CN103333670B - A kind of for self generating gas system and using method thereof in the layer of plug removal in oil and water well energization - Google Patents
A kind of for self generating gas system and using method thereof in the layer of plug removal in oil and water well energization Download PDFInfo
- Publication number
- CN103333670B CN103333670B CN201210421553.5A CN201210421553A CN103333670B CN 103333670 B CN103333670 B CN 103333670B CN 201210421553 A CN201210421553 A CN 201210421553A CN 103333670 B CN103333670 B CN 103333670B
- Authority
- CN
- China
- Prior art keywords
- oil
- nitrite
- energization
- generating gas
- gas system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The present invention relates to a kind of for self generating gas system and using method thereof in the layer of plug removal in oil and water well energization, angry system primarily of the urea of weight content 3 ~ 10%, the nitrite of 5 ~ 25%, the activator of 5 ~ 25% and 40 ~ 85% water composition, nitrite is the one in Sodium Nitrite, ammonium nitrite and potassium nitrite; Activator is the one in methyl-formiate, thionamic acid ammonia, Mono Chloro Acetic Acid ammonia, hexamethylenetetramine, formaldehyde.During use, to mix under normal temperature and pressure and under injecting the oil-bearing formation of more than 50 DEG C, can de-plugging energization, improve tar productivity, this self generating gas system can be applicable to the low pressure low energy well de-plugging energization in the scattered reserve unit in oil field.
Description
Technical field
The present invention relates to a kind of composite formula improving plug removal in oil and water well energization effect, particularly relate to a kind of self generating gas system of the low pressure low energy well de-plugging energization be applied in the scattered reserve unit in oil field.
Background technology
In oil extraction in oil field technology, adopt a kind of self generating gas system to carry out the process of de-plugging energization to oil well, self generating gas system can improve stratum permeability, increase producing energy, adjust stratigraphic section and improve residual acid and return row and lead, reach the target improving petroleum production.
Conventional refers to from angry technology the compound system that one or both chemical compositions and multiple additives are formed, and after injecting stratum, under catalyzer or certain stratum temperature action, angry system is reacted and produces a large amount of CO
2and alkaline gas, increase producing energy, reduce oil water interfacial tension, reduce viscosity of crude, promote that row is returned in residual acid, this technology is applied more in tertiary oil recovery and acid fracturing, situ gas generating system common at present can be divided into four classes reaction mechanism: the first kind, one or both chemical agents are utilized to decompose under certain formation temperature or chemical reaction occurs, produce gas, the defect of this type of technology is the certain decomposition temperature of requirement, is generally greater than 90 DEG C, decomposition reaction is thermo-negative reaction, can cause stratum local cooling and produce cold damage.As " spontaneous CO
2technology of reservoir sweep and flooding efficiency research ", oil drilling technology, the 29th volume first phase in 2007, author adopts a kind of chemical agent to decompose in the earth formation and produces a large amount of CO
2, the condition of needs is high-temperature oil reservoir; " self generating gas composite foam profile control technique research and apply ", Xinjiang petroleum science and technology, the 17th volume the 4th phase in 2007, author utilizes two kinds of chemical agents to produce a large amount of gas at response of stratum, needs condition to be that temperature is greater than 150 DEG C and catalysts; Equations of The Second Kind, nitrite and ammonia salt is utilized to react under acidic medium katalysis, produce a large amount of gas, the defect of this type of technology is that angry system and acid solution can not mix on ground, need to adopt spacer pad, multistage plug injects, complicated construction technique, and angry liquid and acid solution exist the incomplete problem of reaction in the earth formation in addition.As " NaNO
2with NH
