Focused sampling of formation fluids
First Claim
1. An apparatus comprising:
- an expandable packer configured to be disposed in the wellbore on a conveyance and expandable to fluidly isolate sections of a wellbore;
an upper cleanup port configured to receive formation fluid into the apparatus;
a lower cleanup port configured to receive formation fluid into the apparatus;
a sampling inlet positioned between the upper cleanup port and the lower cleanup port and configured to receive formation fluid into the apparatus, wherein at least one of the upper cleanup port, the lower cleanup port and the sampling inlet is formed within a body of the expandable packer and further wherein a portion of the expandable packer fluidly separates either the upper cleanup port from the sampling inlet or the lower cleanup port from the sampling inlet.
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Accused Products
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 is provided at the upper cleanup zone. A lower cleanup port is provided at the lower cleanup zone. A fluid cleanup flowline in fluid connection with the upper and lower cleanup ports can be provided. A sampling inlet is provided at the sampling region, and a sampling flowline is in fluid connection with the sampling inlet for drawing fluid from the sampling region.
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Citations
18 Claims
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1. An apparatus comprising:
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an expandable packer configured to be disposed in the wellbore on a conveyance and expandable to fluidly isolate sections of a wellbore; an upper cleanup port configured to receive formation fluid into the apparatus; a lower cleanup port configured to receive formation fluid into the apparatus; a sampling inlet positioned between the upper cleanup port and the lower cleanup port and configured to receive formation fluid into the apparatus, wherein at least one of the upper cleanup port, the lower cleanup port and the sampling inlet is formed within a body of the expandable packer and further wherein a portion of the expandable packer fluidly separates either the upper cleanup port from the sampling inlet or the lower cleanup port from the sampling inlet. - View Dependent Claims (2, 3, 4, 5)
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6. 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 consists of one packer.
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7. A formation fluid sampling tool comprising:
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an expandable packer having a sampling region positioned within a body of the packer and between a first section of the packer and a second section of the packer, the sampling region comprising a sampling inlet in fluid communication with a reservoir if the packer is expanded and a cleanup port positioned a vertical distance above or below the sampling region and fluidly isolated from the sampling inlet by the first section or the second section of the packer, the cleanup port configured to receive fluid from the reservoir. - View Dependent Claims (8, 9, 10, 11)
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12. A 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 at least two of the upper guard interval, the lower guard interval and the sampling region are fluidly isolated from each other by one or more sections of the packer. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification