CN106746001A - A kind of powder-type polyacrylamide drag reduction water returns the recycling method of discharge opeing - Google Patents
A kind of powder-type polyacrylamide drag reduction water returns the recycling method of discharge opeing Download PDFInfo
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- CN106746001A CN106746001A CN201611225581.4A CN201611225581A CN106746001A CN 106746001 A CN106746001 A CN 106746001A CN 201611225581 A CN201611225581 A CN 201611225581A CN 106746001 A CN106746001 A CN 106746001A
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- drag reduction
- discharge opeing
- powder
- returns
- reduction water
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
Abstract
The invention discloses the recycling method that a kind of powder-type polyacrylamide drag reduction water returns discharge opeing, it comprises the following steps：(1) composite oxidant, composite flocculation agent are added in pending powder-type polyacrylamide drag reduction water returns discharge opeing carries out stair oxidation, flocculating setting treatment；(2) flocculation aid is added, and flco is carried out into filtration treatment；(3) bactericide, alkalinity regulator are added again；(4) polyacrylamide drag reduction concentrated liquid is prepared using clear water；(5) concentrate of preparation is returned into discharge opeing with the drag reduction water obtained by three-level sterilization neutralisation treatment to mix, obtains usable shale gas fracturing fluid.Present invention process is simple, processing cost is low, solve the problems, such as that powder-type polyacrylamide drag reduction water returns that discharge opeing suspension content is high, salinity influences on polyacrylamide drag reduction solvent swell, powder-type polyacrylamide drag reduction water low-cost processes are realized with recycling, energy-conserving and environment-protective, improve oil-gas field development economic benefit, it is adaptable to the application under the conditions of the various varying environments such as Plain, mountain region.
Description
Technical field
Returned the present invention relates to the processing method of fracturing outlet liquid, more particularly to a kind of powder-type polyacrylamide drag reduction water
The recycling method of discharge opeing.
Background technology
With the development of World Economics, countries in the world for the energy demand being continuously increased, and conventional gas and oil resource
Increasingly depleted, the in recent years exploitation of the unconventional petroleum resources with shale oil gas as representative has obtained significant progress, becomes
The new growth point of world energy supplies.
The exploitation of the unconventional petroleum resourceses such as shale gas is generally needed using large-scale horizontal well multistage subsection fracturing technique, because
And need using substantial amounts of fracturing fluid.Used fracturing fluid is broadly divided into aqueous fracturing fluid, oil base fracturing fluid and foam fracturing fluid
Deng, and aqueous fracturing fluid is because effect is good, low cost is fracturing fluid most commonly used at present.According to geological conditions not
Together, water-based fracturing liquid system is divided into drag reduction water (riverfrac treatment) system, linear colloid system and jelly system again.In opening for shale gas
During adopting, drag reduction aqueous systems because many shale gas reservoirs are all low permeability formations thus small to stratum injury effect are wide
It is general to use.
Have that fluid volume is big due to the fracturing developing process of shale gas reservoir, the characteristics of to return lifting rate big, it is resulting big
Amount fracturing waste liquor, complicated component, suspension and oil content be high, and variation water quality is big, difficult treatment, and environmental pollution is serious, into
Without one of avoidable technical bottleneck in being developed for current unconventional (oil) gas.
Application number CN105255475A, autograph《A kind of guanidine glue fracturing outlet liquid recycling method》, it is proposed that a kind of guanidine
Glue fracturing outlet liquid recycling method, after carrying out separation sand setting by will return discharge opeing, supplements a certain amount of bactericide, and addition is certain
The inorganic agent of amount, sequentially adds thickening agent, clay stabilizer, cleanup additive etc., can directly carry out preparing fracturing fluid, matches somebody with somebody pressure break
Liquid indices can reach oil well fracturing operation technical requirements.
The technical problem that above-mentioned patent is solved is by guanidine glue fracturing outlet liquid after desanding, to add a kind of inorganic agent, is solved
Guanidine glue fracturing outlet liquid is excessive due to high volence metal ion, after causing the guanidine repeated preparation of glue fracturing outlet liquid, it is difficult to meet existing
Field pressing crack construction requirement, it is difficult to the problem of re-using.But its shortcoming is as follows：(1) technology is mainly used in conventional oil gas well
Guar gum fracturing outlet liquid is reused, and is rarely applied to unconventionaloil pool field；(2) guar gum fracturing fluid returns lifting rate vs polypropylene
It is small that amide-type drag reduction water fracturing fluid returns lifting rate.