4cL reaction kinetics and the application in oil field thereof ", oil drilling technology, volume the 5th phase nineteen ninety-five the 17th, author adopts Sodium Nitrite and ammonium chloride solution to produce gas under the katalysis of acid and heat carries out de-plugging energization; USP4178993 utilizes Sodium Nitrite and ammonium chloride to react under certain temperature condition and produces a large amount of gas; CN101671553A utilizes Sodium Nitrite and whipping agent as A agent, and ammonium chloride, ethylenediamine tetraacetic acid (EDTA), acidic substance catalyzer and suds-stabilizing agent are made spherical as B agent, injects A, B agent during construction, and mixing produces gas under formation conditions; 3rd class, sulfonylurea, nitrite and acid are reacted under catalyst action, produce a large amount of gas and release amount of heat, the defect of this type of technology is that angry system and acid solution can not mix on ground, need to adopt spacer pad, multistage plug injects, complicated construction technique, as CN1693656A is mixed into A agent by hydrochloric acid, Glacial acetic acid and mutual solvent, urea and ammonium nitrate are mixed into B agent, a kind of molybdenum oxygenant that contains is as catalyzer, and onsite application first notes A agent, the mixed solution of B agent and catalyzer is injected with after clear water isolation again; CN101074366A is by carboxamide and low carbon mixed organic acid as A agent, and Sodium Nitrite, hypochlorous acid and sulfonate, as B agent, inject A, B agent respectively and enter response of stratum and produce a large amount of gas during onsite application; 4th class, carbonatite and supercarbonate and acid solution produce reacts, and generates CO
2gas, the defect of this type of technology is that amount of coalbed methane generated is less, complicated construction technique and speed of response too fast, as " the spontaneous CO of heavy crude reservoir
2send in and out desk research ", special reservoirs, volume the 6th phase December the 12nd in 2005, author adopts processable carbonate and supercarbonate, generates CO with low-concentration hcl effect
2gas.
Above-mentioned data shows, the self generating gas system of open report exists the problem of following several respects at present: the self generating gas system 1, relying on formation temperature generation decomposition reaction, as Na
2cO
3, NaHCO
3and NH
4hCO
3deng, can only be applied to high-temperature oil reservoir (being generally greater than 90 DEG C), amount of coalbed methane generated is few, and decomposition reaction is thermo-negative reaction in addition, can cause stratum local cooling and produce cold damage;
2, two or more chemical agent is needed to mix post-reacted self generating gas system on stratum, as Sodium Nitrite and ammonium chloride, Na
2cO
3with hydrochloric acid, urea+Sodium Nitrite and hydrochloric acid etc., can not mix on ground, need to adopt spacer pad to carry out the injection of multistage plug, complicated construction technique.
Summary of the invention
The object of this invention is to provide a kind of for self generating gas system in the layer of plug removal in oil and water well energization, the shortcoming of current conventional angry system or complicated construction technique few to reservoir temperature requirement high (being greater than 90 DEG C), amount of coalbed methane generated can be overcome, its reservoir temperature adaptability good (being greater than 50 DEG C), amount of coalbed methane generated are large, heat-dissipating amount is large, little and construction technology is simple to tube corrosion.
The object of the present invention is achieved like this: a kind of for self generating gas system in the layer of plug removal in oil and water well energization, comprises the component that weight content is following:
Urea 3 ~ 10%;
Nitrite 5 ~ 25%;
Activator 5 ~ 25%;
Water 40 ~ 85%;
Described nitrite is the one in Sodium Nitrite, ammonium nitrite and potassium nitrite;
Activator is the one in methyl-formiate, thionamic acid ammonia, Mono Chloro Acetic Acid ammonia, hexamethylenetetramine, formaldehyde.
As the preferred technical solution of the present invention, it comprises the following component of weight content:
Urea 3% ~ 10%;
Sodium Nitrite 7% ~ 24%;
Methyl-formiate 6% ~ 20%;
Water 46% ~ 84%.
When this self generating gas system uses, can carry out as follows:
1) each component is taken by the proportion relation of claim 1 or 2;
2) each component is mixed in Agitation Tank, carry out under normal temperature, normal pressure during mixing, fully stir and make each component Homogeneous phase mixing;
3), mixed solution is injected the oil-bearing formation of more than 50 DEG C by pipeline under, after vexed well 2-4 days, after in liquid to be mixed, each component is fully reacted, more normally recover the oil.
