CN108386175A - A kind of super-viscous oil natural gas injection and the compound viscosity reducing process of thin oil - Google Patents
A kind of super-viscous oil natural gas injection and the compound viscosity reducing process of thin oil Download PDFInfo
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- CN108386175A CN108386175A CN201810268713.4A CN201810268713A CN108386175A CN 108386175 A CN108386175 A CN 108386175A CN 201810268713 A CN201810268713 A CN 201810268713A CN 108386175 A CN108386175 A CN 108386175A
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 202
- 239000003345 natural gas Substances 0.000 title claims abstract description 103
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000002347 injection Methods 0.000 title claims abstract description 28
- 239000007924 injection Substances 0.000 title claims abstract description 28
- 230000001603 reducing effect Effects 0.000 title claims abstract description 26
- 150000001875 compounds Chemical class 0.000 title claims abstract description 22
- 230000008569 process Effects 0.000 title claims abstract description 22
- 238000002156 mixing Methods 0.000 claims abstract description 68
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 239000000203 mixture Substances 0.000 claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 claims abstract description 17
- 239000003129 oil well Substances 0.000 claims abstract description 12
- 238000007872 degassing Methods 0.000 claims abstract description 7
- 238000000926 separation method Methods 0.000 claims abstract description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000010348 incorporation Methods 0.000 claims description 4
- 239000003921 oil Substances 0.000 description 131
- 230000009467 reduction Effects 0.000 description 12
- 238000003860 storage Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- 238000010790 dilution Methods 0.000 description 3
- 239000012895 dilution Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 238000007865 diluting Methods 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000010793 Steam injection (oil industry) Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
- E21B43/40—Separation associated with re-injection of separated materials
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The present invention provides a kind of super-viscous oil natural gas injections and the compound viscosity reducing process of thin oil, including：(1) natural gas is mixed to get natural gas thin oil mixture with thin oil in natural gas thin oil mixing line；(2) natural gas thin oil mixture enters oil casing annular space, is mixed with the super-viscous oil of reservoir output in oil well bottom, obtains mixing dilute mixed liquor；(3) it mixes dilute mixed liquor and is lifted to production wellhead in oil pipe, subsequently enter gas-liquid separator and carry out mixing dilute mixed liquor after gas-liquid separation is deaerated；(4) it is carried out dehydrating to mixing dilute mixed liquor after degassing.
Description
Technical field
The invention belongs to field of oilfield exploitation, in particular it relates to which a kind of super-viscous oil natural gas injection and thin oil are compound
Viscosity reducing process.
Background technology
China's ultradeep well heavy oil reserves are abundant, but it is big to exploit difficulty.Currently, developing many DP technologies both at home and abroad, such as
Exploitation via steam injection technique, blending diluting oil technology, heating, viscosity reducing technique and the reducing viscosity by emulsifying work for mixing efficient water soluble thinner
Skill etc..But due to regional difference, the technique that different oil field blocks use is also different.Chinese deep-layer heavy crude yield accounts for total yield
57% or so of amount, at present mainly based on blending diluting oil technology, but with the reduction of thin oil resource, thin oil blending visbreaking work
The development of skill is restricted, and there is an urgent need for a kind of thickened oil recovery techniques of high-efficiency and economic.Thick-oil emulsified adhesive-reducing, electrical heating viscosity reduction technology tool
Have the advantages that viscosity break ratio is high, improves pump efficiency, is easy to operate, but due to after breaking emulsion and dewatering and cooling viscosity recovery it is larger, it is difficult to it is full
Foot lifting, transportation integration, fail to obtain widespread adoption always.
Invention content
The goal of the invention of the present invention is in view of the drawbacks of the prior art, to provide a kind of super-viscous oil natural gas injection and thin oil is compound
Viscosity reducing process.
The present invention provides a kind of super-viscous oil natural gas injections and the compound viscosity reducing process of thin oil, including：(1) natural gas with mix it is dilute
Oil is mixed to get natural gas thin oil mixture in natural gas thin oil mixing line；(2) natural gas thin oil mixture enters oil jacket
Pipe annular space is mixed in oil well with the super-viscous oil of reservoir output, obtains mixing dilute mixed liquor；(3) dilute mixed liquor is mixed to exist
It is lifted to production wellhead in oil pipe, subsequently enters gas-liquid separator and carries out gas-liquid separation, is mixed after obtaining abjection natural gas and degassing
Dilute mixed liquor；(4) it is carried out dehydrating to mixing dilute mixed liquor after degassing.
