| Patent application number | Description | Published |
|---|
| 20090056411 | CALIBRATING AN ACCELEROMETER - To calibrate an accelerometer, a seismic cable that carries the accelerometer is rotated. Data measured by the accelerometer as the seismic cable is rotated is received, and at least one calibration parameter according to the received data is computed. The at least one calibration parameter is for use in calibrating the accelerometer. | 03-05-2009 |
| 20090092003 | CONTROLLING A SEISMIC SURVEY TO REDUCE THE EFFECTS OF VIBRATION NOISE - A technique includes towing a particle motion sensor in connection with a seismic survey and controlling the survey to cause a notch in a frequency response of the particle motion sensor to substantially coincide with a frequency band at which aliased vibration noise appears in a seismic signal acquisition space of the particle motion sensor. | 04-09-2009 |
| 20090092005 | CONTROLLING SEISMIC SOURCE ELEMENTS BASED ON DETERMINING A THREE-DIMENSIONAL GEOMETRY OF THE SEISMIC SOURCE ELEMENTS - To control a seismic source having plural seismic source elements, a three-dimensional geometric shape of the plural seismic source elements is determined. Timings of activation of the plural seismic source elements is adjusted according to the determined three-dimensional geometric shape. | 04-09-2009 |
| 20090092006 | SEISMIC STREAMER PLATFORM - A technique includes designing a streamer, which includes a cable and seismic sensors based at least in part on a relationship between vibration noise and a bending stiffness of the cable. | 04-09-2009 |
| 20090290447 | Measuring Electromagnetic Source Geometry - An electromagnetic source for electromagnetic survey of a subsea formation includes a towfish configured to be towed by a surface vessel; a plurality of electrodes attached to the towfish; and an acoustic ranging system having acoustic components individually attached to each of the towfish and the plurality of electrodes, wherein the acoustic ranging system is configured to determine a geometry of the plurality of electrodes. | 11-26-2009 |
| 20090296521 | NOISE REDUCTION IN PARTICLE MOTION SENSING SEISMIC STREAMER - An apparatus includes particle motion sensors and a streamer that contains the particle motion sensors. The streamer is to be towed in connection with a seismic survey, and the towing of the streamer produces a turbulent flow. The streamer includes an inner cable that contains the particle motion sensors and a fluid containing layer to surround the inner cable to reduce noise otherwise sensed by the particle motion sensors due to the turbulent flow. | 12-03-2009 |
| 20090323467 | SYSTEM AND TECHNIQUE TO OBTAIN STREAMER DEPTH AND SHAPE AND APPLICATIONS THEREOF - A technique includes obtaining first measurements acquired by sensors of a towed seismic streamer, which are indicative of an inclination of the streamer. Based at least in part on the measurements, a shape of the streamer while in tow is determined. | 12-31-2009 |
| 20100039888 | ESTIMATING AND CORRECTING PERTURBATIONS ON SEISMIC PARTICLE MOTION SENSORS EMPLOYING SEISMIC SOURCE SIGNALS - A computer-implemented method includes accessing a set of multicomponent marine noise data exhibiting a plurality of polarization vectors at each of a plurality of co-located pressure and particle motion data points on a marine seismic survey apparatus; and determining a set of perturbation noise data for the marine seismic survey apparatus from the polarization vectors. Computer readable program storage media are encoded with instructions that, when executed by a processor, perfume the computer-implemented method. One computing apparatus is programmed to perform the computer-implemented method. | 02-18-2010 |
| 20100103770 | Rotational Motion Compensated Seabed Seismic Sensors and Methods of use in Seabed Seismic Data Acquisition - Apparatus and methods for acquiring seismic data using a seabed seismic data cable positioned on a seabed are described, including correcting for the effect of one or more sensor non-linear motions, which improves accuracy of seismic data. One or multiple non-linear movements of the sensor may be corrected for. It is emphasized that this abstract is provided to comply with the rules requiring an abstract, which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b). | 04-29-2010 |
| 20100172208 | SYSTEM AND TECHNIQUE FOR LOCAL IN-SEA PROCESSING OF PARTICLE MOTION DATA - A system includes a seismic streamer, which includes particle motion sensors and processors. Each processor is associated with a different one of the particle motion sensors and is adapted to process data acquired by the associated particle motion sensor to compensate the data for a characteristic of the sensor. | 07-08-2010 |
| 20100195438 | DERIVING TILT-CORRECTED SEISMIC DATA IN A MULTI-AXIS SEISMIC SENSOR MODULE - A seismic sensor module includes sensing elements arranged in a plurality of axes to detect seismic signals in a plurality of respective directions, and a processor to receive data from the sensing elements and to determine inclinations of the axes with respect to a particular orientation. The determined inclinations are used to combine the data received from the sensing elements to derive tilt-corrected seismic data for the particular orientation. | 08-05-2010 |
