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WO/2014/106811A2 |
A cold atom gravity gradiometer system includes a laser source that generates a laser beam that propagates along a propagation direction. The system further includes a reflector that reflects a portion of the laser beam and transmits ano...
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WO/2014/099865A1 |
Characterizing a parameter of interest relating to a formation intersected by a borehole. Methods may include estimating the parameter using at least one gravity measurement adjusted to account for a gravity field gradient associated wit...
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WO/2014/055071A1 |
In accordance with aspects of the present disclosure, techniques for monitoring subterranean sequestered CO2 are disclosed. Tools for gathering relevant data are disclosed, and techniques for interpreting the resultant data also disclose...
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WO/2014/047682A1 |
The present disclosure provides a method of processing gravity gradient data indicative of an output generated by an airborne gravity gradiometer that is moving along a flight path over a terrain. The method comprises the step of providi...
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WO/2014/040474A1 |
A low-temperature superconducting device for measuring gravity, comprising a low-temperature container (1), a refrigerating machine (2), a rotor chamber (4), a superconducting rotor (5), an upper levitation coil (6), a lower levitation c...
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WO/2014/018324A1 |
A gravity gradient is measured interferometrically from two light beams which each reflect from both of two freefalling test masses. The light beams project in beam arms which remain equal in length as the two test masses freefall except...
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WO/2014/018326A1 |
A test mass used for light beam interferometric gravity characteristic measurement has a center of mass located equidistant and colinear with optical center points of two oppositely reflecting retroreflectors. Rotation of the test mass a...
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WO/2014/007848A1 |
A gravity gradiometer having at least three differential accelerometers with a low response to linear accelerations and at least six angular accelerometers that give it the capability of measuring angular rates by integrating the angular...
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WO/2013/144503A1 |
An atom interferometer with differential inertial measurement comprises an atom source system (100) to supply several sets of atoms (11, 12) intended for acceleration measurements which are made simultaneously at different respective loc...
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WO/2013/112515A1 |
An apparatus and method for estimating reservoir connectivity using gravity estimates at a fluid contact for each of two or more boreholes. The method may include identifying fluid contacts in the boreholes. The method may include additi...
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WO/2013/103455A2 |
Downhole gravity measurements are used to monitor the volumetric sweep of CO2 and estimate the fingering phenomenon if any. The gravity measurements have been found to be effective due to the high density contrast between CO2 and brine o...
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WO/2013/096997A1 |
The invention relates to short-term earthquake prediction. The essence of the invention is that anomalous variations in the values of the gravitational constant prior to strong earthquakes are recorded in four directions at an angle of 4...
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WO/2013/098225A1 |
The present invention relates to the mechanical field, in particular to an angle calculation device, comprising an angle calculation component and an accelerometer which can be installed on a rotating part of a gantry, wherein the accele...
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WO/2013/096362A1 |
Systems and methods are provided for determining a property, e.g., density, of a geological formation based on Einstein's theory of gravitation. A gravitational potential difference is determined between two positions of the geological f...
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WO/2013/096387A1 |
Systems and methods are provided for determining a property, e.g., density, of a geological formation based on Einstein's theory of gravitation. A gravitational potential difference is determined between two positions of the geological f...
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WO/2013/090399A1 |
In one aspect, an apparatus for use in a wellbore is provided that in one embodiment includes a sensor having a plurality of spaced conductive contact elements, a sensing member that moves by gravity and contacts at least two contact ele...
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WO/2013/088064A1 |
The invention relates to a measurement by means of atom interferometry, using a Raman source that is created by modulating a monochromatic laser source. By conveniently selecting positions (P0, P1, P2) in which interactions between atoms...
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WO/2013/077771A1 |
The group of inventions relates to the field of physics, in particular gravimetry, and can be used in the performance of geophysical surveys, the results of which are of importance to such technical fields as astronomy, geodesy and geolo...
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WO/2013/036156A1 |
A method of estimating a geology of an earth formation includes: receiving gravity measurements from each of a plurality of gravity sensors ns j arrayed along a length of a borehole in an earth formation, each of the sensors ns j generat...
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WO/2012/160429A1 |
Device (1 ) for the measurement of deformation of the ground under the Earth surface including: an elongated element (8, 32, 42) which is flexible and it is suitable to be inserted in a hole (7) drilled inside the ground; a plurality of ...
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WO/2012/152858A1 |
Seafloor movements are monitored by measuring the ambient seawater pressure at a plurality of locations adjacent to the seafloor using asynchronous pressure signals generated by a plurality of pressure sensors mounted at different locati...
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WO/2012/144931A2 |
A method for the short-term prediction of earthquakes is proposed, said method being based on the disclosure by the author of the periodic expansion and contraction of the Earth from an oscillation amplitude of the Earth's radius of ΔR=...
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WO/2012/145525A2 |
The present disclosure relates to methods and apparatuses for acquiring multi-component gravity information for an earth formation. More particularly, the present disclosure relates to estimating the movement of fluid in an earth formati...
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WO/2012/135020A2 |
A method of estimating a parameter of an anomaly in an earth formation includes: disposing a measurement device at at least one measurement location, the measurement device including a frequency standard; estimating a frequency shift of ...
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WO/2012/127210A2 |
We describe improved techniques for airborne gravity gradiometer surveys. In particular we describe a method and system for performing a gravity gradiometer survey of a surveyed region of terrain, the method comprising: providing an airc...
