CN102102506A - Fire flooding oil extraction layered steam injection method and separate injection tubular column adopted by same - Google Patents
Fire flooding oil extraction layered steam injection method and separate injection tubular column adopted by same Download PDFInfo
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- CN102102506A CN102102506A CN201010599427XA CN201010599427A CN102102506A CN 102102506 A CN102102506 A CN 102102506A CN 201010599427X A CN201010599427X A CN 201010599427XA CN 201010599427 A CN201010599427 A CN 201010599427A CN 102102506 A CN102102506 A CN 102102506A
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Abstract
The invention belongs to the technical field of fire flooding oil extraction development of an oil field, and in particular relates to a fire flooding oil extraction layered steam injection method and a separate injection tubular column adopted by the same. The method comprises the following steps of: inserting an inner tubular column into an outer tubular column to form concentric tubular columns; and injecting air into an annular space of the outer tubular column and the inner tubular column to enter an upper stratum system during air injection of an injection well, and injecting the air through the inner tubular column to enter a lower stratum system. The separate injection tubular column comprises the outer tubular column and the inner tubular column, wherein the outer tubular column comprises an outer tube (1), a telescopic tube (2), an upper fire flooding packer (5), a perforated tube (6) with a large drift diameter, a short pump sleeve (8) and a lower fire flooding packer (9); the telescopic tube (2) is positioned on the middle upper part of the outer tube (1); and the inner tubular column comprises a small-diameter inner tube (3) and a long plunger (7) which is fixedly connected with the inner tube in a matching way. The invention solves the problems that the goals of displacement and raw oil viscosity reduction cannot be achieved due to general air injection and small air inflow of a low-permeability stratum existing in the prior art.
Description
Technical field
The invention belongs to oilfield fireflood oil recovery development technique field, the separate injection tubing string that relates in particular to a kind of fire flood layered gas-injection method and adopted.
Background technology
Fire flood is a kind of displacement crude oil production mode in the oilfield development process.Oilfield fireflood recovers the oil and generally adopts general air injection at present, but because the oil field mostly is the exploitation of multilayer system greatly, influenced by formation heterogeneity, there is interlayer difference, the air capacity of advancing that permeability is high is many, and permeability is low, and to advance air capacity few, and there is following shortcoming in said method: advance air capacity and can not satisfy the condition that fire flood guarantees the sufficient air capacity of burning that reaches less, do not reach the purpose of displacement and reduction viscosity of crude, and then influence the development effectiveness of fire flood.
Summary of the invention
The present invention is intended to overcome prior art and provides a kind of fire flood layered gas-injection method, this method to solve the general air injection that exists in the prior art, can not satisfy the demand of development scheme; It is few that air capacity is advanced on the stratum that permeability is low, can not satisfy to reach the condition that fire flood guarantees the sufficient air capacity of burning, do not reach displacement and reduce viscosity of crude, and then influence the problems such as development effectiveness of fire flood.In addition, the present invention also provides a kind of and the supporting separate injection tubing string of said method.
For achieving the above object, the present invention is achieved in that
Fire flood layered gas-injection method, it inserts interior tubing string in the outer tubing string, forms concentric tube column; Injecting the process that well injects air, the annular space injection air by described outer tubing string and interior tubing string enters series of strata, enters down series of strata by interior tubing string injection air.
The separate injection tubing string that above-mentioned fire flood layered gas-injection method is adopted, it comprises outer tubing string and interior tubing string;
Described outer tubing string comprises outer tube, telescoping tube, upward ported sub, the short pump block of fireflood packer, big latus rectum reach fireflood packer down; Described telescoping tube is positioned at the middle and upper part of outer tube; The ported sub of described telescoping tube, big latus rectum, short pump block, go up the fireflood packer and down the fireflood packer fixedly connect with outer tube respectively successively; The ported sub of described big latus rectum is between last fireflood packer and following fireflood packer;
Tubing string comprises that pipe reaches and its long-plunger that fixedly connects in the minor diameter in described; Described long-plunger enters within the short pump block, and with short pump block movingly.
As a kind of preferred version, the present invention can be provided with protection liquid in the top of fireflood packer on described.