| 20100202249 | PARTICLE MOTION SENSOR-BASED STREAMER POSITIONING SYSTEM - A technique includes disposing a particle motion sensor on a spread of at least one streamer and using the particle motion sensor to acquire a measurement of a signal, which is transmitted from an acoustic transmitter. The technique includes determining a heading of the particle motion sensor based at least in part on the measurement. | 08-12-2010 |
| 20100202251 | USING A ROTATION SENSOR MEASUREMENT TO ATTENUATE NOISE ACQUIRED BY A STREAMER-DISPOSED SENSOR - A technique includes receiving data indicative of a first measurement acquired by a rotation sensor on a seismic streamer and based on the first measurement, estimating a torque noise present in a measurement acquired by a second sensor on the streamer. The technique includes attenuating the torque noise based on the estimate. | 08-12-2010 |
| 20110211423 | Gravity Measurements Using Seismic Streamers - A technique facilitates collection and use of data on subterranean formations. The technique comprises obtaining gravity measurements through the use of seismic streamers. At least one streamer is provided such that each streamer has multiple sensors, e.g. accelerometers. The at least one streamer is towed with a tow vessel, and gravity data are accumulated via the multiple sensors during towing. | 09-01-2011 |
| 20110305108 | DEGHOSTING USING MEASUREMENT DATA FROM SEISMIC SENSORS - Measurement data is received from first and second seismic sensors, where the first and second seismic sensors are oriented in opposite directions. Each of the first and second seismic sensors has a sensing element responsive to pressure and particle motion. The signals can be combined to remove the particle motion component of the measurement data and obtain pressure-only data. Alternatively, the signals can be combined to deghost the received measurement data. | 12-15-2011 |
| 20110317516 | SEISMIC STREAMER PLATFORM - A technique includes designing a streamer, which includes a cable and seismic sensors based at least in part on a relationship between vibration noise and a bending stiffness of the cable. | 12-29-2011 |
| 20120002504 | GRAVITY MEASUREMENTS IN MARINE, LAND AND/OR SEABED SEISMIC APPLICATIONS - A technique facilitates collection and use of data on subterranean formations. The technique comprises creating a distributed sensor network having multiple sensors arranged in a desired pattern. The distributed sensor network is employed to collect seismic data from the multiple sensors. Additionally, the distributed network and sensors are designed to collect gravity data from the multiple sensors. The sensors may be arranged in a variety of environments, including land-based environments and seabed environments. | 01-05-2012 |
| 20120069706 | Land Seismic Cable and Method - A seismic cable for use in land applications is described. The cable includes seismic sensors for measuring seismic signals reflected from subterranean or subsea formations. The cable may be deployed in trenches dug in the survey region to provide adequate sensor coupling to ground. Sensor units may be inline with the cable and may further be disposed in slim casings, thus facilitating handling and deployment. | 03-22-2012 |
| 20120147700 | Determining Streamer Depth and Sea Surface Profile - A technique includes receiving data indicative of acoustic measurements acquired by receivers disposed on a seismic receiver spread including at least one streamer. The technique includes processing the data in a machine to determine a depth and/or shaped of the spread. | 06-14-2012 |
| 20130021872 | SEISMIC EXPLORATION NOISE REDUCTION DEVICE - A marine seismic exploration device includes a vessel; a sensor device on the vessel that senses movement of the vessel; a connection device that comprises an electric motor; a controller that communicates with the sensor device and the motor; and a seismic sensor connected with the connection device. The connection device has at least a first position where the connection device extends a first length and a second position where the connection device extends a second length, wherein the second length is longer than the first length. The controller is programmed to compensate for the movement of the vessel detected by the sensor by moving the connection device between positions to control the length that the connection device extends. | 01-24-2013 |
| 20130028050 | DETERMINING AN ORIENTATION ANGLE OF A SURVEY SENSOR - Measurement data acquired by at least one sensor in a cable structure towed through a body of water is received. A torsional vibration noise component in the measurement data is estimated. The torsional vibration noise component is used to estimate a rotation angle of the at least one survey sensor with respect to a reference coordinate system of the cable structure. | 01-31-2013 |
| 20130107664 | PROCESSING MULTI-COMPONENT SEISMIC DATA | 05-02-2013 |
