Patent application number | Description | Published |
20080247270 | Resistivity Measurement Through Metal Casing Using Magnetic Field and Magnetoacoustic Phenomena - Measurements of acoustic velocities are made through a case borehole in the absence and presence of an applied magnetic field. A formation resistivity parameter may be estimated from differences in the acoustic velocities. | 10-09-2008 |
20090058415 | METHOD AND APPARATUS OF USING CROSSED MAGNETIC FIELDS FOR MEASURING CONDUCTIVITY, PERMEABILITY AND POROSITY - When a static magnetic field and a crossed oscillating field are applied, the deformation rate at a boundary between a fluid and a porous medium depends on the amplitudes of the applied magnetic fields (to be exact, on their product), electric conductivity, porosity, and permeability. Knowing two of the three enables determination of the third. 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). | 03-05-2009 |
20090180350 | RESONANCE METHOD OF RADIAL OSCILLATIONS FOR MEASURING PERMEABILITY OF ROCK FORMATIONS - A method for determining permeability of a porous medium of a formation, the method including: placing a logging instrument into a borehole that traverses the porous medium, the borehole filled with a borehole fluid; measuring a pressure, p | 07-16-2009 |
20100172211 | Resistivity Measurement Through Metal Casing Using Magnetic Field and Magnetoacoustic Phenomena - Measurements of acoustic velocities are made through a case borehole in the absence and presence of an applied magnetic field. A formation resistivity parameter may be estimated from differences in the acoustic velocities. | 07-08-2010 |
20100254218 | Method and Apparatus for Estimating Formation Permeability and Electroacoustic Constant of an Electrolyte-Saturated Multi-Layered Rock Taking Into Account Osmosis - An acoustic source on a logging tool is used to generate acoustic waves in a borehole. Acoustic detectors on the logging tool measure the generated acoustic waves. Electrodes on the logging tool are used to measure the potential resulting from the generated acoustic wave. The output of the hydrophones and the electrodes corresponding to Stoneley wave components of the acoustic wave are processed to provide an estimate of formation permeability, acoustoelectric constant, and a velocity of a propagating second compressional wave in the formation. | 10-07-2010 |
20110261647 | Resistivity Measurement Through Metal Casing Using Magnetic Field and Magnetoacoustic Phenomena - Measurements of acoustic velocities are made through a case borehole in the absence and presence of an applied magnetic field. A formation resistivity parameter may be estimated from differences in the acoustic velocities. | 10-27-2011 |
20120224455 | RESONANCE METHOD FOR MEASURING THE ELECTROACOUSTIC CONSTANT AND PERMEABILITY OF ROCK FORMATIONS - Disclosed is a method for estimating a property of an earth formation penetrated by a borehole. The method includes: transmitting acoustic waves into the formation from an acoustic source disposed in the borehole and away from a wall of the borehole; generating radial acoustic eigenwaves within a space between the wall of the borehole and the acoustic source using the transmitted acoustic waves; receiving an acoustic signal with an acoustic receiver disposed at the wall of the borehole; sensing an electric field signal with an electric field sensor disposed at the wall of the borehole; and estimating the property using the received acoustic signal and the sensed electric field signal. | 09-06-2012 |
20130070561 | Measurement of Permeability in Borehole in the Presence of Mudcake - The present disclosure relates to methods and apparatuses for evaluating a porous earth formation. The method may include: generating an acoustic wave in a borehole fluid; measuring an attenuation of the acoustic wave; and estimating a permeability of an earth formation acoustically coupled to the borehole fluid using the estimated attenuation and a theoretical attenuation. The method may also include estimating a theoretical attenuation for the borehole fluid using acoustic properties of the borehole fluid. The apparatus for performing the method may include: an acoustic source, an acoustic sensor, and a processor configured to estimate the attenuation of an acoustic wave generated by the acoustic source. | 03-21-2013 |
20130073208 | Method of Measuring Parameters of a Porous Medium Using Nanoparticle Injection - The present disclosure relates to methods and apparatuses for evaluating a porous earth formation. The method may include estimating at least one parameter of interest of the earth formation using a displacement velocity of nanoparticles injected into the porous earth formation and exposed to an alternating magnetic field. The method may include using at least one processor to estimate the value of the at least one parameter. The apparatus may include an alternating magnetic field source, nanoparticles responsive to a magnetic field, and a sensor configured to measure the motion of the nanoparticles. | 03-21-2013 |
