|
Match
|
Document |
Document Title |
|
|
7472588 |
Petrophysical fluid flow property determination
A method and apparatus for determining petrophysical parameters within a geologic formation pressurizes a geologic sample through a set of predetermined effective pressures, energizes the sample at...
|
|
|
7319332 |
Method for determining of the formation factor for a subterranean deposit from measurements on drilling waste removed therefrom
Method and device for determining the formation factor of underground zones from drill cuttings. The device comprises a cell ( 1 ) associated with a device for measuring the electrical conductivity...
|
|
|
7221165 |
Method and device for measuring the resistivity anisotropy of layered rock samples
A method and device with application to petrophysical measurements on porous rocks for measuring the resistivity anisotropy of rocks exhibiting layerings of different conductivity such as...
|
|
|
6788066 |
Method and apparatus for measuring resistivity and dielectric in a well core in a measurement while drilling tool
A highly accurate, fully compensated, high spatial resolution, wave propagation system for measuring dielectric constant and resistivity of fluids or solids in a cylindrical enclosure and method...
|
|
|
6380745 |
Electrical geophysical apparatus for determining the density of porous materials and establishing geo-electric constants of porous material
The invention includes an apparatus for determining geo-electric data and the density of a porous material. A resistivity-measuring device applies an electrical current through an electrode array...
|
|
|
6229312 |
Method and device for fast measurement of the resistivity index of solid samples such as rocks
Method and device for measuring the resistivity index curve (Ir) of a solid sample such as a geologic sample independently of the capillary pressure curve (Pc). Multi-frequency complex impedance...
|
|
|
6178807 |
Method for laboratory measurement of capillary pressure in reservoir rock
An effective laboratory method for developing complete capillary pressure curves involves directly measuring an oil/water saturation profile within a cylindrical porous rock core plug. The...
|
|
|
6166546 |
Method for determining the relative clay content of well core
A method for determining a relative clay content of at least a portion of a well core taken from a subterranean geologic formation by: determining the relationship of the clay content of the well...
|
|
|
6147497 |
Using electrical impedance tomography to map subsurface hydraulic conductivity
The use of Electrical Impedance Tomography (EIT) to map subsurface hydraulic conductivity. EIT can be used to map hydraulic conductivity in the subsurface where measurements of both amplitude and...
|
|
|
5923171 |
Determining a parameter on a component in a composition
A method of determining a parameter selected from the electrical conductivity and the volume fraction of a component in a composition comprising a plurality of components is provided. The method...
|
|
|
5832409 |
Automated gas permeameter
An automated gas permeameter measures permeabilities of porous samples, such as rocks, ranging from 0.1 milliDarcys to 10 Darcys within 0.5% under dry and humid conditions. The automated gas...
|
|
|
5610524 |
Device for petrophysical measurement and implementation method
The device includes a cell for a sample, delimited lengthwise by two end pieces (7, 8) and laterally by a deformable sheath (17). The end pieces are traversed by channels (14) which place their...
|
|
|
5503001 |
Determination of permeability of porous media and thickness of layered porous media
Process and apparatus for determination of permeability of porous media and thickness of layered porous media by measurement at finite frequency of streaming potential and electro-osmotic induced...
|
|
|
5493226 |
Method and apparatus for measuring properties of core samples including heating and pressurizing the core sample and measuring the dynamic and static capillary pressure of water in the core sample
A method and apparatus for obtaining data for simultaneously measuring relative permeability (k r ), static capillary pressure, dynamic capillary pressure (P c ), and electrical resistivity (R t )...
|
|
|
5341101 |
Method and apparatus utilizing ionizing and microwave radiation for saturation determination of water, oil and a gas in a core sample
A system for determining the relative permeabilities of gas, water and oil in a core sample has a microwave emitter/detector subsystem and an X-ray emitter/detector subsystem. A core holder...
|
|
|
5239267 |
Method for improving the accuracy of dip determination using adjustable high pass filters
The present system is directed to an improved dipmeter system including plural sensors on isolated pads around a sonde. An independent output is formed from each of the sensor pads, and each output...
