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US 11,230,923 B2Granted
Apparatus and method for determining properties of an earth formation with probes of differing shapes
OwnerMark A. Proettinventor
Life of this patent
Estimating the term…
Abstract
An improved formation testing method for measuring at least three formation parameters such as spherical permeability, permeability anisotropy, well bore skin damage, with at least two short duration pressure tests using a formation tester with two or more probe flow areas of different shapes.
Claims20
A method for estimating horizontal permeability, vertical permeability, or skin damage of an earth formation comprising the steps of:
- placing at least one probe with at least two apertures in sealing communication with the formation into a formation testing tool;
- wherein
- each individual aperture is in hydraulic communication with a pressure gauge;
- establishing hydraulic communication with the formation with at least two of said apertures;
- activating a piston in the formation tester tool to withdraw fluid from a first aperture of said at least two apertures;
- activating said piston in said formation tester to withdraw fluid from a second aperture of said at least two apertures;
- measuring pressure change during a piston deactivation and activation cycle with said first and second apertures simultaneously with two pressure gauges in communication with said at least two apertures;
- processing pressure data measurements from said first and second apertures and to determine the anisotropy Kv/Kh;
- processing pressure data from the pressure data measured from at least one aperture adjacent to a least one flowing aperture to determine formation skin damage S, horizontal permeability Kh and vertical permeability Kv.
6 more elements
An apparatus for estimating horizontal permeability, vertical permeability, or skin damage of an earth formation, comprising:
- at least one probe that is in sealing communication with the earth formation;
- said at least one probe comprises:
- two or more probe apertures of different shapes that are configured to be independently sealed in communication with said earth formation;
- a withdrawal piston, or pump, for withdrawal of, or injection of fluids into said earth formation from at least two probe apertures;
- a first gauge for measuring a pressure disturbance magnitude from said two or more probe apertures;
- a processor for estimating at least one earth formation property using said two or more apertures related to the difference in the shapes of said two or more apertures;
- a second gauge for measuring a component of at least one earth formation property that is directionally related to a spatial orientation of said two or more apertures by measuring the pressure from at least one aperture of said two or more apertures used to create the disturbance to at least one aperture of said two or more apertures monitoring the pressure disturbance.
4 more elements
An apparatus for estimating horizontal permeability, vertical permeability, or skin damage of an earth formation, comprising:
- at least two probes with singular apertures of different shapes that are in sealing communication with the earth formation;
- at least one probe of said at least two probes comprises;
- two or more probe apertures of different shapes that are configured to be independently sealed in communication with said earth formation;
- a withdrawal piston, or pump, for withdrawal of, or injection of fluids into said earth formation from at least two probe apertures;
- a first gauge for measuring a pressure disturbance magnitude from said two or more probe apertures;
- a processor for estimating at least one earth formation property using said two or more apertures related to the difference in the shapes of said two or more apertures;
- a second gauge for measuring a component of at least one earth formation property that is directionally related to a spatial orientation of said two or more apertures by measuring the pressure from at least one aperture of said two or more apertures used to create the disturbance to at least one aperture of said two or more apertures monitoring the pressure disturbance.
4 more elements
Dependencies are inferred from the claim text.