Marek Zbigniew Kozak

Author:

Marek Kozak

ISBN #:

8320807727

Author:

Marek Kozak

ISBN #:

8387703699

US Patent:

7471591, Dec 30, 2008

Filed:

Dec 21, 2005

Appl. No.:

11/316024

Inventors:

Lucio N. Tello - Benbrook TX, US
Thomas J. Blankinship - Fort Worth TX, US
Edwin K. Roberts - Fort Worth TX, US
Marek Kozak - Newark CA, US

Assignee:

Precision Energy Services, Inc. - Fort Worth TX

International Classification:

G01V 1/00

US Classification:

367 25, 367 31

Abstract:

An acoustic logging system with a borehole tool comprising a transmitter assembly and an axially spaced receiver assembly. The transmitter and receiver assemblies are optionally rotatable with respect to each other, depending upon the embodiment of the logging system. The logging system is designed to measure, among other parameters, the velocity (or slowness) and amplitude of shear wave energy induced by the transmitter assembly within formation penetrated by the borehole. These parameters are extracted from full wave acoustic data responses of receiver elements comprising the receiver assembly, and are measured as a function of azimuth around the borehole. These parameters are subsequently used to determine anisotropic properties of the formation, such as the azimuthal direction of formation fracturing with respect to the well borehole. Optional rotation of the transmitter and receiver assemblies minimizes adverse effects of maintaining calibration and balance of multiple transmitters and receivers.

US Patent:

58319344, Nov 3, 1998

Filed:

Jul 24, 1997

Appl. No.:

8/901230

Inventors:

Stephen P. Gill - Aherton CA
Timothy Prowten - San Jose CA
Marek Z. Kozak - Fremont CA

International Classification:

G01V 140

US Classification:

367 25

Abstract:

A method for analyzing received wave signal data in an acoustic logging system that includes a logging tool adapted to be moved through a borehole in the earth and comprising a transmitter section and receiver section, wherein the transmitter section produces sonic waves at periodic intervals which are received as wave signal data by the receiver section. The method comprises the steps of processing the received wave signal data using Fourier Transform procedures, filtering the processed data using a Heisenberg filter procedure, using a Hilbert transform to refine the filtered data, and using the refined data to provide a phase velocity analysis.

US Patent:

58522620, Dec 22, 1998

Filed:

Sep 28, 1995

Appl. No.:

8/535968

Inventors:

Stephen P. Gill - Atherton CA
Timothy Prowten - San Jose CA
Marek Z. Kozak - Fremont CA

Assignee:

Magnetic Pulse, Inc. - Fremont CA

International Classification:

G01V 140

US Classification:

181106

Abstract:

An acoustic formation logging tool includes a transmitter, a receiver, a tube wave absorber, and a digital signal processing section. The transmitter includes an electromagnetic actuator based on capacitive discharge through a coil, producing an intense magnetic pressure which causes an actuator to move into an oil-filled acoustic waveguide. The actuator includes a pusher plate with holes that reduces cavitation and is capable of operation at great depths commonly encountered in oil well logging. Pulse power and spectrum of the acoustic transmitter are sufficient to measure either reflections from distant geological structures or waves propagating through the formation near the borehole. A positive acoustic pulse and a symmetric negative acoustic pulse are generated by action of the actuator on the acoustic waveguide. By directing and diverting the positive and negative pulses, a plurality of acoustic transmitters in a tool provide for operation in a multiplicity of modes: monopole, dipole, quadrupole, and a new unipole mode.

US Patent:

59369132, Aug 10, 1999

Filed:

Jul 24, 1997

Appl. No.:

8/900242

Inventors:

Stephen P. Gill - Atherton CA
Timothy Prowten - San Jose CA
Marek Z. Kozak - Fremont CA

Assignee:

Magnetic Pulse, Inc - Fremont CA

International Classification:

G01V 140

US Classification:

367 25

Abstract:

A receiver section for an acoustic oil well logging tool comprised of a plurality of receiver sub-units connected longitudinally within a rigid tubular member. Each receiver sub-unit has a series of acoustic wave sensors located for receiving and detecting monopole, dipole, quadrupole and unipole waveforms. Separate channels are provided for conveying waveforms data from each receiver sub-unit to an above ground data processing unit. Each receiver sub-unit also includes a compensating sensor for detecting tool vibrations and for producing signals which are combined with waveform data in the processing unit to eliminate the effects of tool vibration.