|
|
|
5209104 |
Method for desaturating a porous rock for electrical resistivity measurements
A porous rock is saturated with a first fluid and electrical resistivity is measured along its length. A second fluid, immiscible with the first fluid, is injected into the porous rock at a first...
|
|
|
5164672 |
Method for measuring electrical resistivity of a core sample of porous rock during water drainage and imbibition
A two-phase fluid, flow having a first fluid and an immiscible second fluid, is passed through a core sample. The core sample is scanned with X-rays to produce a display of fluid distribution...
|
|
|
5105154 |
Apparatus for measuring radial resistivities in cylindrical core samples of porous rock
A cylindrical core sample of a subterranean formation is place into a sleeve under confining pressure. At least one electrode array extends through the sleeve and makes contact with the core...
|
|
|
5095273 |
Method for determining tensor conductivity components of a transversely isotropic core sample of a subterranean formation
A transversely isotropic cylindrical core sample of a subterranean formation is fluid saturated and subjected to a confining pressure. Electrical potential is measured along the core sample and in...
|
|
|
5093623 |
Method for determining electrical anisotrophy from radial resistivities in cylindrical core samples of porous rock
A cylindrical core sample of a subterranean formation is fluid saturated and subjected to a confining pressure. Voltages are measured in a plurality of directions through the core sample which are...
|
|
|
5059907 |
Method for evaluating the water saturation of subterranean formations from dielectric permittivity measurements
Two types of dielectric logging tools are in use: the pad type which operates in the 100 to 1100 MHz frequency range and the mandrel type, which typically operates in the 10 to 100 MHz range....
|
|
|
5010301 |
Method for determining the swelling clay content of cement mixtures by dielectric measurements
A method for determining at wellsites the swelling-clay content of cement mixtures by high-frequency dielectric measurements including: grinding a cement mix sample to a size suitable for testing;...
|
|
|
4996489 |
Laboratory technique for measuring complex dielectric constant of rock core samples
A system for measuring the complex dielectric constant of a core sample is set forth. It incorporates a circular wave guide having a central axial transmitter coil. Equally spaced axial receiver...
|
|
|
4982604 |
Method and system for testing the dynamic interaction of coring fluid with earth material
A material sample representative of a subsurface formation is tested for its dynamic interaction with a coring fluid. The material sample is subjected to a pressurized and agitating coring fluid to...
|
|
|
4979393 |
Process for rapidly determining the solids content in drilling fluids
A method for determining at wellsites the solids content of drilling fluids by high-frequency dielectric measurements including: preparing samples of the drilling fluid, of the drill cuttings from...
|
|
|
4926128 |
Method for utilizing measured resistivities of porous rock under differing fluid saturations to identify fluid distribution equilibrium
Resistivities are measured for a plurality of subsections of a porous rock following a fluid injection that alters the fluid saturation throughout the porous rock. The measured subsection...
|
|
|
4924187 |
Method for measuring electrical anisotrophy of a core sample from a subterranean formation
A core sample from a subterranean formation is shaped to provide a plurality of parallel, planar outer surfaces. Electrical resistivity is measured in each of the azimuthal directions through the...
|
|
|
4907448 |
Apparatus for measuring resistivity of porous rock
Apparatus is provided for measuring resistivities along the length of a core sample of a porous rock under confining pressure and varying fluid saturations. A confining pressure sleeve surrounds...
|
|
|
4907442 |
Method and system for determining fluid saturations within natural or simulated fractures
A method and system for determining fluid saturation within a fracture. The method comprises the steps of establishing a functional relationship between fluid saturation and capacitance for a...
|
|
|
4903207 |
Method for determining reservoir bulk volume of hydrocarbons from reservoir porosity and distance to oil-water contact level
For a formation zone of a well, a method for determining the relationship between bulk volume of oil φ o as a function of total effective formation porosity φ E and height h above the oil water...
|
|
|
4876512 |
Method for rapidly determining the swelling-clay content in shales and shaly sandstone formations by high-frequency dielectric constant measurements
A method for determining at wellsites the swelling-clay content of shales and shaly sandstones earth formations whereby a sample of the formation is washed with a fluid having a water activity...
|
|
|
4786873 |
Method for evaluating water saturation in petroleum reservoirs from dielectric permittivity
A new functional parameter reprsentative of the geometrical distribution of matrix material and the variable geometrical distribution of hydrocarbon and water in pore spaces in a porous earth...
