CN102747993B - Liquid foaming agent injection method - Google Patents

Liquid foaming agent injection method Download PDF

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Publication number
CN102747993B
CN102747993B CN201210215258.4A CN201210215258A CN102747993B CN 102747993 B CN102747993 B CN 102747993B CN 201210215258 A CN201210215258 A CN 201210215258A CN 102747993 B CN102747993 B CN 102747993B
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China
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short circuit
frother
porous plate
foaming agent
packer
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CN201210215258.4A
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CN102747993A (en
Inventor
李宾飞
李兆敏
李松岩
刘红军
张新军
刘昊
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China University of Petroleum Beijing CUPB
China University of Petroleum UPC East China
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China University of Petroleum UPC East China
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Abstract

The invention relates to a liquid foaming agent injection method, belonging to the field of natural gas exploitation. The method comprises the following steps: (1) mounting a packer at a pipe shoe of an oil pipe to separate the oil sleeve annulus and the well bottom; (2) mounting a short coupling on the upper part of the packer, wherein the side surface of the short coupling is provided with a foaming agent channel which communicates the oil sleeve annulus with the lower part of the short coupling, and the lower part of the short coupling is connected with capillaries and communicated to an accumulated liquid on the middle lower part of the well bottom all along; (3) injecting the foaming agent from a well mouth oil sleeve annulus gate to the oil sleeve annulus, wherein the foaming agent resides and gathers at the oil sleeve annulus on the upper part of the packer, and enters the accumulated liquid through the foaming agent channel of the short coupling and the capillaries on the lower part; and (4) mixing natural gas and the foaming agent solution, wherein the mixture passes through a torsional porous plate at the center of the short coupling, enters the oil pipe on the upper part, and is finally discharged. The invention enhances the utilization ratio of the foaming agent, the mixing degree of the foaming agent with the well bottom accumulated liquid, and the foaming efficiency, reduces the use amount of capillaries, and lowers the cost.

