Focused sampling of formation fluids
First Claim
1. An apparatus for obtaining a fluid at a position within a wellbore that penetrates a subterranean formation, comprising:
- a body adapted to be disposed in the wellbore on a conveyance equipped with one or more expandable packers providing a sample region disposed between an upper cleanup zone and a lower cleanup zone when expanded into abutting contact with the wellbore wall;
an upper cleanup port provided at the upper cleanup zone, wherein the upper cleanup port is configured between at least two packers;
a lower cleanup port provided at the lower cleanup zone, wherein the lower cleanup port is configured between at least two packers;
at least one fluid cleanup flowline in fluid connection with the upper and lower cleanup ports;
a sampling inlet provided at the sampling region; and
a sampling flowline in fluid connection with the sampling inlet for drawing fluid from the sampling region wherein the sampling region is provided between an upper sampling packer section and a lower sampling packer section wherein the one or more expandable packers comprises an upper packer providing the upper sampling packer section and a lower packer providing the lower sampling packer section.
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Abstract
An apparatus for obtaining a fluid at a position within a wellbore that penetrates a subterranean formation includes a body adapted to be disposed in the wellbore on a conveyance equipped with one or more expandable packers providing a sample region disposed between an upper cleanup zone and a lower cleanup zone when expanded into abutting contact with the wellbore wall; an upper cleanup port provided at the upper cleanup zone; a lower cleanup port provided at the lower cleanup zone; at least one fluid cleanup flowline in fluid connection with the upper and lower cleanup ports; a sampling inlet provided at the sampling region; and a sampling flowline in fluid connection with the sampling inlet for drawing fluid from the sampling region.
49 Citations
10 Claims
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1. An apparatus for obtaining a fluid at a position within a wellbore that penetrates a subterranean formation, comprising:
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a body adapted to be disposed in the wellbore on a conveyance equipped with one or more expandable packers providing a sample region disposed between an upper cleanup zone and a lower cleanup zone when expanded into abutting contact with the wellbore wall; an upper cleanup port provided at the upper cleanup zone, wherein the upper cleanup port is configured between at least two packers; a lower cleanup port provided at the lower cleanup zone, wherein the lower cleanup port is configured between at least two packers; at least one fluid cleanup flowline in fluid connection with the upper and lower cleanup ports; a sampling inlet provided at the sampling region; and a sampling flowline in fluid connection with the sampling inlet for drawing fluid from the sampling region wherein the sampling region is provided between an upper sampling packer section and a lower sampling packer section wherein the one or more expandable packers comprises an upper packer providing the upper sampling packer section and a lower packer providing the lower sampling packer section.
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2. An apparatus for obtaining a fluid at a position within a wellbore that penetrates a subterranean formation, comprising:
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a body adapted to be disposed in the wellbore on a conveyance equipped with one or more expandable packers providing a sample region disposed between an upper cleanup zone and a lower cleanup zone when expanded into abutting contact with the wellbore wall; an upper cleanup port provided at the upper cleanup zone, wherein the upper cleanup port is configured between at least two packers; a lower cleanup port provided at the lower cleanup zone, wherein the lower cleanup port is configured between at least two packers; at least one fluid cleanup flowline in fluid connection with the upper and lower cleanup ports; a sampling inlet provided at the sampling region; and a sampling flowline in fluid connection with the sampling inlet for drawing fluid from the sampling region wherein the one or more packers consists of two packers.
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3. An apparatus for obtaining a fluid at a position within a wellbore that penetrates a subterranean formation, comprising:
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a body adapted to be disposed in the wellbore on a conveyance equipped with one or more expandable packers providing a sample region disposed between an upper cleanup zone and a lower cleanup zone when expanded into abutting contact with the wellbore wall; an upper cleanup port provided at the upper cleanup zone; a lower cleanup port provided at the lower cleanup zone; at least one fluid cleanup flowline in fluid connection with the upper and lower cleanup ports; a sampling inlet provided at the sampling region; and a sampling flowline in fluid connection with the sampling inlet for drawing fluid from the sampling region wherein the one or more packers comprises; an upper packer providing the upper cleanup zone; and a lower packer providing the lower cleanup zone, wherein the upper cleanup zone is disposed between an upper guard packer section and an upper sampling packer section of the upper packer; the lower cleanup zone is disposed between a lower guard packer section and a lower sampling packer section of the lower packer; and the sampling region is disposed between the upper and lower sampling packer regions.
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4. A formation fluid sampling tool for obtaining a fluid at a position within a wellbore that penetrates a subterranean formation, the tool comprising:
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a body adapted to be disposed in the wellbore on a conveyance; one or more expandable packers providing an upper guard interval and a lower guard interval, wherein both the upper guard interval and the lower guard interval are formed by at least two packers; a sampling region provided between the upper and lower guard intervals when the one or more expandable packers are expanded into abutting contact with the wellbore wall; and a sampling flowline in fluid communication with the sampling region for drawing the fluid from the sampling region wherein the one or more expandable packers consists of two packers. - View Dependent Claims (5, 6)
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7. A method for obtaining a fluid sample at a position in a wellbore that penetrates a subterranean formation, the method comprising:
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disposing a sampling tool equipped with a packer into the wellbore on a conveyance; expanding the packer to form a sampling region between an upper guard interval and a lower guard interval; drawing fluid from the upper and lower guard intervals; and drawing fluid from the sampling region wherein the packer comprises an upper packer and a lower packer. - View Dependent Claims (8)
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9. A method for obtaining a fluid sample at a position in a wellbore that penetrates a subterranean formation, the method comprising:
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disposing a sampling tool equipped with a packer into the wellbore on a conveyance; expanding the packer to form a sampling region between an upper guard interval and a lower guard interval; drawing fluid from the upper and lower guard intervals; and drawing fluid from the sampling region the upper guard interval comprises an upper cleanup zone formed between an upper guard packer section and an upper sampling packer section; the lower guard interval comprises a lower cleanup zone formed between a lower sample packer section and a lower guard packer section; and the sampling region is formed between the upper and the lower sampling packer sections wherein the packer comprises an upper and a lower packer. - View Dependent Claims (10)
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Specification