20140019049 | Finding Oil Viscosity and SurfaceTension By Means of Dielectric Spectroscopy - The present disclosure relates to methods and apparatuses for evaluating an earth formation using complex dielectric permittivity. The method may include estimating at least one property of the earth formation using a real part and an imaginary part of complex permittivity at a plurality of frequencies. The at least one property may include one or more of: oil viscosity and surface tension of a water-oil system. The method may include performing dielectric permittivity estimates using an electromagnetic tool in a borehole. The apparatus may include the electromagnetic tool and at least one processor configured to store information obtained by the electromagnetic tool in a memory. The at least one processor may also be configured to estimate at least one property of the earth formation. | 01-16-2014 |
20140202687 | DETERMINING FRACTURE LENGTH VIA RESONANCE - A system and method to determine a length of a fracture induced from a borehole are described. The method includes isolating a portion of the borehole, the portion of the borehole including an end of the fracture at the borehole wall, increasing fluid pressure in the portion of the borehole, deploying a low-frequency source in the portion of the borehole, and varying a frequency of the low-frequency source to generate resonance oscillations at a resonance frequency in the fracture. The method also includes determining the length of the fracture based on the resonance frequency. | 07-24-2014 |
20140207382 | Finding Oil Content of the Formation Using Dielectric Spectroscopy - The present disclosure relates to methods and apparatuses for evaluating fluid saturation in an earth formation using complex dielectric permittivity. The method may include estimating fluid saturation using an estimated rate of change at a frequency of an imaginary part of permittivity relative to a real part of permittivity. The method may include performing dielectric permittivity estimates using an electromagnetic tool in a borehole. The apparatus may include the electromagnetic tool and at least one processor configured to store information obtained by the electromagnetic tool in a memory. The at least one processor may also be configured to estimate the fluid saturation. | 07-24-2014 |
Patent application number | Description | Published |
20110050234 | Resonance Method for Measuring Water-Oil Ratio, Conductivity, Porosity, Permeability and Electrokinetic Constant in Porous Formations - A shear wave is generated at a borehole wall. A static magnetic field is applied with a radial direction and an oscillating magnetic field is applied tangential to the borehole wall. The frequency of the oscillating field is varied until a resonance condition occurs. Motion of the formation under resonance provides an indication of a resistivity property of the earth formation. | 03-03-2011 |
20120041680 | Resonance Method of Finding Permeability of Rocks From Parameters of Radial Waves - Radial waves are generated in a borehole in a saturated porous earth formation. Measurements are made of the velocity of motion of the formation and the fluid in the formation. The difference in the velocities is indicative of formation permeability. | 02-16-2012 |
20120095688 | Radial Waves In A Borehole And Stoneley Waves For Measuring Formation Permeability And Electroacoustic Constant - A Stoneley wave is generated in a borehole in a saturated porous earth formation. Measurements are made of the velocity of motion of the formation and the fluid in the formation. The difference in the velocities is indicative of formation permeability. An additional measurement of the electric field at the borehole wall enables determination of the electroacoustic constant. | 04-19-2012 |
20150015264 | FINDING POROSITY AND OIL FRACTION BY MEANS OF DIELECTRIC SPECTROSCOPY - Methods, systems, devices and products for evaluating an earth formation. Methods include estimating at least one property of the earth formation using at least one polarization parameter estimated using a real part and an imaginary part of a permittivity of the earth formation at a plurality of frequencies, where the real parts and the imaginary parts are based on measurements obtained using an electromagnetic tool in a borehole penetrating the earth formation. | 01-15-2015 |