The invention provides and a kind ofly can the annular space by outer tubing string, interior tubing string inject air and enter series of strata, enter down series of strata by interior tubing string injection air, it has not only solved the general air injection that exists in the prior art, can not satisfy the demand of development scheme; It is few that air capacity is advanced on the stratum that permeability is low, can not satisfy the condition that fire flood guarantees the sufficient air capacity of burning that reaches, do not reach the purpose of displacement and reduction viscosity of crude, and then influence the development effectiveness of fire flood, and realized in the engineering of air injection, according to actual conditions each series of strata being adjusted arbitrarily and being controlled, measures, for each series of strata fired state of meticulous adjustment has been created condition; In addition, protection liquid also can play the effect that reduces air injection pressure reduction, guarantees that packer has reliable sealing; Secondly, the present invention also can satisfy the requirement of fire flood steam injection preheating layering igniting, tubing string and interior tubing string outside when steam injection preheating layering is lighted a fire are owing to be heated, elongation in various degree takes place, at this moment, telescoping tube can be regulated the elongation of outer tubing string, and long-plunger can regulate with being free to slide of short pump block in the elongation of tubing string, in the process of layering air injection, outer tubing string and interior tubing string recover the state of air injection again.
Description of drawings
The invention will be further described below in conjunction with the drawings and specific embodiments.
Fig. 1 is the overall structure schematic diagram of separate injection tubing string of the present invention.
Among the figure: 1 is outer tube; 2 is telescoping tube; 3 is interior pipe; 4 are protection liquid; 5 is last fireflood packer; 6 is the ported sub of big latus rectum; 7 is long-plunger; 8 are short pump block; 9 are following fireflood packer.
The specific embodiment
Referring to shown in Figure 1, fire flood layered gas-injection method, it inserts interior tubing string in the outer tubing string, forms concentric tube column; Injecting the process that well injects air, the annular space injection air by described outer tubing string and interior tubing string enters series of strata, enters down series of strata by interior tubing string injection air.
The separate injection tubing string that above-mentioned fire flood layered gas-injection method is adopted, it comprises outer tubing string and interior tubing string;
Described outer tubing string comprises outer tube 1, telescoping tube 2, upward ported sub 6, the short pump block 8 of fireflood packer 5, big latus rectum reach fireflood packer 9 down; Described telescoping tube 2 is positioned at the middle and upper part of outer tube 1; The ported sub 6 of described telescoping tube 2, big latus rectum, short pump block 8, go up fireflood packer 5 and down fireflood packer 9 fixedly connect with outer tube 1 respectively successively; The ported sub 6 of described big latus rectum is between last fireflood packer 5 and following fireflood packer 9;
Tubing string comprises that pipe 3 reaches and its long-plunger that fixedly connects 7 in the minor diameter in described; Described long-plunger 7 enters within the short pump block 8, and with short pump block 8 movingly.The present invention top of fireflood packer 5 on described is provided with protection liquid 4.
In the specific implementation, the method of fire flood layering air injection of the present invention, insert in the outer tubing string by interior tubing string, the composition concentric tube column is realized, be to inject the process that well injects air, annular space injection air by outer tubing string, interior tubing string enters series of strata, injects air by interior tubing string and enters down series of strata; Outer tubing string is made up of outer tube 1, the telescoping tube 2 of large scale oil pipe, the ported sub 6 of going up fireflood packer 5, big latus rectum, short pump block 8 and following fireflood packer 9, outer tube 1, telescoping tube 2, last fireflood packer 5 connect by tubing round thread, telescoping tube 2 is positioned at the middle and upper part of outer tubing string, the ported sub 6 of big latus rectum, short pump block 8 and following fireflood packer 9 are connected by tubing round thread, and the interval between last fireflood packer 5 and the following fireflood packer 9 is definite according to the requirement of oil reservoir series of strata; Interior tubing string is made up of pipe 3 and long-plunger 7 in the minor diameter, and pipe 3 is connected with long-plunger 7 tubing round thread in the minor diameter, and long-plunger 7 enters in lacking pump block 8.
