CN101644140A - CO* flooding single string multi-zone separate injection technical string - Google Patents
CO* flooding single string multi-zone separate injection technical string Download PDFInfo
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- CN101644140A CN101644140A CN200910072773A CN200910072773A CN101644140A CN 101644140 A CN101644140 A CN 101644140A CN 200910072773 A CN200910072773 A CN 200910072773A CN 200910072773 A CN200910072773 A CN 200910072773A CN 101644140 A CN101644140 A CN 101644140A
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- string
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- flooding
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Abstract
The invention relates to the technical field of oilfield tertiary oil recovery and belongs to a CO2 flooding single string multi-zone separate injection downhole technical string. The invention provides the technical string which can realize CO2 multi-zone separate injection under the condition of a set of injection pipe network on the ground and has good sealing effect and CO2 corrosion resistance. The technical string mainly comprises a regulator 3 for alternating injection, a packer 4 and an injection allocator 5, wherein, the lower end of an oil pipe 1 is sequentially connected with the regulator 3 for alternating injection, the packer 4 and the injection allocator 5, and a plurality of unit bodies which are formed by connecting the packer 4 and the injection allocator 5 are connectedbelow the injection allocator 5. The technical string is used for carrying out the downhole multi-zone separation injection and has the advantages of simple construction technology, low cost of the string, reliable sealing performance of the string, CO2 corrosion resistance and the like.
Description
Technical field:
The present invention relates to technical field of oilfield tertiary oil recovery, belong to a kind of CO
2Flooding single string multi dispensing down-hole process pipe string.
Background technology:
Daqing oil field CO
2Displacement of reservoir oil block injects the well down-hole and is fit to annotate CO
2The stratum 3-5 layer is arranged, injection mode is general the injection.Because there is permeability contrast in the stratum, causes some layer notes not entered, interlayer contradiction is outstanding, and injection efficiency is not high.And the injection string of field use is the individual layer injection string at present, can only realize that the individual well individual layer injects, and injection string also exists problems such as sealing effectiveness is poor, corrosion-resistant simultaneously, can not satisfy the production needs.
Summary of the invention:
The purpose of this invention is to provide under a kind of condition of injecting pipe network at ground one cover and realize CO
2Depositing, good sealing effect and anti-CO
2The CO of corrosion
2Flooding single string multi-zone separate injection technical string.
The present invention includes oil pipe, sleeve pipe, and oil pipe places in the sleeve pipe, it also comprises alternately injects adjuster, packer and injection allocation device, wherein the oil pipe lower end connects successively and alternately injects adjuster, packer, injection allocation device, injection allocation device below connects a plurality of cell cubes that are connected to form by packer and injection allocation device, and alternately injects between adjuster, packer and the injection allocation device and all connect by oil pipe.
Packer is a drillable Y443 type.Oil pipe is handled through the nickel plating phosphor coating.
Compared with the prior art the present invention has the following advantages:
One cover injects under the pipe network condition on ground, can realize CO
2The drive injection well depositing.And can realize down-hole gaseous state CO
2The allotment of the test of zonal flow rate, pressure and laminated distributor under well flow.Anti-CO
2Corrode and carry the Y443 packer of setting mechanism, the one-trip string construction can realize setting, giving up of multiple-string packer, and construction technology is simple, and the tubing string cost is low, and the tubing string sealing performance is reliable.
Description of drawings:
Fig. 1 is a structure diagram of the present invention.
The specific embodiment:
Shown in accompanying drawing, the present invention includes oil pipe 1, sleeve pipe 2, and oil pipe 1 places in the sleeve pipe 2, it also comprises alternately injects adjuster 3, packer 4 and injection allocation device 5, wherein oil pipe 1 lower end connects successively and alternately injects adjuster 3, packer 4, injection allocation device 5, injection allocation device 5 belows connect a plurality of cell cubes that are connected to form by packer 4 and injection allocation device 5, and alternately inject between adjuster 3, packer 4 and the injection allocation device 5 and all connect by oil pipe.
During site operation, when under this tubing string in the sleeve pipe behind the precalculated position, oil pipe 1 is suppressed to 15-20MPa, what packer 4 carried hydraulic pressure sets the system compresses packing element, one-trip string is finished setting of multiple-string packer 4, and injection allocation device 5 corresponding implanted layers, valve are realized the layering injection.When needing to adjust injection rate, adopt wire Launching and Bailing injection allocation blanking plug, change valve on ground.In the time of need carrying out zonal flow rate, pressure test, adopt wire Launching and Bailing injection allocation blanking plug, be lowered to the test blanking plug.In the time of need carrying out anti-cycle operation, suppress, alternately inject adjuster 3 and can be communicated with the oil jacket space from sleeve pipe.
Claims (3)
1, CO
2Flooding single string multi-zone separate injection technical string, it comprises oil pipe (1), sleeve pipe (2), and oil pipe (1) places in the sleeve pipe (2), it is characterized in that: it also comprises alternately injects adjuster (3), packer (4) and injection allocation device (5), wherein oil pipe (1) lower end connects successively and alternately injects adjuster (3), packer (4), injection allocation device (5), injection allocation device (5) below connects a plurality of cell cubes that are connected to form by packer (4) and injection allocation device (5), and alternately injects between adjuster (3), packer (4) and the injection allocation device (5) and all connect by oil pipe (1).
2, CO according to claim 1
2Flooding single string multi-zone separate injection technical string is characterized in that: packer (3) is a drillable Y443 type.
3, CO according to claim 1
2Flooding single string multi-zone separate injection technical string is characterized in that: oil pipe (1) is handled through the nickel plating phosphor coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910072773A CN101644140A (en) | 2009-08-28 | 2009-08-28 | CO* flooding single string multi-zone separate injection technical string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910072773A CN101644140A (en) | 2009-08-28 | 2009-08-28 | CO* flooding single string multi-zone separate injection technical string |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101644140A true CN101644140A (en) | 2010-02-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910072773A Pending CN101644140A (en) | 2009-08-28 | 2009-08-28 | CO* flooding single string multi-zone separate injection technical string |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101644140A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545264A (en) * | 2016-01-05 | 2016-05-04 | 沈阳华威石油机械制造有限公司 | Carbon dioxide wheel injection oil displacement single-tube double-layer injection process tubular column |
| CN105545272A (en) * | 2015-12-31 | 2016-05-04 | 中国石油天然气股份有限公司 | Oil extraction method for ultra-low permeability water-sensitive reservoir/compact reservoir |
| CN111119811A (en) * | 2019-12-25 | 2020-05-08 | 中国石油天然气股份有限公司 | Dual-medium dispenser, dispensing string, and method for operating dispensing string |
-
2009
- 2009-08-28 CN CN200910072773A patent/CN101644140A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545272A (en) * | 2015-12-31 | 2016-05-04 | 中国石油天然气股份有限公司 | Oil extraction method for ultra-low permeability water-sensitive reservoir/compact reservoir |
| CN105545264A (en) * | 2016-01-05 | 2016-05-04 | 沈阳华威石油机械制造有限公司 | Carbon dioxide wheel injection oil displacement single-tube double-layer injection process tubular column |
| CN105545264B (en) * | 2016-01-05 | 2018-02-13 | 沈阳华威石油机械制造有限公司 | A kind of carbon dioxide alternate water injection displacement of reservoir oil single-tube double-layer injection technology tubing string |
| CN111119811A (en) * | 2019-12-25 | 2020-05-08 | 中国石油天然气股份有限公司 | Dual-medium dispenser, dispensing string, and method for operating dispensing string |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C12 | Rejection of a patent application after its publication | ||
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Application publication date: 20100210 |