Description

A kind of liquid blowing agents method for implanting
Technical field
The present invention relates to a kind of technology of gas recovery by foam drainage of natural gas extraction field, particularly a kind of liquid blowing agents method for implanting.
Background technology
In natural gas extraction, after having Gas Reservoirs water outlet, hydrops can be formed in shaft bottom gradually, have a strong impact on the production capacity of natural gas.Technology of gas recovery by foam drainage is by adding frother in the wellbore, makes natural gas and shaft bottom hydrops form foam, utilizes foam to be discharged by pit shaft hydrops, gas well is resumed production and extends campaign, thus reach the object improving gas reservoir ultimate recovery.Frother is generally that screen from existing commercially available frother, concrete grammar and standard can see petroleum industry standard SY/T 6465-2000 " foam drainage gas recovery frother evaluation methods " according to conditions such as gas well fluid properties and temperature.Frother is divided into solid-state frother and liquid blowing agents two type, and solid-state frother is generally directly dropped into by well head; The method for implanting of liquid blowing agents mainly contains 2 kinds: one is directly injected by frother from proof wellhead oil casing annular space or oil pipe, allows it mix with shaft bottom hydrops and natural gas phase thus to produce foam.The advantage of this method is: frother injects simple, does not need unnecessary uphole equipment, injects cost low; But shortcoming also clearly: frother generally arrives tubing shoe place and namely mixes with shaft bottom hydrops and produce foam and discharge, fully can not mix with shaft bottom hydrops, utilization rate is lower, there is certain requirement to gas well yield simultaneously, namely when output is too low, gas flow rate is slower, enough foams cannot be produced, produce foam efficiency lower.Another frother method for implanting is capillary tube injection method, and this method from well head, enters a capillary until shaft bottom, is injected into the hydrops of shaft bottom by frother from well head by capillary tube.The advantage of this method is: frother can be made well to be injected into shaft bottom thus better mix with shaft bottom hydrops, improves frother utilization rate and drainage effect; Its shortcoming is that capillary tube use amount is large, causes high cost.
Although therefore respectively have advantage to solve above-mentioned two kinds of injection methods, the shortcoming existed is also comparatively obvious, uses and is all subject to a definite limitation.
Summary of the invention
Object of the present invention is exactly in view of the foregoing defects the prior art has, a kind of liquid blowing agents method for implanting be suitable in gas well foam drainage gas recovery is provided, improve the mixability of the utilization rate of frother and itself and shaft bottom hydrops, improve bubbling efficiency, capillary tube use amount can also be reduced, reduced cost simultaneously.
A kind of liquid blowing agents method for implanting is realized by following methods:
(1) at the pipe shoe place of oil pipe, packer is installed, makes oil jacket annular space and shaft bottom phase packing;
(2) on packer top, a short circuit is installed, short circuit side has frother passage to be communicated with short circuit bottom by oil jacket annular space, short circuit bottom is provided with capillary interface, capillary tube is arranged on short circuit lower interface place and is communicated in the hydrops of middle and lower part, shaft bottom always, short circuit center is provided with torsional mode porous plate, and is communicated with oil pipe;
(3) drop into frother from frother inlet to oil jacket annular space, frother retains gathering at the oil jacket annular space place on packer top, enters in the hydrops in shaft bottom by the frother passage of short circuit and the capillary tube of bottom;
(4) natural gas of stratum output mixes with foaming agent solution, and through the torsional mode porous plate at short circuit center, gas-liquid fully mixes, and produces all even abundant foam, then enters top oil pipe, finally discharge.
Above-mentioned short circuit is made up of box screw thread, short circuit top connection, short circuit lower house, torsional mode porous plate shell, capillary interface, pin thread screw thread, frother passage, frother entrance, torsional mode porous plate, the upper and lower two ends of described short circuit are respectively equipped with box screw thread and pin thread screw thread, the bottom sides of short circuit lower house is provided with frother entrance and frother passage, and the bottom of frother passage is provided with capillary interface and can connects capillary tube; Short circuit inside is provided with torsional mode porous plate, and for improving bubbling efficiency, the top of torsional mode porous plate is communicated with oil pipe, and bottom can be communicated with shaft bottom through packer, and torsional mode porous plate is fixed by torsional mode porous plate shell.
The invention has the beneficial effects as follows: by middle and lower part at the bottom of direct for frother Injection Well, improve the utilization rate of frother and itself and the mixability of shaft bottom hydrops, improve bubbling efficiency, simultaneously minimizing capillary tube use amount, reduced cost.
Accompanying drawing explanation
Accompanying drawing 1 is tubular column structure schematic diagram of the present invention;
Accompanying drawing 2 is structure charts of short circuit of the present invention;
In upper figure: 1-frother inlet, 2-oil pipe, 3-sleeve pipe, 4-capillary tube, 5-packer, 6-short circuit, 7-oil jacket annular space, 8-stratum, 9-shaft bottom; 6.1-box screw thread, the top connection of 6.2-short circuit, 6.3-short circuit lower house, 6.4-torsional mode porous plate shell, 6.5-capillary interface, 6.6-pin thread screw thread, 6.7-frother passage, 6.8-frother entrance, 6.9-torsional mode porous plate.
Detailed description of the invention
By reference to the accompanying drawings 1 and Fig. 2, the invention will be further described:
A kind of liquid blowing agents method for implanting provided by the invention is realized by following methods:
(1) at the pipe shoe place of oil pipe 2, packer 5 is installed, makes oil jacket annular space 7 and shaft bottom 9 phase packing;
(2) on packer 5 top, a short circuit 6 is installed, short circuit side has frother passage to be communicated with short circuit bottom by oil jacket annular space, short circuit bottom is provided with capillary interface, capillary tube 4 is arranged on short circuit 6 lower interface place and is communicated in the hydrops of middle and lower part, shaft bottom 9 always, short circuit center is provided with torsional mode porous plate, and is communicated with oil pipe 2;
(3) from frother inlet 1(i.e. proof wellhead oil casing annular space gate) drop into frother to oil jacket annular space 7, frother retains gathering at oil jacket annular space 7 place on packer 5 top, enters in the hydrops in shaft bottom 9 by the frother passage of short circuit 6 and the capillary tube 4 of bottom;
(4) natural gas of stratum 8 output mixes with foaming agent solution, and through the torsional mode porous plate at short circuit 6 center, gas-liquid fully mixes, and produces all even abundant foam, then enters top oil pipe 2, finally discharge.
Above-mentioned short circuit is made up of box screw thread 6.1, short circuit top connection 6.2, short circuit lower house 6.3, torsional mode porous plate shell 6.4, capillary interface 6.5, pin thread screw thread 6.6, frother passage 6.7, frother entrance 6.8, torsional mode porous plate 6.9, the upper and lower two ends of described short circuit are respectively equipped with box screw thread 6.1 and pin thread screw thread 6.6, the bottom sides of short circuit lower house 6.3 is provided with frother entrance 6.8 and frother passage 6.7, and the bottom of frother passage 6.7 is provided with capillary interface 6.5 and can connects capillary tube; Described short circuit inside is provided with torsional mode porous plate 6.9, and it act as raising bubbling efficiency, and the top of torsional mode porous plate 6.9 is communicated with oil pipe, and bottom can be communicated with shaft bottom through packer, and torsional mode porous plate 6.9 is fixed by torsional mode porous plate shell 6.4.
Its course of work is as follows:
Install short circuit 6 in oil pipe 2 lower end, install packer 5 below short circuit, pit shaft below packing oil jacket annular space and oil pipe pipe shoe, capillary tube 4 is connected to the interface on short circuit 6, and one through in the hydrops of middle and lower part, shaft bottom.Existing commercially available liquid blowing agents injects from frother inlet 1, flow on packer 5 along the annular space between oil pipe 2 and sleeve pipe 3, be gathered in around short circuit 6, frother passage 6.7 is entered from frother entrance 6.8, through capillary interface 6.5, enter in the hydrops of middle and lower part, shaft bottom 9 along capillary tube 4, foaming agent solution is thoroughly mixed to form with hydrops, the natural gas of stratum 8 output and foaming agent solution, the foam producing evenly, enrich fully is mixed through torsional mode porous plate 6.9 gas-liquid, enter top oil pipe 2 again, finally discharge pit shaft.