In Fig. 1, interior tubing string is made up of the interior pipe 3 of minor diameter and long-plunger 7; Short pump block 8 inner wall smooths, long-plunger 7 length slide up and down in short pump block 8, and form movable sealing, as long-plunger short pump barrel oil well pump greater than short pump block 8; Following fireflood packer 9 and outer tubing string will be gone up series of strata and following series of strata are kept apart, and guarantee not to be communicated with in the process of layered gas-injection; Last fireflood packer 5 will go up series of strata and its top well bore isolation comes, and pumps into and have protection liquid 4 heat insulation, anti-corrosion function; Long-plunger 7 enters in short pump block 8, guarantees slipper seal in gas injection process.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. a fire flood layered gas-injection method is characterized in that: interior tubing string is inserted in the outer tubing string, form concentric tube column; Injecting the process that well injects air, the annular space injection air by described outer tubing string and interior tubing string enters series of strata, enters down series of strata by interior tubing string injection air.
2. separate injection tubing string of being adopted of fire flood layered gas-injection method according to claim 1 is characterized in that: comprise outer tubing string and in tubing string; Described outer tubing string comprises outer tube (1), telescoping tube (2), upward ported sub (6), the short pump block (8) of fireflood packer (5), big latus rectum reach fireflood packer (9) down; Described telescoping tube (2) is positioned at the middle and upper part of outer tube (1); The ported sub (6) of described telescoping tube (2), big latus rectum, short pump block (8), go up fireflood packer (5) and down fireflood packer (9) fixedly connect with outer tube (1) respectively successively; The ported sub of described big latus rectum (6) is positioned between fireflood packer (5) and the following fireflood packer (9); Tubing string comprises that pipe (3) reaches and its long-plunger that fixedly connects (7) in the minor diameter in described; Described long-plunger (7) enters within the short pump block (8), and with short pump block (8) movingly.
3. the separate injection tubing string that is adopted according to the described fire flood layered gas-injection of claim 2 method is characterized in that: the top of fireflood packer (5) is provided with protection liquid (4) on described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010599427XA CN102102506A (en) | 2010-12-22 | 2010-12-22 | Fire flooding oil extraction layered steam injection method and separate injection tubular column adopted by same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010599427XA CN102102506A (en) | 2010-12-22 | 2010-12-22 | Fire flooding oil extraction layered steam injection method and separate injection tubular column adopted by same |
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| CN102102506A true CN102102506A (en) | 2011-06-22 |
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| CN201010599427XA Pending CN102102506A (en) | 2010-12-22 | 2010-12-22 | Fire flooding oil extraction layered steam injection method and separate injection tubular column adopted by same |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953319A (en) * | 2014-04-28 | 2014-07-30 | 中国石油天然气股份有限公司 | Concentric layered ignition gas injection pipe column and method |
| CN104329071A (en) * | 2014-10-29 | 2015-02-04 | 中国石油天然气股份有限公司 | In-situ combustion ignition method and device |
| CN104453821A (en) * | 2014-11-10 | 2015-03-25 | 中国石油天然气股份有限公司 | In-situ combustion layered ignition method |
| CN104481485A (en) * | 2014-11-10 | 2015-04-01 | 中国石油天然气股份有限公司 | Layered ignition device for in-situ combustion |
