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Matches 51 - 100 out of 499

Document Document Title
WO/2016/019020A1
An apparatus for estimating gravitational properties includes an optical source, a first interferometer including a fixed reference reflector and a first reflector coupled to a first moveable mass, a second interferometer including the f...  
WO/2015/199683A1
A gravitational logging method includes obtaining gravitational field measurements from a permanent array of downhole or subsea sensor units. The method also includes inverting the gravitational field measurements as a function of positi...  
WO/2015/199684A1
A gravitational logging method includes optically obtaining gravitational field measurements from one or more downhole or subsea sensor units. The method also includes inverting the gravitational field measurements as a function of posit...  
WO/2015/104633A3
Systems and methods for two dimensional gravity modeling with variable densities are disclosed. The methods may include a method of modeling the density of a subsurface formation. The methods may include generating a plurality of cells i...  
WO/2015/152521A1
Disclosed is a method for measuring density change of an underground material. In order to measure density change of an underground material, a borehole is formed on the top portion of the underground material which is subjected to measu...  
WO/2015/143546A1
An absolute vector gravimeter and method of use is provided. The absolute vector gravimeter includes one or more single axis accelerometers, each capable of pointing in at least two directions and calculating an estimated gravity compone...  
WO/2015/127237A1
A method for rebalancing a group of accelerometers in a gravity gradiometer instrument (GGI) includes the steps of defining and implementing a number of group- wise actuation constrainment modes based on a design of the gravity gradiomet...  
WO/2015/104633A2
Systems and methods for to two dimensional gravity modeling with variable densities are disclosed. The methods may include a method of modeling the density of a subsurface formation is disclosed. The methods may include generating a plur...  
WO/2015/103608A1
A non-contacting spherical air bearing-based stable platform for use by a gravity gradiometer instrument (GGI) is provided by attaching a spherical ball-shaped bearing to a rotational stage of the GGI and integrating a concave spherical ...  
WO/2013/096391A3
Systems and methods are provided for determining a property, e.g., density, of a geological formation based on Einstein's theory of gravitation. A tandem-structured gravimeter uses two gamma radiations emitted to two directions to determ...  
WO/2015/069254A1
A rotational gravity gradiometer includes a first member, a second member, a drive member and a motor. The first member is disposed above the second member orthogonal to and centered with respect to the second member. The first member in...  
WO/2015/065651A1
A hydrocarbon exploration method for determining subsurface properties from geophysical survey data. Rock physics trends are identified and for each trend a rock physics model is determined that relates the subsurface property to geophys...  
WO/2015/050734A1
A capsule comprising two non-directly contacting halves enables otherwise coupling loads between experiment and gauging to be re-routed through the outer-most portable body (e.g. a logging sonde housing) having substantial inertia, thus ...  
WO/2015/042754A1
A method for parsing and calculating performance of satellite gravity field measurement by low-to-low satellite-to-satellite tracking, comprising: acquiring a parameter of a gravity satellite system of low-to-low satellite-to-satellite t...  
WO/2015/042693A1
Apparatus and method for controlling a frequency of laser light based on a reference medium are disclosed. An exemplary method comprises controlling the frequency based on a comparison of a measured spectrum of a physical property associ...  
WO/2014/106811A3
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...  
WO/2014/163922A3
A gravity gradient is measured interferometrically from two polarized light beams having mutually different polarization planes which reflect from opposite surfaces of two freefalling test masses. The two polarized light beams project al...  
WO/2014/209152A1
Methods, systems, and devices for characterizing a water-flooded zone in an earth formation resulting from injection of water to the formation through an injector well borehole intersecting the formation. The method includes estimatin...  
WO/2014/176699A1
A bipartite sensor array comprising two portions capable of assembly into a single sensory system. A first portion comprises rigid bodies connected by elongate flexures and fitted with gravimetric tilt sensors. The elongate flexures are ...  
WO/2014/169318A1
A temperature control device for use with airborne measurement in geological and geophysical surveys. The device includes a thermally insulated housing for mounting into an airborne vehicle and within which electronic survey equipment is...  
WO/2014/163922A2
A gravity gradient is measured interferometrically from two polarized light beams having mutually different polarization planes which reflect from opposite surfaces of two freefalling test masses. The two polarized light beams project al...  
WO/2014/163937A1
Incident differently-polarized light beams are separately directed and combined by one or two corner cube structures, each having one or two walls formed as a beam splitter. One incident light beam is passed, while the other incident lig...  
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...  
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...  
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...  
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...  
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...  
WO/2013/103455A3
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
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...  
WO/2012/127210A3
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...  
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...  
WO/2012/145525A3
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...  
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...  
WO/2012/135020A3
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 ...  
WO/2012/122503A3
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...  
WO/2012/144931A3
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=...  
WO/2012/090134A3
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) ...  
WO/2012/090121A3
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...  
WO/2012/090128A3
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, ...  

Matches 51 - 100 out of 499