The present invention is primarily of urea (carbonyl diamine CO (NH
2)
2), nitrite, catalyzer and water composition, as long as it can react more than 50 DEG C, its reaction formula is as follows:
。
The most important improvement of the present invention is to have found a Class Activation agent, and activator is constantly hydrolyzed the sour environment provided needed for reaction, generates a large amount of gas, dissolves in crude oil, makes crude oil volumetric expansion; Meanwhile, the heat release of reaction can remove the organic plugging in stratum; Realize de-plugging energization, tar productivity 10 ~ 15% can be improved.Compared with prior art, beneficial effect of the present invention is:
1, the present invention can be applied to the de-plugging of oil well energization, water injection well increasing injection, is directly formulated in proportion (without sequencing) in Agitation Tank, and preparation required equipment is few, and technique is simple, saves engineering time and construction cost.
2, the present invention react under reservoir temperature (reservoir temperature is higher than 50 DEG C) produce a large amount of gas, increase the energy on stratum, generate the organic plugging in amount of heat releasing stratum, add villiaumite in system after, can acidizing effect be played, immediate vicinity of wellbore can be removed and pollute.
3, the present invention and pore forming material fit applications effect when well increasing injection is better, and the gas of generation mixes with pore forming material and produces a large amount of bubble, can play good profile control effect to heterogeneous reservoir.
4, the solution that is mixed with on ground of the present invention is for neutral, to injection pipeline and down-hole string corrosion-free.
This self generating gas system can be applicable to the low pressure low energy well de-plugging energization in the scattered reserve unit in oil field.
Embodiment
The laboratory experiment chemical urea of example 1-8, Sodium Nitrite, methyl-formiate, thionamic acid ammonia and hydrogen fluoride ammonia etc. are analytical pure, Shanghai Gong Shuo Bioisystech Co., Ltd, pore forming material (RD-05) is Industrial products, reaches Science and Technology Ltd. produce by Jiangsu Yang Zhourun.
Embodiment 1
For a self generating gas system in the layer of plug removal in oil and water well energization, comprise the component that weight content is following:
Urea 3%;
Sodium Nitrite 7%;
Methyl-formiate 6%;
Water 84%.
Prepare 100ml solution according to the above ratio during experiment, stir and solid is fully dissolved, be warming up to 50 DEG C, reaction generates a large amount of gas, and the aerogenesis time is 3.5h, and gas production rate is 940ml.
During onsite application, carry out as follows:
1) each component is taken by the proportion relation of the present embodiment;
2) each component is mixed in Agitation Tank, carry out under normal temperature, normal pressure during mixing, fully stir and make each component Homogeneous phase mixing;
3) under mixed solution single hop plug being injected the oil-bearing formation of more than 50 DEG C, closing well 2-4 days (adjust according to formation temperature, the formation temperature higher shut-in time shortens, and generally the shut-in time is greater than 48 hours), after in liquid to be mixed, each component is fully reacted, more normally recover the oil.
Embodiment 2
For a self generating gas system in the layer of plug removal in oil and water well energization, comprise the component that weight content is following:
Urea 5%;
Sodium Nitrite 12%;
Methyl-formiate 10%;
Water 73%.
Prepare 100ml solution according to the above ratio during experiment, stir and solid is fully dissolved, be warming up to 50 DEG C, reaction generates a large amount of gas, and the aerogenesis time is 5h, and gas production rate is 1560ml.
During use, identical with the step of embodiment 1.
Embodiment 3
For a self generating gas system in the layer of plug removal in oil and water well energization, it is made up of the component that weight content is following:
Urea 8%;
Sodium Nitrite 18%;
Methyl-formiate 20%;
Water 51%;
Villiaumite 3%.
Prepare 100ml solution according to the above ratio during experiment, stir and solid is fully dissolved, be warming up to 50 DEG C, reaction generates a large amount of gas, and the aerogenesis time is 6.5h, and gas production rate is 2250ml.
During use, identical with the step of embodiment 1.
Embodiment 4
For a self generating gas system in the layer of plug removal in oil and water well energization, comprise the component that weight content is following:
Urea 10%;
Sodium Nitrite 24%;
Methyl-formiate 20%;
Water 46%.