Application number CN104692564A, autograph《A kind of fracturing outlet liquid recycling method and processing unit》, it is proposed that
A kind of fracturing outlet liquid recycling method and processing unit, fracturing outlet liquid are returned from well head and ejected, and by gas-liquid separation, are sunk
Drop, desanding, oil removing, then by fracturing outlet liquid processing unit, online water treatment is carried out, it is heavy by ultraviolet sterilization, chemistry
Form sediment except PROCESS FOR TREATMENTs such as high volence metal ion, flocculation plus centrifugation oil removals, the liquid water quality after treatment is reached recycling
It is required that；Liquid after treatment enters fracturing fluid Agitation Tank；Water quality detection, the remaining additive concentration of analysis are carried out to liquid；Supplement
The additive of loss；Fracturing outlet liquid after treatment meets pressing crack construction when reusing.
The technical problem that above-mentioned patent is solved is to provide a kind of natural plant gum class fracturing outlet liquid recycling method and treatment
Device, with handling process is short, the connection of skid processing unit with convenient disassembly quickly, can real-time regulation inorganic agent consumption, to each
The features such as fracturing outlet liquid of type is applicable, the fracturing outlet liquid after treatment meets pressing crack construction requirement when reusing.
But its shortcoming is as follows：(1) technology be mainly used in gelled fracturing fluid return discharge opeing recycling, have no and be applied to polyacrylamide
Amine drag reduction water returns discharge opeing；(2) technology needs the flows such as addition demulsifier and ultraviolet sterilization, complex process, treatment week
Phase is long, it is difficult to meet the processing requirement of big liquid measure under Complex Mountain environment.
The content of the invention
The technical problems to be solved by the invention are that the deficiency existed for above-mentioned prior art provides a kind of powder-type
Polyacrylamide drag reduction water returns the recycling method of discharge opeing, and the method can improve operating efficiency, reduce processing cost.
The technical solution adopted in the present invention is：A kind of powder-type polyacrylamide drag reduction water returns the recycling of discharge opeing
Method, it is characterised in that：It comprises the following steps：
(1) stair oxidation flocculation：Composite oxygen is added in pending powder-type polyacrylamide drag reduction water returns discharge opeing
Agent, composite flocculation agent carry out stair oxidation, flocculating setting treatment, and stand 100-120min；
(2) two grades are helped solidifying filtering：Be disposed by stair oxidation flocculating setting return discharge opeing in add flocculation aid, it is quiet
80-110min is put, and flco is carried out into filtration treatment；
(3) three-level is sterilized neutralizes：Bactericide, alkalinity regulator are added in the drag reduction water by two stage treatment, by pH value
Adjust to 6.5-7.5；
(4) polyacrylamide drag reduction concentrated liquid is prepared using clear water；
(5) concentrate for obtaining step (4) returns discharge opeing and mixes with the drag reduction water obtained by three-level sterilization neutralisation treatment,
Obtain usable shale gas fracturing fluid.
By above-mentioned technical proposal：The composite oxidant be hypochlorite and persulfate, composite flocculation agent be ferro-aluminum without
Machine salt composite flocculation agent.
By above-mentioned technical proposal：The mass concentration of the hypochlorite is 40-50ppm, and the mass concentration of persulfate is
60-80ppm。
By above-mentioned technical proposal, the mass concentration of aluminium class inorganic salts is 30-80ppm, and the mass concentration of iron class inorganic salts is
40-60ppm。
By above-mentioned technical proposal, described flocculation aid is activation waterglass or activated silicic acid.
By above-mentioned technical proposal, the mass concentration of the flocculation aid is 5-8ppm.
By above-mentioned technical proposal, the bactericide is aldehydes or Methoxybenzyl chloride series bactericidal agent, and the aldehydes is glutaraldehyde,
Methoxybenzyl chloride series bactericidal agent is myristyl benzyl ammonium chloride or dodecyl benzyl dimethyl ammonium chloride.
By above-mentioned technical proposal, the mass concentration of aldehydes or Methoxybenzyl chloride series bactericidal agent is 75-100ppm, the basicity
Conditioning agent is sodium acid carbonate, and the mass concentration of alkalinity regulator is 2-4ppm.
The mass ratio of the polyacrylamide drag reduction concentrated liquid prepared by above-mentioned technical proposal, clear water is 0.1%-
0.3%；In step (2), using the polyacrylamide drag reduction concentrated liquid of clear water preparation and by three-level sterilization neutralisation treatment
The mixed proportion that the drag reduction water for obtaining returns discharge opeing is 1:4-1:1.