Claims (1)

1. a liquid blowing agents method for implanting, is characterized in that being realized by following methods:
(1) at the pipe shoe place of oil pipe, packer is installed, makes oil jacket annular space and shaft bottom phase packing;
(2) on packer top, a short circuit is installed, short circuit side has frother passage to be communicated with short circuit bottom by oil jacket annular space, short circuit bottom is provided with capillary interface, capillary tube is arranged on short circuit lower interface place and is communicated in the hydrops of middle and lower part, shaft bottom always, short circuit center is provided with torsional mode porous plate, and is communicated with oil pipe;
(3) drop into frother from frother inlet to oil jacket annular space, frother retains gathering at the oil jacket annular space place on packer top, enters in the hydrops in shaft bottom by the frother passage of short circuit and the capillary tube of bottom;
(4) natural gas of stratum output mixes with foaming agent solution, and through the torsional mode porous plate at short circuit center, gas-liquid fully mixes, and produces all even abundant foam, then enters top oil pipe, finally discharge;
Above-mentioned short circuit is by box screw thread (6.1), short circuit top connection (6.2), short circuit lower house (6.3), torsional mode porous plate shell (6.4), capillary interface (6.5), pin thread screw thread (6.6), frother passage (6.7), frother entrance (6.8), torsional mode porous plate (6.9) forms, the upper and lower two ends of described short circuit are respectively equipped with box screw thread (6.1) and pin thread screw thread (6.6), the bottom sides of short circuit lower house (6.3) is provided with frother entrance (6.8) and frother passage (6.7), the bottom of frother passage (6.7) is provided with capillary interface (6.5) and can connects capillary tube, short circuit inside is provided with torsional mode porous plate (6.9), for improving bubbling efficiency, the top of torsional mode porous plate (6.9) is communicated with oil pipe, and bottom can be communicated with shaft bottom through packer, and torsional mode porous plate (6.9) is fixed by torsional mode porous plate shell (6.4),
During use, in oil pipe (2) lower end, short circuit (6) is installed, packer (5) is installed below short circuit, pit shaft below packing oil jacket annular space and oil pipe pipe shoe, capillary tube (4) is connected to the interface on short circuit (6), and one through in the hydrops of middle and lower part, shaft bottom, liquid blowing agents injects from frother inlet (1), flow on packer (5) along the annular space between oil pipe (2) and sleeve pipe (3), be gathered in short circuit (6) around, frother passage (6.7) is entered from frother entrance (6.8), through capillary interface (6.5), enter in the hydrops of shaft bottom (9) middle and lower part along capillary tube (4), foaming agent solution is thoroughly mixed to form with hydrops, the natural gas of stratum (8) output and foaming agent solution, generation foam is fully mixed through torsional mode porous plate (6.9) gas-liquid, enter top oil pipe (2) again, finally discharge pit shaft.
CN201210215258.4A 2012-06-27 2012-06-27 Liquid foaming agent injection method Active CN102747993B (en)

