-field region of the light emitted by the LEDs with respect to the resist layer. A control circuit controls the LEDs to emit the light to pattern a feature in the resist layer.

Abstract: Method for zero correction of a measuring device, in particular a flowmeter, wherein a number of zero settings are carried out with the device and/or process in different states. In the case of each of these zero settings, a set of device and/or system parameters is recorded together with the measured zero value and stored in an electronic memory, and in normal operation of the measuring device, a stored set of device and/or system parameters that matches the respectively current system and/or device parameters is sought, so that the measured zero value assigned to this set of parameters is used as the current zero value.