| 20130121108 | ROTATIONAL MOTION COMPENSATED SEISMIC SENSORS AND METHODS OF USE IN SEISMIC DATA ACQUISITION - Apparatus and methods for acquiring seismic data using a seabed seismic data cable positioned on a seabed are described, including correcting for the effect of one or more sensor non-linear motions, which improves accuracy of seismic data. One or multiple non-linear movements of the sensor may be corrected for. It is emphasized that this abstract is provided to comply with the rules requiring an abstract, which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. | 05-16-2013 |
| 20130315036 | SENSOR ASSEMBLY - A multiple axis sensor assembly includes an enclosure and encapsulated microelectromechanical system (MEMS) sensors. The encapsulated sensors are disposed inside the enclosure and are mounted in different orientations, which correspond to different axes of the sensor assembly. A controller of the sensor assembly is disposed in the enclosure and electrically coupled to the MEMS sensors. | 11-28-2013 |
| 20130343157 | Neutrally-Buoyant Borehole Investigation Tools and Methods - The disclosure provides neutrally-buoyant tools for seismic data collection. The tools may range from several hundred meters to several kilometers in length and have integrated sensors which move along with the borehole fluid in response to a passing seismic wave. The disclosure also provides methods of deploying neutrally-buoyant tools, which includes using a tractor, adding a weight or both to the tool in order to overcome the difficulty of lowering a neutrally buoyant tool into a borehole, and optionally occasionally clamping the tool to the borehole to alleviate tension in the tool. This disclosure also provides methods of acquiring seismic data, which involves positioning a neutrally-buoyant tool in a borehole such that the tool is able to move relatively freely along with the borehole fluid in response to a seismic wave passing through the fluid, firing a seismic source, and using the sensors to collect seismic data generated thereby. | 12-26-2013 |
| 20130343158 | Borehole Seismic Acquisition Tools, Systems and Methods - A tool is described for seismic data collection which may have sensors mounted along its entire length to sample both geophysical signal and noise including at least one of acoustic noise, system noise, and noise resulting from the interaction between the two. Systems and methods for acquiring borehole seismic data are also described. In contrast to conventional systems which attempt to avoid introducing noise into the collected data stream, the present systems include a sufficient type, number, and spacing of sensors to intentionally sample at least one source of noise. The methods include operating a borehole seismic acquisition system to sample both a target signal and at least one source of noise and using a processor with machine-readable instructions for separating the noise from the signal. | 12-26-2013 |
| 20140219053 | COMPUTING A GRADIENT BASED ON DIFFERENCES OF PLURAL PAIRS OF PARTICLE MOTION SENSORS - A seismic sensor device includes an elongated housing for placement at least partially into an earth surface. A plurality of particle motion sensors are contained in the elongated housing to measure translational data in a first direction, where plural pairs of the particle motion sensors are spaced apart along a second, different direction along a longitudinal axis of the elongated housing. A communication interface communicates the measured translational data to a computer system configured to compute a gradient based on respective differences of the measured translational data of the corresponding plural pairs of the particle motion sensors, and compute one or more of rotation data and divergence data using the gradient. | 08-07-2014 |
| 20140219055 | COMPUTING ROTATION DATA USING A GRADIENT OF TRANSLATIONAL DATA - Translational data in a first direction is measured by particle motion sensors contained in an elongated housing of a sensor device provided at an earth surface. The particle motion sensors are spaced apart along a second, different direction along a longitudinal axis of the elongated housing. Rotation data around a third direction is computed based at least in part on computing a gradient of the translational data with respect to the second direction. | 08-07-2014 |
| 20140269173 | METHODS AND SYSTEMS FOR MARINE SURVEY ACQUISITION - A marine survey acquisition system. The system may include a vessel for towing a marine survey spread. The marine survey spread may include streamers, marine vibrators and a cable. The cable may be coupled to a respective streamer from among the streamers and one of the marine vibrators. The cable may power the respective streamer and the one of the marine vibrators. The one of the marine vibrators may emit energy at a high frequency range. | 09-18-2014 |
| 20140286127 | PROCESSING SEISMIC DATA TO ATTENUATE VIBRATION NOISE - A technique includes receiving first data acquired by at least a particle motion gradient sensor or a rotation sensor of a streamer that is subject to vibration due to towing of the streamer; and receiving second data acquired by at least one particle motion sensor of the streamer and being indicative of particle motion and vibration noise. The technique includes processing the second data in a processor-based machine to, based at least in part on the first data, attenuate the vibration noise indicated by the second data to generate third data indicative of the particle motion. | 09-25-2014 |
