Class 73/152.07 - By a core sample analysis

Subclass of Class 73 - Measuring and testing
Definition: Subject matter including a sample in the form of an undisturbed
No. of patents: 34
Last issue date: 01/18/2011

Number	Title	Issue Date
7870782	Method and apparatus for determining the properties of drilling fluids Methods and apparatus to measure flow of a drilling fluid composition include a test housing including a test matrix located between an inlet and an outlet, a test valve connected between the inlet of the test housing and a fluid reservoir, and a pressure assembly c...	01/18/2011
7333892	Method of determining multiphase flow parameters of a porous medium taking account of the local heterogeneity A method with application for evaluation or production of a reservoir for determining multiphase flow parameters of a porous medium such as a rock, from the interpretation of displacement experiments. From an injection experiment on a rock sample, the saturation pro...	02/19/2008
7096944	Well fluids and methods of use in subterranean formations The present invention relates to improved well fluids that include hollow particles, and to methods of using such improved well fluids in subterranean cementing operations. The present invention provides methods of cementing, methods of reducing annular pressure, an...	08/29/2006
7082812	Method and device for evaluating physical parameters of an underground reservoir from rock cuttings taken therefrom Method and device for evaluating, simultaneously and with a single equipment, physical parameters such as the absolute permeability and the porosity of fragments taken from a fragmented artificial or natural porous medium. The porosity of the fragments is mea...	08/01/2006
7072809	Method for modelling fluid displacements in a porous environment taking into account hysteresis effects A modelling method having application to petroleum production, soil cleaning, etc. for optimizing faster and more realistically the displacement conditions, in a porous medium wettable by a first fluid (water for example), of a mixture of fluids including this wetti...	07/04/2006
7032661	Method and apparatus for combined NMR and formation testing for assessing relative permeability with formation testing and nuclear magnetic resonance testing Formation testing, resistivity and NMR measurements are used concurrently to determine a relative permeability representative of a formation surrounding the borehole. A method and apparatus is provided for accurate determination of the relative permeability for a fo...	04/25/2006
6912898	Use of cesium as a tracer in coring operations A method for measuring the infiltration of coring fluid into a core sample taken from a formation comprises a) providing a coring fluid containing cesium in a first concentration, b) using the coring fluid and a coring means to generate the core sample, c) determini...	07/05/2005
6910535	Method for enhancing the stability of a water sensitive, reactive subterranean formation The current invention provides a method for enhancing the formation stability of water sensitive, reactive formations penetrated by a wellbore. The method of the current invention provides an accurate evaluation of the impact of cementing fluids on water sensitive, ...	06/28/2005
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 for measuring well core characteristics in-situ or in a laboratory. One...	09/07/2004
6435008	Apparatus and method for determining porosity The present invention is related to an apparatus and a non-destructive method for determining the porosity of an element, particularly a thin film, formed on a substrate, said substrate being positioned in a pressurized chamber, said chamber being at a pr...	08/20/2002
6401523	Device for testing rock samples at relatively high pressure and temperature Device for studying physical properties of a solid sample (S) in the presence of fluids, at relatively high temperature and pressure. The device comprises an elongate rigid body (1) closed at the opposite ends thereof by two covers (2, 3), a flexible shea...	06/11/2002
6247358	Method for the evaluation of shale reactivity Shale reactivity is evaluated by testing a preserved test plug of shale sample in a triaxial test machine, the test plug being prepared by collecting a downhole shale sample and keeping it all times immersed in a preserving mineral oil so as to avoid dehy...	06/19/2001
6009747	Method for evaluating drilling fluids A method for evaluating drilling fluids to be used with clay-rich rocks such as shales which comprises collecting shales so as to preserve the downhole hydration condition and then submitting such preserved shale to Thermo-Gravimetric Analysis, so as to o...	01/04/2000
5828981	Generating pore types and synthetic capillary pressure curves from wireline logs using neural networks Methods of directly analyzing wireline well logging data to derive pore types, pore volumes and capillary pressure curves from the wireline logs are disclosed. A trained and validated neural network is applied to wireline log data on porosity, bulk densit...	10/27/1998
5698772	Method and device for determining different physical parameters of porous material samples in the presence of two-phase or three-phase fluids A sample S is placed in a rigid body 1 of a device, in a containment cell laterally delimited by a supple sheath 21 and, at the two opposite ends thereof, by two cell ends 13, 14. Channels (15, 16) in these ends communicate with the sample, by means of se...	12/16/1997
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 (kr), static capillary pressure, dynamic capillary pressure (Pc), and electrical resistivity (Rt) of a core sample taken from a s...	02/20/1996