Having the beneficial effect that acquired by the present invention：Present invention process is simple, processing cost is low, solves powder-type polypropylene
Amide-type drag reduction water returns the problem that discharge opeing suspension content is high, salinity influences on polyacrylamide drag reduction solvent swell, realizes
Powder-type polyacrylamide drag reduction water low-cost processes and recycling, energy-conserving and environment-protective, improve gas field development economy effect
Benefit, it is adaptable to the application under the conditions of the various varying environments such as Plain, mountain region.
Brief description of the drawings
Fig. 1 is schematic flow sheet of the invention.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.
As shown in figure 1, present embodiments providing the pending pressure that discharge opeing is produced for Fuling Chongqing shale gas field platform 1 of returning
Split and return discharge opeing (using the fracturing outlet liquid 1000m produced by polyacrylamide drag reduction water fracturing fluid3), constituent such as table 1
It is shown.
The live drag reduction water of 1 platform of table 1 returns discharge opeing before processing water analysis
| Detection project | Testing result |
| Ca2+, Mg2+, mg/L | 184.7 |
| Total salinity, mg/L | 7458.6 |
| pH | 5.5 |
| Suspension, mg/L | 2421.6 |
| SRB bacterial contents, individual/mL | ≥2.5×105 |
| FB bacterial contents, individual/mL | ≥2.5×105 |
| TGB bacterial contents, individual/mL | 2.5×103 |
50ppm sodium hypochlorite and 75ppm potassium peroxydisulfates first are added in cesspool at the scene, 30ppm polyaluminiums are added
Aluminium and 40ppm ferrous sulfate, carry out stair oxidation flocculation treatment 110min, add 8ppm activation waterglass, stand 110min,
Filtered by solid particulate filter device, be eventually adding 100ppm dodecyl benzyl dimethyl ammonium chlorides and 3ppm carbonic acid
Hydrogen sodium, is sufficiently mixed uniformly, discharge opeing Analysis Results of Water Quality is returned after treatment as shown in table 2.
The live drag reduction water of 2 platform of table 1 returns water analysis after discharge opeing treatment
| Detection project | Testing result |
| Ca2+, Mg2+, mg/L | 150.4 |
| Total salinity, mg/L | 10245.1 |
| pH | 7 |
| Suspension, mg/L | 3.5 |
| SRB bacterial contents, individual/mL | 0 |
| FB bacterial contents, individual/mL | 0 |
| TGB bacterial contents, individual/mL | 0 |
The present embodiment use the powder-type polyacrylamide drag reduction water that above-mentioned treatment is obtained return the application process of discharge opeing for：
0.2% (wt) polyacrylamide drag reduction concentrated liquid is prepared using clear water, according to concentrate：Drag reduction water after treatment returns discharge opeing
=2:3 ratio, returns concentrate discharge opeing and mixes with drag reduction water after treatment, is directly used as the platform fracturing fluid.
Embodiment two：
Pending returns discharge opeing for the fracturing outlet liquid that Fuling Chongqing shale gas field platform 2 is produced (uses polyacrylamide
Fracturing outlet liquid 1000m produced by class drag reduction water fracturing fluid3), constituent is as shown in table 3.
The live drag reduction water of 3 platform of table 2 returns discharge opeing before processing water analysis
| Detection project | Testing result |
| Ca2+, Mg2+, mg/L | 246.3 |
| Total salinity, mg/L | 9069.06 |
| pH | 5 |
| Suspension, mg/L | 645.7 |
| SRB bacterial contents, individual/mL | ≥2.5×105 |
| FB bacterial contents, individual/mL | ≥2.5×105 |
| TGB bacterial contents, individual/mL | ≥2.5×105 |
First add 45ppm sodium hypochlorite and 60ppm potassium peroxydisulfates in cesspool at the scene, add 50ppm aluminum sulfate and
40ppm ferric trichlorides, carry out stair oxidation flocculation treatment 120min, add 6ppm activated silicic acids, stand 80min, by solid
Body particle filter is filtered, and is eventually adding 75ppm myristyls benzyl ammonium chloride and 4ppm sodium acid carbonates, is sufficiently mixed
Uniformly, discharge opeing Analysis Results of Water Quality is returned after treatment as shown in table 4.
