Obtaining and evaluating downhole samples with a coring tool
First Claim
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1. A method of preserving hydrocarbon samples obtained from an underground formation, comprising:
- delivering an apparatus comprising a coring tool to the formation;
obtaining a first core sample from the formation using the coring tool, the first core sample including a hydrocarbon therein;
capturing the first core sample in a first container in the apparatus;
obtaining a second core sample from the formation using the coring tool, the second core sample including the hydrocarbon therein;
capturing the second core sample in a second container in the apparatus;
sealing the first container downhole with the hydrocarbon contained therein, wherein sealing the first container includes abutting the second container to an open end of the first container downhole;
storing the sealed first container in the apparatus; and
retrieving the apparatus with the sealed first container to the surface.
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Abstract
Samples of hydrocarbon are obtained with a coring tool. An analysis of some thermal or electrical properties of the core samples may be performed downhole. The core samples may also be preserved in containers sealed and/or refrigerated prior to being brought uphole for analysis. The hydrocarbon trapped in the pore space of the core samples may be extracted from the core samples downhole. The extracted hydrocarbon may be preserved in chambers and/or analyzed downhole.
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Citations
8 Claims
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1. A method of preserving hydrocarbon samples obtained from an underground formation, comprising:
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delivering an apparatus comprising a coring tool to the formation; obtaining a first core sample from the formation using the coring tool, the first core sample including a hydrocarbon therein; capturing the first core sample in a first container in the apparatus; obtaining a second core sample from the formation using the coring tool, the second core sample including the hydrocarbon therein; capturing the second core sample in a second container in the apparatus; sealing the first container downhole with the hydrocarbon contained therein, wherein sealing the first container includes abutting the second container to an open end of the first container downhole; storing the sealed first container in the apparatus; and retrieving the apparatus with the sealed first container to the surface. - View Dependent Claims (2, 3, 4)
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5. A method of preserving hydrocarbon samples obtained from an underground formation, comprising:
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delivering an apparatus comprising a coring tool, a core holder, a rail, a refrigeration system, and a pump to the formation; obtaining a core sample from the formation using the coring tool; receiving the sample in the core holder; supporting the core holder via the rail; cooling the core sample in the core holder via circulating a coolant from the refrigeration system through the rails with the pump; and retrieving the apparatus with the cooled core sample to the surface. - View Dependent Claims (6, 7, 8)
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Specification