Prepare 100ml solution according to the above ratio during experiment, stir and solid is fully dissolved, be warming up to 50 DEG C, reaction generates a large amount of gas, and the aerogenesis time is 8h, and gas production rate is 2840ml.
During use, identical with the step of embodiment 1.
Embodiment 5
For a self generating gas system in the layer of plug removal in oil and water well energization, comprise the component that weight content is following:
Urea 3%;
Ammonium nitrite 7%;
Thionamic acid ammonia 8%;
Water 82%;
Prepare 100ml solution according to the above ratio during experiment, stir and solid is fully dissolved, be warming up to 50 DEG C, reaction generates a large amount of gas, and the aerogenesis time is 4h, and gas production rate is 820ml.
During use, identical with the step of embodiment 1.
Embodiment 6
For a self generating gas system in the layer of plug removal in oil and water well energization, comprise the component that weight content is following:
Urea 5%;
Ammonium nitrite 12%;
Thionamic acid ammonia 14%;
Water 69%;
Prepare 100ml solution according to the above ratio during experiment, stir and solid is fully dissolved, be warming up to 50 DEG C, reaction generates a large amount of gas, and the aerogenesis time is 5.5h, and gas production rate is 1280ml.
During use, identical with the step of embodiment 1.
Embodiment 7
For a self generating gas system in the layer of plug removal in oil and water well energization, comprise the component that weight content is following:
Urea 8%;
Ammonium nitrite 18%;
Thionamic acid ammonia 21%;
Water 52%;
Prepare 100ml solution according to the above ratio during experiment, stir and solid is fully dissolved, be warming up to 50 DEG C, reaction generates a large amount of gas, and the aerogenesis time is 6.5h, and gas production rate is 1850ml.
During use, identical with the step of embodiment 1.
Embodiment 8
For a self generating gas system in the layer of plug removal in oil and water well energization, comprise the component that weight content is following:
Urea 10%;
Ammonium nitrite 22%;
Thionamic acid ammonia 25%;
Water 38%;
Villiaumite 3%;
Pore forming material 2%.
Prepare 100ml solution according to the above ratio during experiment, stir and solid is fully dissolved, be warming up to 50 DEG C, reaction generates a large amount of gas, and the aerogenesis time is 8h, and gas production rate is 2370ml.
During use, identical with the step of embodiment 1.
The present invention is not limited to above-described embodiment, and its amount of urea can be 3 ~ 10%(weight content) between arbitrary value; Sodium Nitrite in above-described embodiment, ammonium nitrite also can be potassium nitrites, these three kinds of nitrate its one desirable, consumption is 5 ~ 25%(weight content), methyl-formiate, thionamic acid ammonia use as activator, activator can also be Mono Chloro Acetic Acid ammonia, hexamethylenetetramine or formaldehyde, the consumption of activator is 5 ~ 25%(weight content), the consumption of water is 40 ~ 85%(weight content), a small amount of villiaumite or pore forming material can also be added in this system.
Claims (3)
1., for a self generating gas system in the layer of plug removal in oil and water well energization, it is characterized in that comprising the following component of weight content:
Urea 3 ~ 10%;
Nitrite 5 ~ 25%;
Activator 5 ~ 25%;
Water 40 ~ 85%;
Described nitrite is the one in Sodium Nitrite, ammonium nitrite and potassium nitrite;
Activator is the one in methyl-formiate, thionamic acid ammonia, Mono Chloro Acetic Acid ammonia, hexamethylenetetramine, formaldehyde.
2. according to claim 1 a kind of for self generating gas system in the layer of plug removal in oil and water well energization, it is characterized in that comprising the following component of weight content:
Urea 3% ~ 10%;
Sodium Nitrite 7% ~ 24%;
Methyl-formiate 6% ~ 20%;
Water 46% ~ 84%.
