Patent application number | Description | Published |
20100299069 | SPATIAL INTERPOLATION OF IRREGULARLY SPACED SEISMIC DATA - A method for spatially interpolating pressure values of seismic data uses known values of pressure and spatial derivatives of pressure at a plurality of irregularly spaced locations along the direction of interpolation. The interpolation preferably uses an interpolation operator calculated by assuming that an interpolated pressure value comprises a linear combination of the known pressure values at locations x | 11-25-2010 |
20100312481 | MOVEOUT CORRECTION OF SEISMIC DATA - A method of processing seismic data including pressure data and pressure gradient data to obtain gradients of moveout corrected pressure data, comprising applying a move-out correction function to the pressure gradient data; and adding a correction term dependent on a moveout corrected time-derivative of the pressure data and a spatial derivative of the moveout correction function. The method may be used prior to any data processing algorithm which uses pressure gradient data in which moveout correction is applied prior to the algorithm, either because the algorithm makes a zero offset assumption or because it is beneficial for the algorithm to operate on moveout corrected data to reduce aliasing. | 12-09-2010 |
20110191032 | INTERPOLATION OF PERIODIC DATA - A method for interpolating data. The method includes receiving data acquired at one or more locations where the data represents subterranean formations in the earth. The method also includes selecting one or more of the locations such that the selected locations are within a vicinity of an interpolation location. Next, the method includes forming a matrix of interpolation coefficients based on a first function having one or more interpolation variables, a bandwidth for an interpolation operator and one or more differences between the selected locations, wherein at least one of the interpolation variables is periodic. The method then includes forming a differences vector based on a second function having the interpolation variables, the bandwidth and one or more differences between the selected locations and the interpolation location. Using the matrix of interpolation coefficients and the differences vector, the method then forms an interpolation operator vector by applying an inverse of the matrix of interpolation coefficients to the differences vector. The method then estimates a data value for the interpolation location using the interpolation operator vector. | 08-04-2011 |
20110317521 | CORRECTING GEOMETRY-RELATED TIME AND AMPLITUDE ERRORS - A method for predicting a plurality of surface multiples for a plurality of target traces in a record of seismic data acquired in a survey area. The method includes selecting a target trace and identifying two or more desired traces for multiple prediction based on the target trace. After identifying the desired traces, the method identifies one or more recorded traces for each desired trace. Each identified recorded trace is described as being substantially close to one of the desired traces. The method then includes correcting the identified recorded traces for one or more geometry-related effects associated with the survey area and convolving the corrected recorded traces to generate a plurality of convolutions. After convolving the corrected recorded traces, the method then stacks the convolutions. | 12-29-2011 |
20120209530 | INTERBED MULTIPLE PREDICTION - A method and apparatus for predicting interbed multiples is described herein. Trace geometries may be generated for one or more desired shot-side traces, one or more desired receiver-side traces, and one or more desired interbed multiple generator traces, for a first target trace. A first set of reflections at the interbed multiple generator layer may be extracted from one or more recorded traces closest to the desired interbed multiple generator traces. A second set of reflections below the interbed multiple generator layer may be extracted from one or more recorded traces closest to the desired shot-side traces. A third set of reflections below the interbed multiple generator layer may be extracted from one or more recorded traces closest to the desired receiver-side traces. The interbed multiples for the first target trace may be estimated based on the first set, the second set, and the third set. | 08-16-2012 |
20130235697 | METHODS AND COMPUTING SYSTEMS FOR PROCESSING DATA - Computing systems and methods for processing collected data are disclosed. In one embodiment, a method for iteratively separating a simultaneous-source dataset is provided, wherein the simultaneous-source dataset is used as an input dataset for a first iteration of simultaneous-source separation. The input dataset includes a plurality of shots that include data corresponding to a plurality of source activations. The method of iteratively separating the input dataset includes generating simulated simultaneous shots based on shots separated in the input dataset; and forming an output dataset based on the separated simultaneous shots and the simultaneous-source dataset, wherein the output dataset is configured for use as the input dataset for the next iteration of separating the simultaneous-source dataset. | 09-12-2013 |
