US 2026/0227545 A1 · SYSTEM AND METHOD FOR CALIBRATING THROUGH-CASING ELECTROMAGNETIC INSTRUMENTS

Abstract

A calibration system for a through-casing electromagnetic instrument, includes a casing; multiple coils wound outside the casing for simulating the resistivities of different depth formations respectively when one or more current or voltage signals are applied; a transmitter connected to the multiple coils and configured to provide the voltage or current signal to each of the multiple coils based on a control signal; and a control system in communication with the transmitter. The control system is configured to: generate the control signal based on a resistivity corresponding to the formation and a radial detection range to be simulated; and send the control signal to the transmitter so that the transmitter generates the voltage or current signal based on the control signal. A method for calibrating a through-casing electromagnetic instrument, a control system, a machine-readable storage medium, and a computer program product are also provided.

Claims19

Dependent claims

A calibration system for a through-casing electromagnetic instrument, comprising:

a casing, which is hollow and structured to hold the electromagnetic instrument;
multiple coils wound outside the casing, wherein the multiple coils are arranged side by side and have a certain distance from each other for simulating the resistivities of different depth formations respectively when one or more current or voltage signals are applied;
wherein the adjacent coils of the multiple coils are configured to simulate the resistivities of adjacent formations at different depths;
a transmitter, connected to the multiple coils, and configured to provide the voltage or current signal to each of the multiple coils based on a control signal;
and
a control system, communicated with the transmitter, wherein the control system is configured to:
generate the control signal based on a resistivity corresponding to the formation and a radial detection range to be simulated;
and
send the control signal to the transmitter so that the transmitter generates the voltage or current signal based on the control signal.

6 more elements

A method for calibrating a through-casing electromagnetic instrument, comprising:

obtaining, by a control system, the resistivity corresponding to the formation to be simulated;
generating, by the control system, a control signal based on the resistivity corresponding to the formation and a radial detection range to be simulated;
and
sending, by the control system, the control signal so that the transmitter generates a voltage or current signal based on the control signal;
where the voltage or current signal is to be input into multiple side-by-side arranged coils so that the multiple coils simulate the resistivities of different depth formations, wherein the multiple coils are wound outside the casing and arranged side by side with a certain distance from each other, wherein the multiple coils are structured to simulate the resistivities of different depth formations respectively when the current or voltage is applied and the adjacent coils of the multiple coils are structured to simulate the resistivities of adjacent formations at different depths.

2 more elements

Dependencies are inferred from the claim text.

System and method for calibrating through-casing electromagnetic instruments

Life of this patent

System and method for calibrating through-casing electromagnetic instruments

Life of this patent

Abstract

Claims19