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WO/2012/122503A2 |
A method for determining spatial distribution of a property within a volume of subsurface formations includes generating an initial model of spatial distribution of a property of the formations using available data related to the propert...
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WO/2012/109738A1 |
Systems and methods for determining a bias-corrected value of at least one component of a gravity gradient tensor using a gravity gradiometer and a measurement bias of the gravity gradiometer wherein the measurement bias varies with time...
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WO/2012/090128A2 |
The present invention relates to a piloting method of a laser system of an absolute gravimetric measurement device by atomic interferometry particularly suitable for on-site applications and advantageously used in the geophysical field, ...
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WO/2012/090134A2 |
A device comprising a laser system (13) for generating a plurality of laser bands, such laser bands being each conformant at a frequency equal to an energetic transition between a hyperfine level (Fl, F2) of a fundamental state (52Si/2) ...
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WO/2012/090121A2 |
Absolute gravimetric measurement device (10) of the type comprising, arranged in downward succession along the vertical direction, a laser system (13), a supporting surface (16) of said laser system (13), an ultra-vacuum system (14), a r...
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WO/2012/027848A1 |
A method for modeling a subsurface anomalous density zone including the steps of forming a density model, computing a response to the density model, inverting the response to arrive at a geometric model of the anomalous density zone, and...
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WO/2012/021938A1 |
The present disclosure provides a method of processing and analysing gravity gradient data, the method comprises the step of providing the gravity gradient data for a survey area. The survey area has a ground surface that is profiled by ...
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WO/2012/001388A2 |
A method of processing measured potential field data from an airborne or marine potential field survey to determine a set of field mapping parameters for mapping a field, the method comprising: inputting said measured potential field dat...
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WO/2011/120087A1 |
The present disclosure provides a method of detecting a change in gravity gradient using a gravity gradiometer. The gravity gradiometer comprises a detector for detecting the change in gravity gradient. The gravity gradiometer further co...
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WO/2011/098821A2 |
A system for measuring geophysical data from a potential field survey of a surveyed region of the earth to provide a representation of the geology of said surveyed region, the system comprising: a gradiometer for measuring gravity gradie...
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WO/2011/097169A2 |
The present disclosure relates to methods and apparatuses for calibrating a sensor, particularly a gravimeter, which involves positioning the sensor in at least three different orientations and calibrating the sensor using a linear model...
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WO/2011/097110A1 |
A system and method for use in a downhole tool having distance measurement, feature detection, and primary measurement devices positioned therein are provided. In one example, the method includes recording a first plurality of features a...
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WO/2011/086020A1 |
The invention relates to an interferometric free-fall gravity gradiometer, comprising at least one source of coherent light L and a first retroreflector TM1 able to fall freely in the gradiometer as well as a second retroreflector TM3 ab...
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WO/2011/032080A2 |
A technique facilitates the measurements of forces, such as forces that result from gravity and acceleration. The system and methodology utilize a plurality of electrodes that cooperate with a movable electrode. By applying appropriate s...
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WO/2011/022702A1 |
A gravimeter is disclosed that comprises a base, a reference device coupled to the base and configured to move along a first axis, a falling device configured to free fall from a first position to a second position on a second axis that ...
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WO/2011/004181A2 |
A method of conducting a potential field survey of a survey surface, the method comprising following a set of paths along an observation surface at an observation height above the surface survey and measuring potential field data at poin...
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WO/2011/001154A2 |
Apparatus for the measurement of quasi-static gravity gradients comprising: a flexible ribbon held under tension at both longitudinal ends; sensing means arranged to detect the transverse displacement of the ribbon from an undisturbed po...
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WO/2010/142765A2 |
The invention relates to a method for measuring a gravitational field comprising at least two steps. A first step (101) uses at least one measurement antenna to define a table of measurements representing the gravitational field generate...
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WO/2010/130967A1 |
A method of processing geophysical data including at least measured potential field data from a potential field survey of a surveyed region of the earth to provide a representation of the geology of said surveyed region, the method compr...
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WO/2010/132432A2 |
An apparatus for estimating a property of an earth formation includes: a plurality of sensors configured to estimate at least one property, each of the plurality of sensors located at a known position relative to one another; and a proce...
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WO/2010/132111A2 |
An instrument for determining the second and/or third-order components of the gravity tensor includes a group of six accelerometers arranged at an equal radius from a spin axis and positioned at 60 degree intervals about the spin axis wi...
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WO/2010/080254A1 |
A technique facilitates the collection of improved gravitational acceleration measurements and enables use of those measurements in analyzing environmental characteristics of a subterranean region. In one embodiment, a downhole tool is c...
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WO/2010/045738A1 |
A quadrupole responder for an OQR-type gravity gradiometer comprises a housing, and a mass quadrupole positioned within the housing. The mass quadrupole has a pair of sides, and also has a center of mass between the sides. At least a pai...
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WO/2010/048508A1 |
A quadrupole responder for an OQR-type gravity gradiometer comprises a housing, and a mass quadrupole positioned within the housing. The mass quadrupole has a pair of sides, and also has a center of mass between the sides. The quadruple ...
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WO/2010/034073A1 |
The present disclosure provides a gravity gradiometer which comprises a component comprising a detector for generating a signal in response to a change in gravity gradient experienced by the gravity gradiometer. The gravity gradiometer a...
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