3. a kind of using method for self generating gas system in the layer of plug removal in oil and water well energization according to claim 1 and 2, is characterized in that comprising the steps:
1) each component is taken by the proportion relation of claim 1 or 2;
2) each component is mixed in Agitation Tank, carry out under normal temperature, normal pressure during mixing, fully stir and make each component Homogeneous phase mixing;
3), mixed solution is injected the oil-bearing formation of more than 50 DEG C by pipeline under, inject from single hop or multistage during injection, after each component is fully reacted in liquid to be mixed, more normally recover the oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210421553.5A CN103333670B (en) | 2012-10-30 | 2012-10-30 | A kind of for self generating gas system and using method thereof in the layer of plug removal in oil and water well energization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210421553.5A CN103333670B (en) | 2012-10-30 | 2012-10-30 | A kind of for self generating gas system and using method thereof in the layer of plug removal in oil and water well energization |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103333670A CN103333670A (en) | 2013-10-02 |
| CN103333670B true CN103333670B (en) | 2015-11-18 |
Family
ID=49241877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210421553.5A Active CN103333670B (en) | 2012-10-30 | 2012-10-30 | A kind of for self generating gas system and using method thereof in the layer of plug removal in oil and water well energization |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103333670B (en) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104017556A (en) * | 2014-06-26 | 2014-09-03 | 中国石油大学(华东) | Self-heating foam system, and preparation method and application thereof |
| AR103391A1 (en) | 2015-01-13 | 2017-05-03 | Bp Corp North America Inc | METHODS AND SYSTEMS TO PRODUCE HYDROCARBONS FROM ROCA HYDROCARBON PRODUCER THROUGH THE COMBINED TREATMENT OF THE ROCK AND INJECTION OF BACK WATER |
| CN105838347B (en) * | 2016-04-01 | 2018-08-17 | 中国石油化工股份有限公司 | It is a kind of improve compact oil reservoir percolation ability angry system and its application |
| CN106111192B (en) * | 2016-06-28 | 2019-05-28 | 中国海洋石油集团有限公司 | A kind of composite catalyst system and a kind of reaction system and its application method |
| CN106350050B (en) * | 2016-07-29 | 2019-02-26 | 中国石油大学(华东) | Response regulatory method and its application based on the spontaneous hot system of sodium nitrite/ammonium chloride |
| CN106437649A (en) * | 2016-10-01 | 2017-02-22 | 中国石油化工股份有限公司 | Immoveable pipe column construction process using in-layer gas self-production and yield-increasing method |
| CN109678179A (en) * | 2018-12-21 | 2019-04-26 | 广东工业大学 | A method of automation carbamide ammonia |
| CN109958415A (en) * | 2019-04-18 | 2019-07-02 | 四川捷贝通能源科技有限公司 | A kind of recovery method of hyposmosis and ultra-low penetration heavy crude reservoir |
| CN110591685B (en) * | 2019-09-16 | 2022-05-10 | 西安石油大学 | In-situ self-generated microfoam steering acidizing fluid, acidizing steering method and application |
| CN111100624B (en) * | 2019-12-26 | 2022-04-26 | 中国石油大学(华东) | Low-corrosion self-gas-generation energy-increasing fracturing fluid and preparation method thereof |
| CN111808590B (en) * | 2020-08-12 | 2022-07-29 | 延安市永科石油工程技术服务有限公司 | Environment-friendly energy-increasing oil and water well blocking remover capable of rapidly reacting at normal temperature |
| CN112322270B (en) * | 2020-10-19 | 2023-01-24 | 中国石油大学(华东) | Continuous self-heating gas production system for oil field fracturing fluid and preparation method thereof |
| CN112175598A (en) * | 2020-11-04 | 2021-01-05 | 广汉市华星新技术开发研究所（普通合伙） | Non-oxidative polymer cracking agent |
| CN112761608B (en) * | 2021-02-08 | 2022-06-21 | 西南石油大学 | Method for improving shale oil recovery ratio and reducing fracturing fluid flowback in pressure flooding integrated mode |
| CN113107441B (en) * | 2021-05-12 | 2022-09-23 | 大庆辰平钻井技术服务有限公司 | Drainage-assisting and energy-increasing effect-improving method for open hole oil layer of ultra-short radius horizontal well |