Wherein, before step (1), the ratio of natural gas is first determined using following methods：Mixing light oil is inputted into oil jacket
Pipe annular space is mixed in oil well with the super-viscous oil of reservoir output, and the viscosity be blended into the mixed liquor of thin oil is
When 2000mPa.s to 3000mPa.s, the ratio of natural gas is calculated according to the mixed liquor amount of incorporation thin oil.
Wherein, the volume ratio for inputting the mixing light oil of oil casing annular space and the super-viscous oil of reservoir output is 0.8:1 to 3:
1。
Wherein, natural gas and to mix the volume ratio of dilute mixed liquor be 40:1 to 200:1.
Wherein, the abjection natural gas in step (3) is by abjection natural gas transmission pipeline return to step (1).
Wherein, it is 0.87g/cm that the mixing light oil, which is density,3To 0.91g/cm3Light oil.
Compared with the existing technology, super-viscous oil natural gas injection of the invention has following beneficial to effect with the compound viscosity reducing process of thin oil
Fruit：Super-viscous oil natural gas injection of the present invention and the compound viscosity reducing process of thin oil, by thin oil blending visbreaking, mix natural gas process Application of composite,
It is compound by three thin oil dilution viscosity reduction, natural gas dissolving viscosity reduction, natural gas gaslift mechanisms, it is equal to different viscosities super-viscous oil
With preferable viscosity reducing effect, meet super-viscous oil viscosity reducing demand.
Description of the drawings
Fig. 1 is the technological process skeleton diagram of super-viscous oil natural gas injection of the present invention and the compound viscosity reducing process of thin oil.In Fig. 1, respectively
Label is described as follows：
1- mix it is dilute with oil tank, 2- mix dilute injection pump, 3- mixing light oils pipeline, 4- natural gas storage tanks, 5- natural gas compressors,
6- ball-and-seats, 7- natural gas lines, 8- natural gas thin oils mixing line, 9- oil casing annular spaces, 10- oil pipes, 11- producing wells
Mouth, 12- mixed liquors external transport pipeline, 13- gas-liquid separators, 14- production fluids feed-line, 15- outputs liquid storage tank, 16- deviate from day
Right letter shoot line
Specific implementation mode
In order to fully understand the purpose of the present invention, feature and effect, by following specific implementation modes, the present invention is made detailed
It describes in detail bright.For the process of the present invention in addition to following the description, remaining is all made of the conventional method or device of this field.Unless otherwise
Illustrate, otherwise the term involved in the present invention all has the normally understood meaning of those skilled in the art.
The problem of for current super-viscous oil viscosity reduction process, the present invention provides a kind of super-viscous oil natural gas injection with it is dilute
The compound viscosity reducing process of oil.In general, viscous crude can be divided into common heavy oil, special thick oil and super-viscous oil according to viscosity and relative density, wherein
Super-viscous oil viscosity is more than 0.98 (130API) in 50000mPas or more, relative density.The present invention method specifically for be
Super-viscous oil, i.e. dynamic viscosity (50 DEG C) >=50000mPa.s, density (20 DEG C) ＞ 0.98g/cm3Crude oil.
With reference to Fig. 1 to a kind of preferred embodiment of super-viscous oil natural gas injection and the compound viscosity reducing process of thin oil of the present invention into
Row is described in detail.
The first step is 0.87g/cm mixing dilute with a certain amount of density is stored in oil tank 13To 0.91g/cm3Light oil
As mixing light oil, after mixing and being pressurized to 1MPa to 15MPa at dilute injection pump 2, it is mixed to enter natural gas thin oil via mixing light oil pipeline 3
Close pipeline 8；A certain amount of oil field is stored in natural gas storage tank 4 from producing natural gas, natural gas is via natural gas line 7, in day
After being pressurized to 1MPa to 15MPa at right air compressor 5, enter natural gas thin oil mixing line 8 by ball-and-seat 6；Mixing light oil with
Natural gas is mixed to get natural gas thin oil mixture in natural gas thin oil mixing line 8.
Inventors discovered through research that lightweight oil density is more than 0.91g/cm3After, it mixes dilute viscosity reducing effect and drastically declines；
Density is less than 0.87g/cm simultaneously3Light oil because oil property it is good, price is significantly increased, thus composite price and viscosity reduction effect
Two factors of fruit, preferably mixing light oil density are 0.87-0.91g/cm3。
It, can first respectively by mixing light oil and natural gas boosting to 1MPa to 15MPa before mixing light oil is mixed with natural gas
Natural gas and mixing light oil is set preferably to inject in oil well.