|
|
|
4769606 |
Induced polarization method and apparatus for distinguishing dispersed and laminated clay in earth formations
Logging means and methods are disclosed for distinguishing between dispersed and laminated clay in earth formations. A wireline apparatus is employed consisting of a multifrequency induced...
|
|
|
4752882 |
Method for determining the effective water saturation in a low-resistivity hydrocarbon-bearing rock formation based upon rock matrix conductance
A low-resistivity, hydrocarbon-bearing subsurface sand formation is logged with an electric logging system. Measurements are taken of formation porosity, water resistivity and formation...
|
|
|
4751646 |
Method for determining original saturations in a produced field
For a formation zone of a well, a method for determining the relationship between bulk volume of oil φ o as a function of total effective formation porosity φ E and height h above the oil water...
|
|
|
4734649 |
Apparatus for measuring the resistivity of a sample
A core holder is provided for making petrophysical measurements of core samples from a borehole. The core holder is designed to make resistivity measurements and fluid-flow tests under reproduced...
|
|
|
4686477 |
Multiple frequency electric excitation method and identifying complex lithologies of subsurface formations
A method of identifying complex lithologies of subsurface rock formations includes the excitation of at least a portion of the rock formation with a multi-frequency electric current. The voltage...
|
|
|
4646000 |
Method and apparatus for measuring soil salinity
A method for measuring soil salinity measures the low frequency permittivity of a soil sample at one or more frequencies below 2 megahertz and determines the salinity of the soil sample based on...
|
|
|
4644283 |
In-situ method for determining pore size distribution, capillary pressure and permeability
An in-situ method of determining the pore size distribution, capillary pressure curve, and permeability of a formation using induced polarization logging measurements. The induced polarization (IP)...
|
|
|
4631677 |
Method for determining the placement of perforations in a well casing
A method for determining the productivity of a well site includes extracting a core with sponge coring techniques and measuring the parameters of the core. The parameters measured are porosity,...
|
|
|
4628267 |
Measuring of electrical changes induced by in situ combustion through flow-through electrodes in a laboratory sample of core material
Method and apparatus are provided for obtaining accurate dynamic measurements for passage of phase fronts through a core sample in a test fixture. Flow-through grid structures are provided for...
|
|
|
4626773 |
Method and means for determining rock properties using time-domain dielectric spectroscopy
A method and system for measuring rock electrical properties using time-domain spectroscopy. The rock to be measured is place in direct contact with the substantially flat face of a sample cell. A...
|
|
|
4560002 |
Two dimensional microwave chemical flood testing means and method
A method of two dimensional chemical flood testing includes evacuating a porous medium contained in a test cell. The porous medium in the test cell is irradiated with a beam of microwave energy at...
|
|
|
4546318 |
Method for regulating current flow through core samples
A method and system for regulating current flow through a core sample from a subterranean formation being tested for electrical impedance, including a variable-frequency current source, means for...
|
|
|
4543821 |
Method and apparatus for measuring relative permeability and water saturation of a core
A method of determining the oil and water relative permeabilities and the water saturation of a core of earthen material which includes providing two types of liquids to the core in a manner so...
|
|
|
4490676 |
Microwave means for monitoring fluid in a core of material
A microwave core monitor includes a sample cell which contains a test core of an earth formation. A microwave transmitter irradiates the test core with a beam of electromagnetic energy at a...
|
|
|
4281289 |
Method of determining interwell oil field fluid saturation distribution
A method of determining the oil and brine saturation distribution in an oil field by taking electrical current and potential measurements among a plurality of open-hole wells geometrically...
|
|
|
3982177 |
Soil sample conductivity measurement utilizing a bridge circuit and plural electrode cell
A method of measuring at low frequency the electrical conductivity of a hrogeneous soil sample contained in an electrically insulating soil container or cell having at least two, or a colinear...
|
|
|
3770378 |
METHOD FOR DETECTING GEOPRESSURES
Interstitial waters of geopressured shale sections and the transition zone lying above the geopressured shale zones are measured for total salinity or elemental cationic concentration. Variances in...
|