US 2019/0113648 A1Published application

Methods And Systems For Determining Formation Properties And Pipe Properties Using Ranging Measurements

AssigneeHalliburton Energy Services, Inc.

InventorsHsu-Hsiang Wu, Burkay Donderici

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Abstract

Methods and systems are presented in this disclosure for estimation of formation properties and pipe properties using ranging measurements. Embodiments of the present disclosure utilize ranging measurements to first determine a defined slope (e.g., leakage rate) of an electrical current signal flowing along a wellbore. The determined slope (e.g., leakage rate) may be then used to estimate properties of a formation surrounding the wellbore (e.g., formation resistivity) and properties of a conductive material (casing pipe) deployed in the wellbore (e.g., pipe resistance). Based on the estimated properties of the formation and the conductive material, drilling operation in a drilling well can be adjusted, and repair of defects or mechanical deformations on the casing pipe can be initiated.

Claims21

Dependent claims

A system for estimating formation properties and casing properties, the system comprising:

an electrical current source or a voltage source configured to generate an electrical current of at least one frequency flowing along a casing pipe in a first wellbore;
at least two sensors attached to a logging tool operating in a second wellbore, wherein the at least two sensors are configured to measure information associated with a plurality of depths of the first wellbore generated by the electrical current of the at least one frequency;
at least one processor;
and
a memory coupled to the processor having instructions stored therein, which when executed by the processor, cause the processor to perform functions, including functions to:
determine, based on the measured information, at least one measured response related to each frequency of the electrical current;
calculate, using modeling based at least in part on one or more parameters associated with the first wellbore, at least one of first modeled responses related to a set of property values of a formation surrounding the first wellbore or second modeled responses related to a set of property values of the casing pipe;
and
estimate at least one of a property of the formation or a property of the casing pipe by matching the at least one of the first modeled responses or the second modeled responses with the at least one measured response.

6 more elements

A method for estimating formation properties and casing properties, the method comprising:

generating an electrical current of at least one frequency flowing along a casing pipe in a first wellbore;
mounting at least two sensors on a logging tool operating in a second wellbore;
measuring, by the at least two sensors, information associated with a plurality of depths of the first wellbore generated by the electrical current of the at least one frequency;
determining, based on the measured information, at least one measured response related to each frequency of the electrical current;
calculating, using modeling based at least in part on one or more parameters associated with the first wellbore, at least one of first modeled responses related to a set of property values of a formation surrounding the first wellbore or second modeled responses related to a set of property values of the casing pipe;
and
estimating at least one of a property of the formation or a property of the casing pipe by is matching the at least one of the first modeled responses or the second modeled responses with the at least one measured response.

4 more elements

Dependencies are inferred from the claim text.