| CN104533366A (en) * | 2014-10-29 | 2015-04-22 | 中国石油天然气股份有限公司 | Profile control channeling sealing method and device in oil exploitation |
| CN105134143A (en) * | 2015-09-01 | 2015-12-09 | 中国石油天然气股份有限公司 | Injection well operation oil jacket shunt balance blowout prevention pipe column |
| CN105239982A (en) * | 2015-09-22 | 2016-01-13 | 中国石油天然气股份有限公司 | Method and device for determining air demand in-situ combustion process |
| CN105358831A (en) * | 2013-05-28 | 2016-02-24 | 利夫特克国际股份有限公司 | Downhole pumping apparatus and method |
| CN105937386A (en) * | 2016-06-28 | 2016-09-14 | 中国石油天然气股份有限公司 | Layered ignition process pipe column and layered ignition method thereof |
| CN107100553A (en) * | 2017-04-01 | 2017-08-29 | 中国石油天然气股份有限公司 | Anticorrosion process method and system |
| CN110552672A (en) * | 2019-09-10 | 2019-12-10 | 克拉玛依北腾石油工程技术服务有限公司 | Concentric tube multilayer steam injection system of steam injection well |
| CN111502625A (en) * | 2019-01-30 | 2020-08-07 | 中国石油天然气股份有限公司 | Layered fireflood chemical ignition concentric double-pipe column and mining method |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10066468B2 (en) | 2013-05-28 | 2018-09-04 | Lifteck International Inc. | Downhole pumping apparatus and method |
| CN105358831A (en) * | 2013-05-28 | 2016-02-24 | 利夫特克国际股份有限公司 | Downhole pumping apparatus and method |
| CN103953319A (en) * | 2014-04-28 | 2014-07-30 | 中国石油天然气股份有限公司 | Concentric layered ignition gas injection pipe column and method |
| CN104329071A (en) * | 2014-10-29 | 2015-02-04 | 中国石油天然气股份有限公司 | In-situ combustion ignition method and device |
| CN104533366A (en) * | 2014-10-29 | 2015-04-22 | 中国石油天然气股份有限公司 | Profile control channeling sealing method and device in oil exploitation |
| CN104329071B (en) * | 2014-10-29 | 2017-09-15 | 中国石油天然气股份有限公司 | In-situ combustion ignition method and device |
| CN104533366B (en) * | 2014-10-29 | 2017-01-11 | 中国石油天然气股份有限公司 | Profile control channeling sealing method and device in oil exploitation |
| CN104481485B (en) * | 2014-11-10 | 2017-02-01 | 中国石油天然气股份有限公司 | Layered ignition device for in-situ combustion |
| CN104453821A (en) * | 2014-11-10 | 2015-03-25 | 中国石油天然气股份有限公司 | In-situ combustion layered ignition method |
| CN104481485A (en) * | 2014-11-10 | 2015-04-01 | 中国石油天然气股份有限公司 | Layered ignition device for in-situ combustion |
| CN104453821B (en) * | 2014-11-10 | 2017-02-01 | 中国石油天然气股份有限公司 | In-situ combustion layered ignition method |
| CN105134143A (en) * | 2015-09-01 | 2015-12-09 | 中国石油天然气股份有限公司 | Injection well operation oil jacket shunt balance blowout prevention pipe column |
| CN105134143B (en) * | 2015-09-01 | 2017-07-25 | 中国石油天然气股份有限公司 | Injection well operation oil jacket shunt balance blowout prevention pipe column |
| CN105239982B (en) * | 2015-09-22 | 2017-10-17 | 中国石油天然气股份有限公司 | Method and device for determining air demand in-situ combustion process |
| CN105239982A (en) * | 2015-09-22 | 2016-01-13 | 中国石油天然气股份有限公司 | Method and device for determining air demand in-situ combustion process |
| CN105937386A (en) * | 2016-06-28 | 2016-09-14 | 中国石油天然气股份有限公司 | Layered ignition process pipe column and layered ignition method thereof |
| CN107100553A (en) * | 2017-04-01 | 2017-08-29 | 中国石油天然气股份有限公司 | Anticorrosion process method and system |
| CN111502625A (en) * | 2019-01-30 | 2020-08-07 | 中国石油天然气股份有限公司 | Layered fireflood chemical ignition concentric double-pipe column and mining method |
| CN111502625B (en) * | 2019-01-30 | 2022-07-05 | 中国石油天然气股份有限公司 | Layered fireflood chemical ignition concentric double-pipe column and mining method |
| CN110552672A (en) * | 2019-09-10 | 2019-12-10 | 克拉玛依北腾石油工程技术服务有限公司 | Concentric tube multilayer steam injection system of steam injection well |
| CN110552672B (en) * | 2019-09-10 | 2021-09-28 | 克拉玛依北腾石油工程技术服务有限公司 | Concentric tube multilayer steam injection system of steam injection well |
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Application publication date: 20110622 |