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104843621A (en) * 2015-03-26 2015-08-19 西南石油大学 Gas well oil jacket annular protecting fluid replacement device and method thereof
CN105443070B (en) * 2015-12-30 2018-08-14 中国石油天然气股份有限公司 A kind of packer with gas well foam discharging agent filling apparatus
CN106050199B (en) * 2016-07-29 2021-01-05 南充西南石油大学设计研究院有限责任公司 Comprehensive drainage gas production device and method
CN106050198B (en) * 2016-07-29 2021-01-29 南充西南石油大学设计研究院有限责任公司 Comprehensive drainage gas production system for low-pressure low-yield well
CN106499347B (en) * 2016-10-28 2018-11-16 中国石油天然气股份有限公司 A kind of application method of oil recovery flow string

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NL8600316A (en) * 1986-02-10 1987-09-01 Shell Int Research Injecting e.g. steam at selected level into oil-bearing formation - via tube string, injecting viscous foam in gravel packing outside perforated tube around string and placing seal on string above level
CN1648405A (en) * 2004-12-22 2005-08-03 西南石油学院 Injecting air boosting oil production and liquid discharging gas producing device and method
CN1890453A (en) * 2003-11-07 2007-01-03 国际壳牌研究有限公司 Method and system for injecting a treatment fluid into a well
CN201236686Y (en) * 2008-04-16 2009-05-13 大庆油田有限责任公司 Foam generator with adjustable pore space medium
CN102472089A (en) * 2009-06-29 2012-05-23 国际壳牌研究有限公司 System and method for intermittent gas lift

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Publication number Priority date Publication date Assignee Title
NL8600316A (en) * 1986-02-10 1987-09-01 Shell Int Research Injecting e.g. steam at selected level into oil-bearing formation - via tube string, injecting viscous foam in gravel packing outside perforated tube around string and placing seal on string above level
CN1890453A (en) * 2003-11-07 2007-01-03 国际壳牌研究有限公司 Method and system for injecting a treatment fluid into a well
CN1648405A (en) * 2004-12-22 2005-08-03 西南石油学院 Injecting air boosting oil production and liquid discharging gas producing device and method
CN201236686Y (en) * 2008-04-16 2009-05-13 大庆油田有限责任公司 Foam generator with adjustable pore space medium
CN102472089A (en) * 2009-06-29 2012-05-23 国际壳牌研究有限公司 System and method for intermittent gas lift

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SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
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EE01 Entry into force of recordation of patent licensing contract

Application publication date: 20121024

Assignee: DONGYING HEHUI PETROCHEMICAL TECHNOLOGY CO., LTD.

Assignor: China Petroleum University (East China)

Contract record no.: 2019370010014

Denomination of invention: Liquid foaming agent injection method

Granted publication date: 20150128

License type: Common License

Record date: 20190718

EE01 Entry into force of recordation of patent licensing contract