Patent application number | Description | Published |
20080225642 | Interpolation of Irregular Data - Implementations described herein provide methods and devices for interpolating or estimating data from previously acquired data. Furthermore, implementations described herein calculate optimum interpolation operators by maximizing the spatial bandwidth of interpolation operators within a specified acceptable mean square error. According to one implementation, spatial bandwidth may be maximized by selecting a local grid within a global grid having nodes corresponding to desired interpolation locations. According to another implementation, spatial bandwidth may be maximized by specifying maximum wave numbers when calculating interpolation operators. | 09-18-2008 |
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 optimizing the seismic survey for separation of the sensed energy according to the seismic sources. | 01-21-2010 |
20100074052 | INTERBED MULTIPLE PREDICTION - A method and apparatus for predicting interbed multiples is described herein. Trace geometries may be generated for one or more desired shot-side traces, one or more desired receiver-side traces, and one or more desired interbed multiple generator traces, for a first target trace. A first set of reflections at the interbed multiple generator layer may be extracted from one or more recorded traces closest to the desired interbed multiple generator traces. A second set of reflections below the interbed multiple generator layer may be extracted from one or more recorded traces closest to the desired shot-side traces. A third set of reflections below the interbed multiple generator layer may be extracted from one or more recorded traces closest to the desired receiver-side traces. The interbed multiples for the first target trace may be estimated based on the first set, the second set, and the third set. | 03-25-2010 |
20100097885 | REMOVING SEISMIC INTERFERENCE USING SIMULTANEOUS OR NEAR SIMULTANEOUS SOURCE SEPARATION - A technique includes providing seismic data that is indicative of energy that is sensed in response to a first operation of at least one seismic source in a first seismic survey and a second operation of at least one seismic source in a second seismic survey. The technique includes processing the seismic data to determine a timing of the second operation relative to the first operation, and the technique includes based at least in part of the determined timing, processing the seismic data to generate a dataset, which is indicative of the sensed energy that is attributable to the first operation and is not attributable to the second operation. | 04-22-2010 |
20100271904 | SEPARATING SEISMIC SIGNALS PRODUCED BY INTERFERING SEISMIC SOURCES - A technique includes obtaining seismic data acquired by seismic sensors of a composite seismic signal that is produced by the firings of multiple seismic sources. The technique includes modeling the seismic data as being a function of models for the sources and linear operators and defining desired constraints on the models. The technique includes simultaneously determining the models based on the modeling and the desired constraints. The datasets are generated based on the determined models. Each dataset is indicative of a component of the composite seismic signal and is attributable to a different one of the seismic sources. | 10-28-2010 |
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 optimizing the seismic survey for separation of the sensed energy according to the seismic sources. | 06-16-2011 |
Patent application number | Description | Published |
20130066533 | VEHICLE STOPPING DISTANCE IMPROVEMENTS - A method for reducing the braking distance for a vehicle having an anti-lock braking mechanism (ABS) and a hydraulic braking system detects a brake pressure requested by the vehicle's driver (P | 03-14-2013 |
20130073164 | METHOD OF AVOIDING BRAKE DISC SCORING IN A VEHICLE - A method for avoiding reducing scoring of the brake disc or the brake drum of a vehicle driven under rainy conditions calculates a product of three parameters, and activates an automatic braking operation for the vehicle, regularly, whenever the product exceeds the pre-determined threshold level. The first parameter is a rain intensity based parameter, a measure of the current raining intensity. The second parameter is a brake-activation-free driving time parameter, representing the time elapsed since the braking system of the vehicle was activated last. The third parameter is a speed parameter, which represents a current speed of the vehicle. As the automatic braking operation is carried out, the particles of dust, water, snow and de-icing substances, adhered to the brake disc of the vehicle, and causing scoring of the brake disc, are quickly removed, thus, reducing disc scoring. | 03-21-2013 |