Second step, natural gas thin oil mixture enters oil casing annular space 9 by a wing of production wellhead 11, in oil well
Bottom is mixed with reservoir output super-viscous oil, obtains mixing dilute mixed liquor.
Third walks, and mixes dilute mixed liquor and is lifted to production wellhead 11 in oil pipe 10, is entered by mixed liquor external transport pipeline 12
Gas-liquid separator 13 carries out gas-liquid separation at gas-liquid separator 13, mixes dilute mixed liquor after obtaining abjection natural gas and degassing.Its
In, abjection natural gas enters abjection natural gas transmission pipeline 16, into natural gas storage tank 4, continues to mix gas as oil well, pass through
Recycling to natural gas can effectively reduce cost, reduce waste gases discharge.
4th step mixes dilute mixed liquor after degassing, pass in and out mixing liquid storage tank 15 by production fluid feed-line 14, dehydration is laggard
Row is outer defeated, you can realizes the viscosity reduction to super-viscous oil.
In the above-mentioned first step, the additional proportion of natural gas is by mixing mixing light oil into super-viscous oil, seeking stratum production
Amount continuouslys optimize the incorporation of mixing light oil and determination.Specific method is as follows：
1) it is 0.87g/cm mixing dilute with a certain amount of density is stored in oil tank 13To 0.91g/cm3Light oil conduct
Mixing light oil, mixing light oil after mixing and being pressurized to 1MPa to 15MPa at dilute injection pump 2, pass through production wellhead via mixing light oil pipeline 3
11 wing enters oil casing annular space 9, is mixed with reservoir output super-viscous oil in oil well bottom.Mix the mixing of thin oil
Liquid is lifted to production wellhead 11 in oil pipe 10, passes in and out mixing liquid storage tank 15 by mixed liquor external transport pipeline 12, is carried out after dehydration
It is outer defeated.
2) mixing light oil injection rate is reduced, step 1) is repeated, until the viscosity of the mixed liquor of the incorporation thin oil after optimization is
2000~3000mPa.s；Then, according under natural gas and mixed liquor contact position pressure condition, natural gas is full in mixed liquor
Natural gas is mixed to 1.5 times with 1 times of meltage, the saturation meltage under the pressure condition of contact position can be according to indoor conventional
Measuring obtains.
According to the above method, natural gas and the volume ratio for mixing dilute mixed liquor are 40:1 to 200:1, preferably 100:1 to
150:1, which is slightly larger than the saturation dissolved natural gas ratio of mixed liquor under the conditions of 15MPa, can play dissolving drop to greatest extent
Viscous effect, while abjection gas plays gas lift after tolerance more than needed and lifting decompression.
Super-viscous oil natural gas injection and the compound viscosity reducing process of thin oil of the present invention by thin oil blending visbreaking, is mixed natural gas process and is answered
Application is closed, it is compound by three thin oil dilution viscosity reduction, natural gas dissolving viscosity reduction, natural gas gaslift mechanisms, to different viscosities
Super-viscous oil all has preferable viscosity reducing effect, meets super-viscous oil viscosity reducing demand.First, thin oil dilutes viscosity reduction：Pass through dilution
Effect reduces gum asphalt concentration, weakens the interaction of super-viscous oil studies on asphaltene aggregation, meanwhile, by immixture,
It reduces super-viscous oil density and amplifies producing pressure differential.Secondly, natural gas dissolves viscosity reduction：Viscosity reducing effect is bright after the miscible natural gas of viscous crude
Aobvious, viscosity break ratio is up to 97% or more.Again, natural gas gas lift：When the energy of stratum supply is not enough to crude oil from shaft bottom
When giving rise to ground, oil well just goes dead, and natural gas is injected into well from casing annular space or oil pipe, reduces well fluid
Proportion makes the pressure of borehole fluid column be less than the formation pressure reduced, to which fluid is led from oil pipe or casing annular space
Go out outside well.
Embodiment
It is further illustrated the present invention below by the mode of embodiment, but does not therefore limit the present invention to the reality
It applies among a range.In the following examples, the experimental methods for specific conditions are not specified, according to conventional methods and conditions, or according to quotient
Product specification selects.
