Subsurface formation radial profiling using combined processing of omni-directional and pad-type tools

Patent metadata

Field	Value
Publication number	US-12460531-B2
Application number	US-202217664109-A
Country	US
Kind code	B2
Filing date	May 19, 2022
Priority date	May 19, 2022
Publication date	Nov 4, 2025
Grant date	Nov 4, 2025

Abstract

Systems and methods to generate radial resistivity profiles of formations using combined measurements from omni-directional and pad-type tools are described. Measurements from a pad-type resistivity tool are obtained along a wellbore drilled through a subsurface formation. Measurements from an omni-directional resistivity tool (e.g., a dual laterolog) are also obtained. The measurements from the pad-type and omni-directional tools are then combined and used to generate a radial resistivity profile of the formation.

First claim

What is claimed is:

1 . A computer-implemented method to generate a radial resistivity profile of a subsurface formation, the method comprising:
obtaining measurements from a pad-type resistivity tool positioned along a wellbore drilled through a subsurface formation, wherein the pad-type resistivity tool is a water-based mud resistivity imager, oil-based mud resistivity imager, dielectric tool, or a microspherically focused logging tool; obtaining measurements from an omni-directional resistivity tool positioned along the wellbore; combining the measurements from the pad-type and omni-directional resistivity tools by at least matching a depth or a resolution of the measurements from the pad-type and omni-directional resistivity tools; and generating a radial resistivity profile of the subsurface formation using the combined measurements.

2 . The computer-implemented method as defined in claim 1 , wherein the pad-type resistivity tool comprises:
a multiple pad tool and a single pad tool; or a multiple pad tool.

3 . The computer-implemented method as defined in claim 1 , wherein:
the omni-directional resistivity tool is a dual laterolog, array laterolog or an array induction tool.

4 . The computer-implemented method as defined in claim 1 , wherein generating the radial resistivity profile comprises applying depth matching to the pad-type and omni-directional resistivity measurements.

5 . The computer-implemented method as defined in claim 4 , wherein generating the radial resistivity profile further comprises applying resolution matching to the pad-type and omni-directional resistivity measurements.

6 . The computer-implemented method as defined in claim 5 , wherein:
the pad-type resistivity tool comprises a multiple pad resistivity tool; and generating the radial resistivity profile further comprises averaging the multiple pad resistivity measurements over an azimuthal direction.

7 . The computer-implemented method as defined in claim 6 , wherein generating the radial resistivity profile further comprises combining the averaged azimuthal measurements with the omni-directional resistivity measurements.

8 . The computer-implemented method as defined in claim 6 , further comprising:
scaling the averaged azimuthal measurements using a scaling factor calculated from measurements of a single pad tool and the multiple pad resistivity tool; and combining the scaled measurement with measurements of the omni-directional tool to generate the resistivity profile.

9 . The computer-implemented method as defined in claim 8 , wherein scaling the average azimuthal measurements comprises:
filtering non-averaged azimuthal measurements to match an azimuthal position of the single pad tool to calculate a scaling coefficient; and applying the scaling coefficient to the averaged azimuthal measurements.

10 . The computer-implemented method as defined in claim 1 , wherein:
the pad-type resistivity and omni-directional tools are calibrated using a dedicated calibrator; or the pad-type resistivity and omni-directional tools are calibrated in-situ.

11 . The computer-implemented method as defined in claim 1 , wherein an inversion is applied to the combined measurements to determine radial boundaries and resistivities of layers of the formation.

12 . The computer-implemented method as defined in claim 10 , wherein the tools are calibrated in-situ in a homogeneous formation, layers of the homogeneous formation being determined based upon a variation of measurements within the layers.

13 . The computer-implemented method as defined in claim 1 , further comprising adjusting a planned path of the wellbore for one or more subsequent stages of a downhole operation, based upon the radial resistivity profile.

14 . A system comprising:
a processor; and a memory coupled to the process having instructions stored therein, which, when executed by the processor, causes the process to perform a plurality of functions, including functions to:
obtain measurements from a pad-type resistivity tool positioned along a wellbore drilled through a subsurface formation, wherein the pad-type resistivity tool is a water-based mud resistivity imager, oil-based mud resistivity imager, dielectric tool, or a microspherically focused logging tool;
obtain measurements from an omni-directional resistivity tool positioned along the wellbore;
combine the measurements from the pad-type and omni-directional resistivity tools by at least matching a depth or a resolution of the measurements from the pad-type and omni-directional resistivity tools; and
generate a radial resistivity profile of the subsurface formation using the combined measurements.

15 . The system as defined in claim 14 , wherein the pad-type resistivity tool comprises:
a multiple pad tool and a single pad tool; or a multiple pad tool.

16 . The system as defined in claim 14 , wherein generating the radial resistivity profile comprises applying depth matching to the pad-type and omni-directional resistivity measurements.

17 . A non-transitory computer-readable storage medium having instructions stored therein, which, when executed by a computer, cause the computer to perform a plurality of functions, including functions to:
obtain measurements from a pad-type resistivity tool positioned along a wellbore drilled through a subsurface formation, wherein the pad-type resistivity tool is a water-based mud resistivity imager, oil-based mud resistivity imager, dielectric tool, or a microspherically focused logging tool; obtain measurements from an omni-directional resistivity tool positioned along the wellbore; combine the measurements from the pad-type and omni-directional resistivity tools by at least matching a depth or a resolution of the measurements from the pad-type and omni-directional resistivity tools; and generate a radial resistivity profile of the subsurface formation using the combined measurements.

18 . The computer-readable storage medium as defined in claim 17 , wherein the pad-type resistivity tool comprises:
a multiple pad tool and a single pad tool; or a multiple pad tool.

19 . The computer-readable storage medium as defined in claim 17 , wherein generating the radial resistivity profile comprises applying depth matching to the pad-type and omni-directional resistivity measurements.

20 . The computer-readable storage medium as defined in claim 17 , further comprising assessing a feasibility of a hydrocarbon production plan based upon the radial resistivity profile.

Assignees

• Halliburton Energy Services Inc

Inventors

• Guner Baris
• Fouda Ahmed E

Classifications

• G01V3/38

  Processing data, e.g. for analysis, for interpretation, for correction · CPC title

• G01V3/28 Primary

  using induction coils · CPC title

• E21B2200/20

  Computer models or simulations, e.g. for reservoirs under production, drill bits · CPC title

• E21B47/0025 Primary

  generating an image of the borehole wall using down-hole measurements, e.g. acoustic or electric · CPC title