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US 10,649,109 B2Granted
Apparatus and method of processing multi-component induction data
AssigneeHalliburton Energy Services, Inc.
InventorsLuis Emilio San Martin, Junsheng Hou
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Abstract
Various embodiments include apparatus and methods to utilize signals acquired from a multi-component induction tool operating in a wellbore. The acquired signals can be correlated to apparent conductivity of a formation and mapped to components of an apparent conductivity tensor. For each receiver array operated by the multi-component induction tool, a combination of these components from the acquired signals can be generated. Combinations generated from different receivers of the multi-component induction tool can be mixed together. From such combinations, data, with respect to evaluation of formation around the wellbore, can be generated. Additional apparatus, systems, and methods are disclosed.
Claims37
A method comprising:
- acquiring signals indicative of electromagnetic properties of a downhole formation generated from operating a multi-component induction tool in a wellbore, the multi-component induction tool having at least one transmitter triad and a plurality of receiver arrays, each receiver array having a receiver triad;
- generating under control of a processor, for each receiver triad at a fixed frequency, one or more combinations of components from the acquired signals, the components corresponding to components of an apparent conductivity tensor;
- for each of one or more receiver triads, combining, under control of the processor, a geometric factor associated with each receiver of the receiver triad to form a respective combination of the geometric factors, wherein the receivers of the receiver triad are oriented in different directions;
- generating, under control of the processor, filters based on (i) the one or more combinations of geometric factors and (ii) a target function, wherein each of the one or more combinations of geometric factors correlates the electromagnetic properties of the downhole formation to the apparent conductivity tensor;
- mixing together, under control of the processor, combinations measured from the plurality of receiver arrays, wherein the mixing comprises applying the filters to the one or more combinations of components;
- and
- generating, under control of the processor, data indicative of the electromagnetic properties of the downhole formation, with respect to evaluation of a formation around the wellbore, from the mixing together combinations, wherein the data has an improved resolution at multiple depths of investigation compared to the acquired signals.
4 more elements
A machine-readable storage device having instructions stored thereon, which, when performed by a machine, cause the machine to perform operations, the operations comprising:
- acquiring signals indicative of electromagnetic properties of a downhole formation generated from operating a multi-component induction tool in a wellbore, the multi-component induction tool having at least one triaxial transmitter triad and a plurality of receiver arrays, each receiver array having a receiver triad;
- generating under control of a processor, for each receiver triad at a fixed frequency, one or more combinations of components from the acquired signals, the components corresponding to components of an apparent conductivity tensor;
- for each of one or more receiver triads, combining, under control of the processor, a geometric factor associated with each receiver of the receiver triad to form a respective combination of the geometric factors, wherein the receivers of the receiver triad are oriented in different directions;
- generating, under control of the processor, filters based on (i) the one or more combinations of geometric factors and (ii) a target function, wherein each of the one or more combinations of geometric factors correlates the electromagnetic properties of the downhole formation to the apparent conductivity tensor;
- mixing together, under control of the processor, combinations measured from the plurality of receiver arrays, wherein the mixing comprises applying the filters based on the one or more combinations of geometric factors to the one or more combinations of different coupling components;
- and
- generating, under control of the processor, data indicative of the electromagnetic properties of the downhole formation, with respect to evaluation of a formation around the wellbore, from the mixing together combinations, wherein the data has an improved resolution at multiple depths of investigation compared to the acquired signals.
4 more elements
A system comprising:
- a tool structure, the tool structure being a multi-component induction tool structure having a transmitter array and a plurality of receiver arrays, each receiver array having a receiver triad, the multi-component induction tool structure capable of operating in a wellbore;
- and
- a processing unit structured to:
- acquire signals indicative of electromagnetic properties of a downhole formation from the tool structure;
- generate, under control of a processor, for each receiver triad at a fixed frequency, one or more combinations of components from the acquired signals, the components corresponding to components of an apparent conductivity tensor;
- for each of one or more receiver triads, combine, under control of the processor, a geometric factor associated with each receiver of the receiver triad to form a respective combination of the geometric factors, wherein the receivers of the receiver triad are oriented in different directions;
- generate filters based on (i) the one or more combinations of geometric factors and (ii) a target function, wherein each of the one or more combinations of geometric factors correlates the electromagnetic properties of the downhole formation to the apparent conductivity tensor;
- mix together combinations measured from the plurality of receiver arrays, wherein the mixing comprises applying the filters based on the one or more combinations of geometric factors to the one or more combinations of different coupling components;
- and
- generate data indicative of the electromagnetic properties of the downhole formation, with respect to evaluation of formation around the wellbore, from the mixed together combinations, wherein the data has an improved resolution at multiple depths of investigation compared to the acquired signals.
7 more elements
Dependencies are inferred from the claim text.