The live drag reduction water of 4 platform of table 2 returns water analysis after discharge opeing treatment
| Detection project | Testing result |
| Ca2+, Mg2+, mg/L | 190.8 |
| Total salinity, mg/L | 12650.7 |
| pH | 7 |
| Suspension, mg/L | 5.5 |
| SRB bacterial contents, individual/mL | 0 |
| FB bacterial contents, individual/mL | 0 |
| TGB bacterial contents, individual/mL | 0 |
The present embodiment use the powder-type polyacrylamide drag reduction water that above-mentioned treatment is obtained return the application process of discharge opeing for：
0.2% (wt) polyacrylamide drag reduction concentrated liquid is prepared using clear water, according to concentrate：Drag reduction water after treatment returns discharge opeing
=1:1 ratio, returns concentrate discharge opeing and mixes with drag reduction water after treatment, is directly used as the platform fracturing fluid.
Embodiment three：
Pending returns discharge opeing for the fracturing outlet liquid that Fuling Chongqing shale gas field platform 3 is produced (uses polyacrylamide
Fracturing outlet liquid 1000m produced by class drag reduction water fracturing fluid3), constituent is as shown in table 5.
The live drag reduction water of 5 platform of table 3 returns discharge opeing before processing water analysis
| Detection project | Testing result |
| Ca2+, Mg2+, mg/L | 260.2 |
| Total salinity, mg/L | 9730.1 |
| pH | 6 |
| Suspension, mg/L | 824.3 |
| SRB bacterial contents, individual/mL | ≥2.5×105 |
| FB bacterial contents, individual/mL | ≥2.5×105 |
| TGB bacterial contents, individual/mL | 4.5×102 |
40ppm sodium hypochlorite and 80ppm sodium peroxydisulfates first are added in cesspool at the scene, 80ppm polyaluminiums are added
Aluminium and 60ppm ferric trichlorides, carry out stair oxidation flocculation treatment 100min, add 5ppm activated silicic acids, stand 90min, lead to
Cross solid particulate filter device to be filtered, be eventually adding 80ppm glutaraldehydes and 2ppm sodium acid carbonates, be sufficiently mixed uniform, place
Discharge opeing Analysis Results of Water Quality is returned after reason as shown in table 6.
The live drag reduction water of 6 platform of table 3 returns water analysis after discharge opeing treatment
| Detection project | Testing result |
| Ca2+, Mg2+, mg/L | 198.7 |
| Total salinity, mg/L | 14051.2 |
| pH | 7 |
| Suspension, mg/L | 7.2 |
| SRB bacterial contents, individual/mL | 0 |
| FB bacterial contents, individual/mL | 0 |
| TGB bacterial contents, individual/mL | 0 |
The present embodiment use the powder-type polyacrylamide drag reduction water that above-mentioned treatment is obtained return the application process of discharge opeing for：
0.2% (wt) polyacrylamide drag reduction concentrated liquid is prepared using clear water, according to concentrate：Drag reduction water after treatment returns discharge opeing
=1:3 ratio, returns concentrate discharge opeing and mixes with drag reduction water after treatment, is directly used as the platform fracturing fluid.
As described above, embodiments of the invention are explained, but as long as essentially without this hair of disengaging
Bright inventive point and effect can have many deformations, and this will be readily apparent to persons skilled in the art.Therefore, this
The variation of sample is also integrally incorporated within protection scope of the present invention.
Claims (9)
1. a kind of powder-type polyacrylamide drag reduction water returns the recycling method of discharge opeing, it is characterised in that：It includes as follows
Step：
(1) stair oxidation flocculation：In pending powder-type polyacrylamide drag reduction water returns discharge opeing add composite oxidant,
Composite flocculation agent carries out stair oxidation, flocculating setting treatment, and stands 100-120min；
(2) two grades are helped solidifying filtering：Flocculation aid is added in the drag reduction water being disposed by stair oxidation flocculating setting returns discharge opeing,
80-110min is stood, and flco is carried out into filtration treatment；
(3) three-level is sterilized neutralizes：Bactericide, alkalinity regulator are added in discharge opeing is returned by the drag reduction water of two stage treatment, by pH
Value is adjusted to 6.5-7.5；
(4) polyacrylamide drag reduction concentrated liquid is prepared using clear water；
(5) concentrate for obtaining step (4) returns discharge opeing and mixes with by the drag reduction water that obtains of three-level sterilization neutralisation treatment, obtains
Usable shale gas fracturing fluid.
2. powder-type polyacrylamide drag reduction water according to claim 1 returns the recycling method of discharge opeing, its feature
It is：The composite oxidant is hypochlorite and persulfate, and composite flocculation agent is ferro-aluminum inorganic salts composite flocculation agent.
3. powder-type polyacrylamide drag reduction water according to claim 2 returns the recycling method of discharge opeing, its feature
It is：The mass concentration of the hypochlorite is 40-50ppm, and the mass concentration of persulfate is 60-80ppm.