Embodiment
It is further illustrated the present invention below by the mode of embodiment, but does not therefore limit the present invention to the reality
It applies among a range.In the following examples, the experimental methods for specific conditions are not specified, according to conventional methods and conditions, or according to quotient
Product specification selects.
Embodiment 1 (Confidential experimental)
TH1111 wells, 356282mPa.s/50 DEG C of original viscosity use annular space mixing light oil technique productions before implementing, day mix dilute
52 tons of oil produces 35 tons of viscous crude, thin oil viscous crude volume ratio 1.49 daily:1, outer defeated viscosity 2043mPas.In March, 2017 implements the present invention
Natural gas injection and the compound viscosity reduction technique of thin oil, specifically：
It is 0.90g/cm mixing dilute with a certain amount of density is stored in oil tank 13Light oil as mixing light oil, it is dilute mixing
After being pressurized to 12.3MPa at injection pump 2, enter natural gas thin oil mixing line 8 via mixing light oil pipeline 3；In natural gas storage tank 4
From producing natural gas, natural gas is pressurized to via natural gas line 7 at natural gas compressor 5 in middle a certain amount of oil field of storage
After 13.5MPa, enter natural gas thin oil mixing line 8 by ball-and-seat 6；Mixing light oil is with natural gas in natural gas thin oil mixing tube
Natural gas thin oil mixture is mixed to get in line 8.Natural gas thin oil mixture enters tubing and casing by a wing of production wellhead 11
Annular space 9 is mixed with reservoir output super-viscous oil in oil well bottom, obtains mixing dilute mixed liquor, wherein natural gas with mix it is dilute
The volume ratio of mixed liquor is 105：1.It mixes dilute mixed liquor and is lifted to production wellhead 11 in oil pipe 10, pass through mixed liquor external transport pipeline
12 enter gas-liquid separator 13, and gas-liquid separation is carried out at gas-liquid separator 13, obtain abjection natural gas and are mixed after deaerating dilute mixed
Close liquid.Abjection natural gas enters abjection natural gas transmission pipeline 16, into natural gas storage tank 4, continues to mix gas as oil well.It is de-
Dilute mixed liquor is mixed after gas, mixing liquid storage tank 15 is passed in and out by production fluid feed-line 14, is carried out after dehydration outer defeated.
45 tons of mixing light oil of day, day natural gas injection 3600m after implementation3, produce 49 tons of viscous crude, thin oil viscous crude mass ratio 0.92 daily:
1, outer defeated viscosity 1852mPas, increase production 14 ton per day of viscous crude, and thin oil dosage reduces by 38.1%.
Embodiment 2 (Confidential experimental)
TH2222 wells, 85610mPa.s/50 DEG C of original viscosity use annular space mixing light oil technique productions before implementing, day mix dilute
66 tons of oil produces 54 tons of viscous crude, thin oil viscous crude volume ratio 1.22 daily:1, outer defeated viscosity 1846mPas.In May, 2017 implements the present invention
Natural gas injection and the compound viscosity reduction technique of thin oil, the specific method that the present embodiment uses is identical as the method that embodiment 1 uses, area
It is not only that mixing light oil is pressurized to 13.6MPa mixing at dilute injection pump 2, natural gas is pressurized at natural gas compressor 5
14.7MPa, natural gas and the volume ratio for mixing dilute mixed liquor are 153：1.
41 tons of mixing light oil of day, day natural gas injection 4800m after implementation3, produce 59 tons of viscous crude, thin oil viscous crude mass ratio 0.69 daily:
1, outer defeated viscosity 1764mPas, increase production 4 ton per day of viscous crude, and thin oil dosage reduces by 43.2%.
The above embodiment is a preferred embodiment of the present invention, but the embodiment of present aspect is not by above-described embodiment
Limitation, it is other it is any without departing from the spirit and principles of the present invention made by substitute, modification, combination, change, simplify
Deng should be equivalent substitute mode, be included within the scope of the present invention.
Claims (6)
1. a kind of super-viscous oil natural gas injection and the compound viscosity reducing process of thin oil, which is characterized in that including：
(1) natural gas is mixed to get natural gas thin oil mixture with mixing light oil in natural gas thin oil mixing line；
(2) natural gas thin oil mixture enters oil casing annular space, is mixed with the super-viscous oil of reservoir output in oil well,
It obtains mixing dilute mixed liquor；
(3) it mixes dilute mixed liquor and is lifted to production wellhead in oil pipe, subsequently enter gas-liquid separator and carry out gas-liquid separation, taken off
Dilute mixed liquor is mixed after going out natural gas and degassing；
(4) it is carried out dehydrating to mixing dilute mixed liquor after degassing.