20130124060 | HYDRAULIC BRAKING SYSTEM CONTROL IN AUTOMOTIVE VEHICLES - A hydraulic braking system for a vehicle incorporating a vehicle dynamics control system (VDCS) includes an electromechanically actuated brake master cylinder that hydraulic braking system detects a reduction in the brake pressure of the wheel brake device, caused due to intervention of the VDCS in the braking operation, and moves a piston of the brake master cylinder in a direction opposite to an actuating direction. This causes an additional flow of the brake fluid from a reservoir to one or more pressure chambers of the brake master cylinder, thus, avoiding the piston from reaching a stop condition, and hence, avoiding an inadequacy in the volume of the brake fluid available in the pressure chambers of the brake master cylinder. | 05-16-2013 |
20130133988 | METHOD FOR OPERATING A BRAKE SYSTEM OF A VEHICLE - A method for operating a brake system of a vehicle is described. The vehicle includes a service brake having a brake master cylinder and a plurality of wheels each having a respective brake device. Upon attainment of a given measurement value, in particular in the context of a stability control procedure, a brake pressure is built up by means of the brake master cylinder at the brake devices of all wheels. | 05-30-2013 |
20130169033 | METHOD FOR OPERATING A HYDRAULIC BRAKE SYSTEM OF A MOTOR VEHICLE AND A HYDRAULIC BRAKING SYSTEM - A method for operating a hydraulic brake system of a motor vehicle, comprising a pressure generating device used to build up additional brake pressure in a master brake cylinder or in addition to a master brake cylinder and in opposition to further pedal actuation wherein the additional pressure is a function of the pedal actuation travel distance. A method that reduces the limitations of a braking system's physical parameters on the build-up of additional braking pressure. | 07-04-2013 |
20130304313 | METHOD FOR TESTING HYDRAULIC BRAKING SYSTEMS IN VEHICLES - A method for testing a hydraulic braking system. The method includes activating a brake master cylinder of the braking system mechatronically, and measuring a set of measured decision ratios pertaining to the distance travelled by the piston of the brake master cylinder to the corresponding pressure developed in the brake fluid. The measured decision ratios are then compared with a set of reference decision ratios. In a case where the measured decision ratios lie within a predetermined range, it is detected that the braking system is correctly filled with the brake fluid. However, in a case where the measured decision ratios lie outside the predetermined range, it is determined that the braking system has not been correctly filled with the brake fluid and some air is present in the brake fluid flow circuit of the braking system. | 11-14-2013 |
20130332043 | ADAPTING A BRAKING PROCESS - A deceleration of a vehicle is determined based on one or more wheel speeds of the vehicle. A brake pressure of the vehicle is determined. A model of a relationship of the deceleration and the brake pressure is produced. At least one of a vehicle load and a vehicle weight is determined by using the model. The brake pressure is adapted to at least one of the determined vehicle load and the vehicle weight. | 12-12-2013 |
20140058639 | SYSTEM AND METHOD FOR OPERATING A VEHICLE BRAKE SYSTEM - A method for operating a service brake system in a vehicle is described. The method includes the stages of determining whether the vehicle is stationary, and detecting whether the brake pressure exceeds a predetermined value in that stationary state. If the brake pressure value exceeds the predetermined value, as part of final stage, the method includes regulating the brake pressure to a predefined limiting value, where the predefined limiting value is sufficient to maintain the vehicle in that stationary state. | 02-27-2014 |
20140186192 | Method and Device for Controlling a Vacuum Apparatus - Method and device for controlling a vacuum apparatus. A method for controlling a vacuum apparatus that applies vacuum to a vacuum accumulator with a pump of a pneumatically operated servo unit of a motor vehicle. The method comprises the steps of determining the pressure in the vacuum accumulator; determining the ambient pressure; adapting a pump control signal to the ambient pressure; comparing the pressure in the vacuum accumulator with an adapted pump control signal; and outputting a pump actuation signal that is a function of the comparison. | 07-03-2014 |
20140375114 | METHOD FOR OPERATING A HYDRAULIC BRAKE SYSTEM - A method for operating a motor vehicle hydraulic braking system having at least one electric motor-operated braking pressure generator. The output power of the electric motor-operated braking pressure generator is restricted during normal driving/braking situations and the restriction is temporarily deactivated upon identification of a critical driving situation, such as an overstressing of the brake system to include brake fade. | 12-25-2014 |