Wide Band Gap Semiconductor Photodetector Based Gamma Ray Detectors for Well Logging Applications
First Claim
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1. An apparatus configure to estimate a value of a property of an earth formation;
- the apparatus comprising;
a device configured to be conveyed in a borehole;
a scintillation detector associated with the device and configured to produce a light signal responsive to gamma rays indicative of the property;
a photodiode configured to produce an electrical signal responsive to the light signal; and
a processor configured to estimate the value of the property using the electrical signal;
wherein the scintillation detector has an output that matches a response characteristic of the photodiode.
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Abstract
A gamma ray detector uses a scintillation detector having a response that matches a response characteristic of a photodiode. The detector may be used to measure natural gamma rays and/or gamma rays produced by interaction of neutrons from a neutron source with the earth formation.
50 Citations
20 Claims
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1. An apparatus configure to estimate a value of a property of an earth formation;
- the apparatus comprising;
a device configured to be conveyed in a borehole; a scintillation detector associated with the device and configured to produce a light signal responsive to gamma rays indicative of the property; a photodiode configured to produce an electrical signal responsive to the light signal; and a processor configured to estimate the value of the property using the electrical signal; wherein the scintillation detector has an output that matches a response characteristic of the photodiode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- the apparatus comprising;
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11. A method of estimating a value of a property of an earth formation;
- the method comprising;
conveying a device configured into a borehole; using a scintillation detector associated with the device for producing a light signal responsive to gamma rays indicative of the property; using a. photodiode for producing an electrical signal responsive to the light signal, the scintillation detector having an output that matches a response characteristic of the photodiode; and using a processor for estimating the value of the property from the electrical signal. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
- the method comprising;
Specification