| CN115703962B (en) * | 2021-08-16 | 2024-01-23 | 中国石油化工股份有限公司 | Blocking remover and construction method thereof |
| CN115785930A (en) * | 2022-11-10 | 2023-03-14 | 长江大学 | Self-generated foam wellbore cleaning agent and preparation method thereof |
| CN116064020A (en) * | 2022-11-29 | 2023-05-05 | 天津大港中邦石油工程技术服务有限公司 | Oil layer self-generating energy-increasing viscosity reducer and preparation method and application thereof |
| CN117343709B (en) * | 2023-12-05 | 2024-02-27 | 大庆金祥寓科技有限公司 | Non-explosive energy release blocking removal medicament and preparation method and application thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102391852A (en) * | 2011-08-19 | 2012-03-28 | 中国石油天然气股份有限公司 | Authigenic gas formulation for acidification of oil and gas wells |
-
2012
- 2012-10-30 CN CN201210421553.5A patent/CN103333670B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102391852A (en) * | 2011-08-19 | 2012-03-28 | 中国石油天然气股份有限公司 | Authigenic gas formulation for acidification of oil and gas wells |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103333670A (en) | 2013-10-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103333670B (en) | A kind of for self generating gas system and using method thereof in the layer of plug removal in oil and water well energization | |
| US9738824B2 (en) | Tight gas stimulation by in-situ nitrogen generation | |
| US10047277B2 (en) | Non-acidic exothermic sandstone stimulation fluids | |
| US20140338903A1 (en) | Method for enhanced oil recovery by in situ carbon dioxide generation | |
| CN108690595B (en) | Method for increasing energy and improving recovery ratio of self-generated foam of oil and gas well | |
| CN100497884C (en) | Method for producing oil by injecting air buffering catalytic oxidation of thick oil | |
| CN102643636B (en) | Auxiliary enhancement chemical agent for oil extraction with heat | |
| CN102391852B (en) | Authigenic gas formulation for acidification of oil and gas wells | |
| CN102899012A (en) | Self-born acid and preparation method and application thereof | |
| CN103711467A (en) | Formula for improving recovery ratio of authigenic CO2 | |
| US20140096958A1 (en) | Method, apparatus and composition to increase recovery of hydrocarbons by reaction of selective oxidizers and fuels in the subterranean environment | |
| CN108456511B (en) | In-layer generation of CO2System and use thereof | |
| CN112852398A (en) | High-temperature foam profile control agent for offshore heavy oil steam flooding and application thereof | |
| CN102392623B (en) | Air-drive oil production method for low-permeability reservoir | |
| CN105950126A (en) | Delaying controlled-release acid for acidizing unblocking, preparation method of acid and acidizing unblocking method | |
| CN103911139B (en) | Capsule parcel solid hydrochloric acid preparation method | |
| CN102838978B (en) | Preparation method and application of autogeneration gas foam composite oil-displacing agent under shaft | |
| CN102942911B (en) | Hydrogenation hot gas chemical yield increasing solution component applied to low-yield low-permeability oil well | |
| CN102936493B (en) | Hydrogenation thermochemical yield increase solution composition for low-permeability gas well | |
| US20180127637A1 (en) | Methods of enhancing oil recovery | |
| Zhao et al. | Research and advances of silicate plugging agent in the oilfields | |
| CN113337268A (en) | Fracturing and acidizing composite yield-increasing working solution and using method thereof | |
| CN105131924A (en) | Self-foaming flushing fluid tackifier, flushing fluid configuration reagent, and flushing fluid | |
| US20190085235A1 (en) | Methods of enhancing oil recovery | |
| CN114479797A (en) | Selective gel water plugging system for fracture-cavity oil reservoir and preparation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180716 Address after: Jiangsu province Yangzhou City Wenhui Road 225009 No. 1 Co-patentee after: Sinopec Corp. Patentee after: China Petroleum & Chemical Corporation Jiangsu Oilfield Branch Co-patentee after: Jiangsu oil field Mining Development Co., Ltd. Address before: 225009 No. 188, Weiyang Road, Yangzhou, Jiangsu Co-patentee before: Sinopec Corp. Patentee before: China Petroleum & Chemical Corporation Jiangsu Oilfield Branch |