Wellbores utilizing fiber optic-based sensors and operating devices
First Claim
1. A downhole injection evaluation system comprising:
- (a) at least one downhole fiber optic sensor permanently disposed a first well for sensing at least one parameter associated with injecting a fluid into a formation;
(b) at least one additional downhole fiber optic sensor in a second well, the at least one additional sensor operably connected to the at least one fiber optic sensor in the first well;
wherein said first well is one of (I) an injection well, and (II) a production well and the second well is the other of (I) an injection well, and (II) a production well.
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Abstract
This invention provides a method for controlling production operations using fiber optic devices. An optical fiber carrying fiber-optic sensors is deployed downhole to provide information about downhole conditions. Parameters related to the chemicals being used for surface treatments are measured in real time and on-line, and these measured parameters are used to control the dosage of chemicals into the surface treatment system. The information is also used to control downhole devices that may be a packer, choke, sliding sleeve, perforating device, flow control valve, completion device, an anchor or any other device. Provision is also made for control of secondary recovery operations online using the downhole sensors to monitor the reservoir conditions. The present invention also provides a method of generating motive power in a wellbore utilizing optical energy. This can be done directly or indirectly, e.g., by first producing electrical energy that is then converted to another form of energy.
150 Citations
28 Claims
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1. A downhole injection evaluation system comprising:
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(a) at least one downhole fiber optic sensor permanently disposed a first well for sensing at least one parameter associated with injecting a fluid into a formation; (b) at least one additional downhole fiber optic sensor in a second well, the at least one additional sensor operably connected to the at least one fiber optic sensor in the first well; wherein said first well is one of (I) an injection well, and (II) a production well and the second well is the other of (I) an injection well, and (II) a production well. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for controlling hydrocarbon production comprising:
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a) a production well; b) an injection well having a data link to said production well; c) at least one sensor located in either of said injection well and said production well, said at least one sensor being capable of sensing at least one parameter associated with an injection operation, said sensor being operably connected to a controller for controlling injection in the injection well.
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12. A method of producing hydrocarbons from a subterranean reservoir comprising:
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a) permanently installing at least one downhole fiber optic sensor in a first well; (b) operably connecting at least one fiber optic sensor in a second well to the at least one fiber optice sensor in the first well; wherein the first well is one of (I) an injection well, and (II) a production well and the second well is the other of (I) an injection well, and (II) a production well. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A downhole injection evaluation system comprising:
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a) at least one downhole fiber optic sensor permanently disposed a first well for sensing at least one parameter associated with injecting a fluid into a formation; and (b) at least one downhole acoustic signal generator whereby signals generated by said at least one signal generator interact with at least one of (I) a fluid front, and (II) a fracture and are received by said at least one downhole sensor. wherein said first well is selected from (III) an injection well, and (IV) a production well.
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Specification