4. powder-type polyacrylamide drag reduction water according to claim 2 returns the recycling method of discharge opeing, its feature
It is：The mass concentration of aluminium class inorganic salts is 30-80ppm, and the mass concentration of iron class inorganic salts is 40-60ppm.
5. powder-type polyacrylamide drag reduction water according to claim 1 and 2 returns the recycling method of discharge opeing, and it is special
Levy and be：Described flocculation aid is activation waterglass or activated silicic acid.
6. powder-type polyacrylamide drag reduction water according to claim 5 returns the recycling method of discharge opeing, its feature
It is：The mass concentration of the flocculation aid is 5-8ppm.
7. powder-type polyacrylamide drag reduction water according to claim 1 and 2 returns the recycling method of discharge opeing, and it is special
Levy and be：The bactericide is aldehydes or Methoxybenzyl chloride series bactericidal agent, and the aldehydes is glutaraldehyde, and Benzylmagnesium chloride species are sterilized
Agent is myristyl benzyl ammonium chloride or dodecyl benzyl dimethyl ammonium chloride.
8. powder-type polyacrylamide drag reduction water according to claim 7 returns the recycling method of discharge opeing, its feature
It is：The mass concentration of aldehydes or Methoxybenzyl chloride series bactericidal agent is 75-100ppm, and the alkalinity regulator is sodium acid carbonate,
The mass concentration of alkalinity regulator is 2-4ppm.
9. powder-type polyacrylamide drag reduction water according to claim 1 returns the recycling method of discharge opeing, its feature
It is：The mass ratio of the polyacrylamide drag reduction concentrated liquid that clear water is prepared is 0.1%-0.3% in step (4)；Step
(5) in, using clear water the polyacrylamide drag reduction concentrated liquid prepared and the drag reduction obtained by three-level sterilization neutralisation treatment
The mixed proportion that water returns discharge opeing is 1:4-1:1.
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| CN201611225581.4A CN106746001A (en) | 2016-12-27 | 2016-12-27 | A kind of powder-type polyacrylamide drag reduction water returns the recycling method of discharge opeing |
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| CN201611225581.4A CN106746001A (en) | 2016-12-27 | 2016-12-27 | A kind of powder-type polyacrylamide drag reduction water returns the recycling method of discharge opeing |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110803799A (en) * | 2019-11-16 | 2020-02-18 | 湖南省波恩贝竹木科技有限公司 | Method for treating waste liquid from heat treatment of bamboo wood |
| CN112354264A (en) * | 2020-10-30 | 2021-02-12 | 中国矿业大学 | Energy-saving gas pump set combined transportation system used under complex gas extraction working condition and control method |
| CN112459748A (en) * | 2020-11-05 | 2021-03-09 | 中国石油天然气股份有限公司 | Single-point high-pressure gas lift drainage and gas increase process system and method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104310628A (en) * | 2014-08-22 | 2015-01-28 | 中国石油化工集团公司 | Reutilization method of water-base fracturing flowback fluid |
-
2016
- 2016-12-27 CN CN201611225581.4A patent/CN106746001A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104310628A (en) * | 2014-08-22 | 2015-01-28 | 中国石油化工集团公司 | Reutilization method of water-base fracturing flowback fluid |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110803799A (en) * | 2019-11-16 | 2020-02-18 | 湖南省波恩贝竹木科技有限公司 | Method for treating waste liquid from heat treatment of bamboo wood |
| CN112354264A (en) * | 2020-10-30 | 2021-02-12 | 中国矿业大学 | Energy-saving gas pump set combined transportation system used under complex gas extraction working condition and control method |
| CN112354264B (en) * | 2020-10-30 | 2021-09-03 | 中国矿业大学 | Energy-saving gas pump set combined transportation system used under complex gas extraction working condition and control method |
| CN112459748A (en) * | 2020-11-05 | 2021-03-09 | 中国石油天然气股份有限公司 | Single-point high-pressure gas lift drainage and gas increase process system and method |
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Effective date of registration: 20191230 Address after: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Applicant after: CHINA PETROLEUM & CHEMICAL Corp. Applicant after: PETROLEUM ENGINEERING TECHNOLOGY Research Institute OF HANJIANG OIL FIELD BRANCH SINOPEC Address before: 430035 Hubei city of Wuhan province Gutian two Road No. 37 HSBC Nanniwan Avenue headquarters block fifth B Applicant before: PETROLEUM ENGINEERING TECHNOLOGY Research Institute OF HANJIANG OIL FIELD BRANCH SINOPEC |
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