5359194	X-ray CT measurement of secondary (vugular) porosity in reservoir core material A method for determining the secondary (Vugular) porosity of a reservoir core sample uses X-ray (CT) computed tomography to quantify the porosity. This is then compared with log derived secondary porosity and used to quantify secondary porosity heterogene...	10/25/1994
5263360	Low permeability subterranean formation testing methods and apparatus The present invention provides methods and apparatus for determining the gas permeability of very low permeability subterranean formations as well as the gas permeability reducing effects of injecting one or more treatment fluids thereinto. A gas is injec...	11/23/1993
5063509	Method for determining density of samples of materials employing X-ray energy attenuation measurements X-ray attenuation measurements at two or more energies are carried out on core samples of earth materials for use in determining relative Compton scattering and photoelectric contributions to attenuation. The measurements are utilized to calculate materia...	11/05/1991
4920792	Method for determining the amount of fluid in a core Methods and apparatus are provided to extract oil and brine fluids from a representative porous sample. The petrophysical properties of these extracted oil and brine fluids may be determined by conventional or other testing methods. The oil fluids and bri...	05/01/1990
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 multiple component fluid; introducing the fluid between the fra...	03/13/1990
4893504	Method for determining capillary pressure and relative permeability by imaging The present invention provides methods and apparatus for determining relative permeability and capillary pressure employing saturation profile images of fluids in a porous sample obtained by imaging apparatus. The methods employ saturation profiles of a f...	01/16/1990
4860582	Method and device for assessing the clogging risks of a well or bore hole passing through a porous revervoir, more particularly a geological formation A method and device are provided for assessing the clogging risks of a well or bore hole into which a fluid is injected or pumped. According to this method controlled amounts of said fluid are caused to flow through a plurality of samples representative o...	08/29/1989
4799382	Method for determining reservoir characteristics of a porous material Measurements of reservoir characteristics of a core sample of a subsurface formation are carried out with the core sample being subjected to pressure cycling. Pore volume changes during such pressure cycling are measured. Pore compressibility is determine...	01/24/1989
4790180	Method for determining fluid characteristics of subterranean formations Core samples are obtained from a plurality of differing depths in a subterranean formation. The samples are dried to effect an evaporation of the water content, leaving behind a salt precipitate. The dried samples are weighed. The salt precipitate is then...	12/13/1988
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 $c;o as a function of total effective formation porosity $c;E and height h above the oil water contact from capillary pressure...	06/14/1988
4740077	Centrifugal measurement of core samples An adaptable, accurate, high resolution centrifuge core measuring method using a single strobe flash per measurement uses a microprocessor controller to control the measuring method, not a computer. The controller, not the camera clock, decides when the c...	04/26/1988
4699002	Process and apparatus for analyzing cuttings from oil and gas wells A process for analyzing a sample of cuttings from oil or gas wells includes as its first step and determination of the water and light hydrocarbon content of the sample. The sample may then be sieved to remove any powders which may affect subsequent steps...	10/13/1987
4669299	Measuring relative permeability to steam in cores of water and oil containing reservoir formations Relative permeabilities to flowing steam water and/or oil phases within cores of earth formations are determined by flowing such fluids at reservoir conditions, sealing them within the cores, X-ray scanning the sealed cores and determining the saturations...	06/02/1987
4608859	Process and apparatus for analyzing cutting from oil and gas wells A process for analyzing a sample of cuttings from oil or gas wells includes as its first step the determination of the water and light hydrocarbon content of the sample. The sample may then be sieved to remove any powders which may affect subsequent steps...	09/02/1986
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 that the liquids mix to form a two phase liquid which moves t...	10/01/1985
4542648	Method of correlating a core sample with its original position in a borehole A method of correlating a core sample with its original position in a borehole. The borehole is logged to determine the bulk density of the formation surrounding the borehole. The core sample is scanned with a computerized axial tomographic scanner (CAT) ...	09/24/1985
4482634	Chemical flood testing method A method of testing a chemical for use in an enhanced recovery of oil from an earth formation includes obtaining a test core of an earth formation. The test core is cleaned and then subjected to a predetermined sequence of events similar to that which the...	11/13/1984
4304122	Deep well simulator An apparatus for measuring the permeability of solids at any given condition of pressure and temperature and flow rate, the control of pressure being achieved without a valve by using capillary tubing containing an oil. The apparatus is capable of operati...	12/08/1981

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Class 73/152.07 - By a core sample analysis