SYSTEM AND METHOD FOR REAL-TIME MANAGEMENT OF FORMATION FLUID SAMPLING WITH A GUARDED PROBE
First Claim
1. A method for real-time management of sampling of formation fluids from an earth formation surrounding a wellbore, the region of the formation immediately surrounding the wellbore being at least partially invaded by wellbore fluids, comprising:
- withdrawing fluids from the earth formation;
sensing a physical or chemical property of the withdrawn fluids;
outputting a signal corresponding to the sensed physical or chemical property;
using the output signal to model properties of the withdrawn fluids; and
using the modeled properties of the fluid sample for the real-time management of the sampling of the formation fluids.
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Abstract
Embodiments of the present invention relate to systems and methods for real-time management of formation fluid sampling down a wellbore using a guarded probe. More specifically, but not by way of limitation, embodiments of the present invention provide for management of downhole fluid sampling by sensing properties of fluids collected by a downhole-fluid-sampling-device, modeling the fluid sampling process from these sensed properties and using the modeling of the fluid sampling process to manage in real-time the fluid sampling process.
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Citations
34 Claims
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1. A method for real-time management of sampling of formation fluids from an earth formation surrounding a wellbore, the region of the formation immediately surrounding the wellbore being at least partially invaded by wellbore fluids, comprising:
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withdrawing fluids from the earth formation; sensing a physical or chemical property of the withdrawn fluids; outputting a signal corresponding to the sensed physical or chemical property; using the output signal to model properties of the withdrawn fluids; and using the modeled properties of the fluid sample for the real-time management of the sampling of the formation fluids. - View Dependent Claims (2)
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3. A method for real-time management of sampling of formation fluids from an earth formation surrounding a wellbore, the region of the formation immediately surrounding the wellbore being at least partially invaded by wellbore fluids, comprising:
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lowering a wellbore tool with a fluid sampling device into the wellbore, the fluid sampling device comprising a sampling probe and a guard probe, wherein the sampling probe and the guard probe are adjacent to one another and wherein the sampling probe is configured for withdrawing a first fluid sample from the formation and the guard probe is configured for withdrawing a second fluid sample from the formation; urging the fluid sampling device into contact with a wellbore wall; withdrawing the first and the second fluid samples from the formation; determining a first property of the first fluid sample; determining a second property of the second fluid sample; and using a processor to process in real-time a delta value, wherein the delta value comprises a difference between the first property and the second property. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A system for monitoring sampling of formation fluids from an earth formation surrounding a wellbore, the region of the formation immediately surrounding the wellbore being at least partially invaded by wellbore fluids, comprising:
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a wellbore tool configured for use inside the wellbore; a sampling probe coupled with the wellbore tool and configured for withdrawing a first fluid sample from the formation; a guard probe coupled with the wellbore tool disposed adjacent to the sampling probe and configured for withdrawing a second fluid sample from the formation; a first sensor configured to measure a first property of the first fluid sample; a second sensor configured to measure a second property of the second fluid sample; and a processor configured to process in real-time a delta value, wherein the delta value comprises a difference between the first property and the second property. - View Dependent Claims (27, 28, 29, 31, 32, 33, 34)
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23. The system of 22, wherein the processor is configured to extrapolate in real-time a first contamination value of the first fluid sample or a second contamination value of the second fluid sample using the delta value.
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24. The system of 22, further comprising:
a collection container coupled with the sampling probe or the guard probe and configured for collecting a portion of the first or the second fluid sample.
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25. The system of 22, further comprising:
a collection container coupled with the first and the guard probe and configured for collecting a portion of the first and the second fluid sample. - View Dependent Claims (30)
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26. The system of 24, wherein the processor is configured to extrapolate in real-time a first contamination value of the first fluid sample or a second contamination value of the second fluid sample using the delta value, and wherein the processor is configured in real-time to control the collection container to collect a portion of the first or the second fluid sample based upon results of the extrapolation.
Specification