Berthold F Kriegshauser

6466872, Oct 15, 2002

Sep 29, 2000

09/676097

Berthold F. Kriegshauser - Houston TX
Otto N. Fanini - Houston TX
Pravin Gupta - Poorkie, IN
Liming Yu - Stafford TX

Baker Hughes Incorporated - Houston TX

G01V 318

702 7, 702 11

Shoulder corrections are applied to measurements obtained from a multicomponent electromagnetic logging tool. An anisotropic resistivity model is obtained using the shoulder corrected data. The process is iterated until a good match is obtained between the shoulder corrected data and the model output.

6470274, Oct 22, 2002

Mar 30, 2000

09/539053

Richard A. Mollison - Tomball TX
Otto N. Fanini - Houston TX
Berthold Kriegshauser - Houston TX
Milomir Pavlovic - Houston TX

Baker Hughes Incorporated - Houston TX

G01V 338

702 7, 702 12

The total porosity of said formation, a fractional volume of the shale, and a resistivity of the shale are determined in a laminated reservoir including sands that may have dispersed shales therein. A tensor petrophysical model determines the laminar shale volume and laminar sand conductivity from vertical and horizontal conductivities derived from multi-component induction log data. NMR data are used to obtain measurements of the total clay-bound water in the formation and the clay bound water in shales in the formation.

6493632, Dec 10, 2002

Dec 28, 1999

09/474049

Richard A. Mollison - Tomball TX
Juergen S. Schoen - Leoben, AT
Otto N. Fanini - Houston TX
Berthold Kriegshauser - Houston TX
Milomir Pavlovic - Houston TX

Baker Hughes Incorporated - Houston TX

G01V 700

702 2, 703 10

The total porosity of a formation, a fractional volume of the shale, and a resistivity of the shale are determined in a laminated reservoir including sands that may have dispersed shales therein. A tensor petrophysical model determines the laminar shale volume and laminar sand conductivity from vertical and horizontal conductivities derived from multi-component induction log data. The volume of dispersed shale and the total and effective porosities of the laminar sand fraction are determined using a Thomas-Stieber-Juhasz approach. Removal of laminar shale conductivity and porosity effects reduces the laminated shaly sand problem to a single dispersed shaly sand model to which the Waxman-Smits equation can be applied.

6553314, Apr 22, 2003

Sep 17, 2002

10/244960

Berthold F. Kriegshauser - Houston TX
Otto N. Fanini - Houston TX
Pravin Gupta - Roorkie, IN
Liming Yu - Stafford TX

Baker Hughes Incorporated - Houston TX

G01V 338

702 7

Shoulder corrections are applied to measurements obtained from a multi-component electromagnetic logging tool. An anisotropic resistivity model is obtained using the shoulder corrected data. The process is iterated until a good match is obtained between the shoulder corrected data and the model output.

6643589, Nov 4, 2003

Mar 5, 2002

10/091310

Zhiyi Zhang - Houston TX
Liming Yu - Stafford TX
Leonty Abraham Tabarovsky - Houston TX
Berthold Kriegshauser - Houston TX

Baker Hughes Incorporated - Houston TX

G01V 318

702 7, 702 10

Measurements made by a multicomponent logging tool in a borehole are inverted to obtain horizontal and vertical resistivities and formation dip and azimuth angles of a formation traversed by the borehole. The inversion is performed using a generalized Marquardt-Levenberg method. In this generalized Marquardt-Levenberg method, a data objective function is defined that is related to a difference between the model output and the measured data. The iterative procedure involves reducing a global objective function that is the sum of the data objective function and a model objective function related to changes in the model in successive iterations. In an alternate embodiment of the invention, the formation azimuth angle is excluded from the iterative process by using derived relations between the multicomponent measurements.

6711502, Mar 23, 2004

Oct 17, 2002

10/273216

Richard A. Mollison - Tomball TX
Juergen S. Schoen - Leoben, AU
Otto N. Fanini - Houston TX
Berthold Kriegshauser - Houston TX
Milomir Pavlovic - Houston TX

Baker Hughes Incorporated - Houston TX

G01V 338

702 6, 702 2, 702 7

The total porosity of said formation, a fractional volume of the shale, and a resistivity of the shale are determined in a laminated reservoir including sands that may have dispersed shales therein. A tensor petrophysical model determines the laminar shale volume and laminar sand conductivity from vertical and horizontal conductivities derived from multi-component induction log data. The volume of dispersed shale and the total and effective porosities of the laminar sand fraction are determined using a Thomas-Stieber-Juhasz approach. Removal of laminar shale conductivity and porosity effects reduces the laminated shaly sand problem to a single dispersed shaly sand model to which the Waxman-Smits equation can be applied.

6885947, Apr 26, 2005

Jul 1, 2002

10/186927

Jiaqi Xiao - Houston TX, US
Berthold Kriegshauser - Houston TX, US
Otto Fanini - Houston TX, US
Liming Yu - Stafford TX, US
Gulamabbas A. Merchant - Houston TX, US

Baker Hughes Incorporated - Houston TX

G01V001/28

702 17, 702 6, 702 7

Data are acquired using multi-array logging tool in a borehole having an angle of inclination to a normal to the bedding plane of earth formations. The multi-array measurements are filtered using angle dependent filters to give a filtered curve corresponding to a target one of the multi-array measurements using angle dependent filters. Correlation coefficients are determined for a set of possible dip angles and a relative dip angle is estimated from the correlation coefficients. This dip angle estimate together with bed boundaries obtained from the multi-array measurements are used for inverting multi-component measurements alone or jointly with multi-array measurements to refine the relative dip angle interpretation and give horizontal and vertical formation resistivity.

6900640, May 31, 2005

Aug 7, 2002

10/214436

Otto N. Fanini - Houston TX, US
Stanislav W. Forgang - Houston TX, US
Berthold Kriegshauser - Houston TX, US
Liming Yu - Stafford TX, US

Baker Hughes Incorporated - Houston TX

G01V003/18

324339

An improved induction tool for formation resistivity evaluations. The tool provides electromagnetic transmitters and sensors suitable for transmitting and receiving magnetic fields in radial directions that are orthogonal to the tool's longitudinal axis with minimal susceptibility to errors associated with parasitic eddy currents induced in the metal components surrounding the transmitter and receiver coils. Various transmitter receiver combinations are provided to select sensitivity to a desired reservoir formation properties, for example, different orientations xy, xz, yz, 20-40, 20-90, and combinations, such as, Symmetric—symmetric; Asymmetric—symmetric; and Asymmetric—asymmetric. Measurements made with a multi-component logging instrument when used in a substantially horizontal, vertical or deviated borehole in earth formations are diagnostic of the direction of resistive beds relative to the position of the borehole.