2. super-viscous oil natural gas injection according to claim 1 and the compound viscosity reducing process of thin oil, which is characterized in that in step
(1) before, the ratio of natural gas is first determined using following methods：Mixing light oil is inputted into oil casing annular space, in oil well
It is mixed with the super-viscous oil of reservoir output, when the viscosity be blended into the mixed liquor of thin oil is 2000mPa.s to 3000mPa.s,
The ratio of natural gas is calculated according to the mixed liquor amount of incorporation thin oil.
3. super-viscous oil natural gas injection according to claim 2 and the compound viscosity reducing process of thin oil, which is characterized in that input oil jacket
The mixing light oil of pipe annular space and the volume ratio of the super-viscous oil of reservoir output are 0.8:1 to 3:1.
4. super-viscous oil natural gas injection according to claim 1 and the compound viscosity reducing process of thin oil, which is characterized in that natural gas with
The volume ratio for mixing dilute mixed liquor is 40:1 to 200:1.
5. super-viscous oil natural gas injection according to claim 1 and the compound viscosity reducing process of thin oil, which is characterized in that step (3)
In abjection natural gas by abjection natural gas transmission pipeline return to step (1).
6. super-viscous oil natural gas injection according to any one of claims 1 to 5 and the compound viscosity reducing process of thin oil, feature exist
In the mixing light oil is that density is 0.87g/cm3To 0.91g/cm3Light oil.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810268713.4A CN108386175A (en) | 2018-03-29 | 2018-03-29 | A kind of super-viscous oil natural gas injection and the compound viscosity reducing process of thin oil |
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| CN201810268713.4A CN108386175A (en) | 2018-03-29 | 2018-03-29 | A kind of super-viscous oil natural gas injection and the compound viscosity reducing process of thin oil |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114412427A (en) * | 2020-10-12 | 2022-04-29 | 北京星油科技有限公司 | Gas lift and production integrated oil and gas exploitation system |
| CN114427385A (en) * | 2020-09-22 | 2022-05-03 | 中国石油化工股份有限公司 | Gas lift oil production gas injection pressure system and method for reducing gas lift oil production gas injection pressure |
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| US20090071646A1 (en) * | 2005-01-11 | 2009-03-19 | Amp-Lift Group Llc | Apparatus for treating fluid streams |
| CN103032056A (en) * | 2012-12-13 | 2013-04-10 | 中国石油化工股份有限公司 | Method and device for reducing viscosity of shaft applicable to extremely-viscous oil recovery |
| CN103626914A (en) * | 2013-11-29 | 2014-03-12 | 中国石油天然气股份有限公司 | Pour point depression and viscosity reduction agent and preparation method thereof |
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2018
- 2018-03-29 CN CN201810268713.4A patent/CN108386175A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090071646A1 (en) * | 2005-01-11 | 2009-03-19 | Amp-Lift Group Llc | Apparatus for treating fluid streams |
| CN103032056A (en) * | 2012-12-13 | 2013-04-10 | 中国石油化工股份有限公司 | Method and device for reducing viscosity of shaft applicable to extremely-viscous oil recovery |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114427385A (en) * | 2020-09-22 | 2022-05-03 | 中国石油化工股份有限公司 | Gas lift oil production gas injection pressure system and method for reducing gas lift oil production gas injection pressure |
| CN114412427A (en) * | 2020-10-12 | 2022-04-29 | 北京星油科技有限公司 | Gas lift and production integrated oil and gas exploitation system |
| CN114412427B (en) * | 2020-10-12 | 2023-11-14 | 北京星油科技有限公司 | Gas lift and production integrated oil gas exploitation system |
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| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Shijie Inventor after: Fan Weidong Inventor after: Xing Yu Inventor after: Yang Zuguo Inventor after: Zhao Haiyang Inventor after: Wang Lei Inventor after: Gao Qiuying Inventor after: Ren Bo Inventor after: Liu Lei Inventor after: Cao Chang Inventor after: Cheng Zhongfu Inventor before: Yang Zuguo Inventor before: Xing Yu Inventor before: Zhao Haiyang Inventor before: Wang Lei Inventor before: Gao Qiuying Inventor before: Ren Bo Inventor before: Liu Lei Inventor before: Cao Chang Inventor before: Cheng Zhongfu Inventor before: Fan Weidong |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180810 |