CN214719054U - Chemical cleaning device for water injection pipeline of oil field - Google Patents
Chemical cleaning device for water injection pipeline of oil field Download PDFInfo
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- CN214719054U CN214719054U CN202120039093.4U CN202120039093U CN214719054U CN 214719054 U CN214719054 U CN 214719054U CN 202120039093 U CN202120039093 U CN 202120039093U CN 214719054 U CN214719054 U CN 214719054U
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- tank
- gas
- pipeline
- liquid
- water injection
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- 238000004140 cleaning Methods 0.000 title claims abstract description 66
- 238000002347 injection Methods 0.000 title claims abstract description 26
- 239000007924 injection Substances 0.000 title claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 239000000126 substance Substances 0.000 title claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 81
- 239000002699 waste material Substances 0.000 claims abstract description 46
- 238000000926 separation method Methods 0.000 claims abstract description 24
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims abstract description 17
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 16
- 239000003112 inhibitor Substances 0.000 claims abstract description 15
- 239000004576 sand Substances 0.000 claims abstract description 12
- 239000003513 alkali Substances 0.000 claims abstract description 8
- 239000002332 oil field water Substances 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims 1
- 230000003472 neutralizing effect Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 18
- 239000011550 stock solution Substances 0.000 description 18
- 239000003814 drug Substances 0.000 description 15
- 238000000034 method Methods 0.000 description 14
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 12
- 229910052925 anhydrite Inorganic materials 0.000 description 12
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 11
- 238000005086 pumping Methods 0.000 description 9
- 238000002791 soaking Methods 0.000 description 9
- 238000006477 desulfuration reaction Methods 0.000 description 7
- 230000023556 desulfurization Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 6
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical group [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 229910052717 sulfur Inorganic materials 0.000 description 5
- 239000011593 sulfur Substances 0.000 description 5
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 238000007865 diluting Methods 0.000 description 4
- 238000004090 dissolution Methods 0.000 description 4
- 239000006260 foam Substances 0.000 description 4
- 239000010802 sludge Substances 0.000 description 4
- 239000004094 surface-active agent Substances 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 3
- 229910052918 calcium silicate Inorganic materials 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 3
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 3
- 125000005587 carbonate group Chemical group 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 239000003599 detergent Substances 0.000 description 2
- -1 modified imidazoline quaternary ammonium salt Chemical class 0.000 description 2
- 150000007524 organic acids Chemical class 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 238000009270 solid waste treatment Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 239000012670 alkaline solution Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 230000009323 psychological health Effects 0.000 description 1
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Abstract
The chemical cleaning device for water injection pipeline in oil field is used for cleaning water injection pipeline in oil field, and includes hydrogen sulfide treating unit, pipeline, neutralizing tank, gas-liquid separating tank, alkali cleaning tank, waste liquid tank, sand collecting tank and valves; the neutralization tank is respectively connected with the gas-liquid separation tank, the alkali cleaning tank and the waste liquid tank through pipelines, valves are respectively arranged on the pipelines connected with the neutralization tank, and a waste liquid tank inhibitor filling inlet is arranged at an inlet of the waste liquid tank; the gas-liquid separation tank is connected with the sand collecting tank through a pipeline, a valve is arranged on the pipeline connected with the gas-liquid separation tank, an inhibitor filling opening is formed in the sand collecting tank, and a cleaning liquid outflow pipeline is further connected to the gas-liquid separation tank.
Description
Technical Field
The utility model relates to an oil field is with water injection pipeline cleaning technique, especially oil field water injection pipeline chemical cleaning device.
Background
The water injection pipeline for the oil field can be scaled after a long time, and the analyzed scale components mainly comprise carbonate, sulfate, silicate, ferrous sulfide, ferric oxide and the like, the ferrous sulfide is mainly used near the pipe wall, the middle layer is calcium sulfate and silicate, and the outer layer is carbonate and argillaceous components. In order to solve these problems, a common treatment method is to wash with some alkaline solution, but the treatment effect is certain, but the treatment is not clean, the treated waste liquid flows out and pollutes the environment, and particularly if the hydrogen sulfide is not treated properly, the hydrogen sulfide flows into the atmosphere environment, and the physical and psychological health of people is directly influenced.
Disclosure of Invention
The utility model aims at providing a chemical cleaning device for an oil field water injection pipeline, which can be used for treating clean oil field water injection pipeline without environmental pollution, and overcomes the defects of other prior art, and the chemical cleaning device comprises a hydrogen sulfide treatment device, a pipeline, a neutralization tank, a gas-liquid separation tank, an alkali cleaning tank, a waste liquid tank, a sand collecting groove and a valve, wherein the hydrogen sulfide treatment device is respectively connected with the neutralization tank and the gas-liquid separation tank by the pipeline, and the connected pipeline is respectively provided with the valve; the neutralization tank is respectively connected with the gas-liquid separation tank, the alkali cleaning tank and the waste liquid tank through pipelines, valves are respectively arranged on the pipelines connected with the neutralization tank, and a waste liquid tank inhibitor filling inlet is arranged at an inlet of the waste liquid tank; the gas-liquid separation tank is connected with the sand collecting tank through a pipeline, a valve is arranged on the pipeline connected with the gas-liquid separation tank, an inhibitor filling opening is formed in the sand collecting tank, and a cleaning liquid outflow pipeline is further connected to the gas-liquid separation tank.
The chemical cleaning method for the oilfield water injection pipeline comprises five steps of scale dispensing, gradient cleaning, waste liquid treatment, waste residue treatment and elemental sulfur treatment.
The first step is to dispense the medicine, aiming at the extracted scale sample, the analyzed scale components mainly comprise carbonate, sulfate, silicate, ferrous sulfide, ferric oxide and the like, the ferrous sulfide is mainly used near the tube wall, the middle layer is calcium sulfate and silicate, and the outer layer is carbonate and argillaceous components. The detergent is prepared from 25-30% of organic acid, 60-65% of deionized water, less than or equal to 2% of modified imidazoline quaternary ammonium salt, less than or equal to 1% of modified isomeric alcohol ether, less than or equal to 1% of N-s-triazine, 2-3% of surfactant and 5-6% of industrial alcohol.
Because the outer layer scale is mainly carbonate, the medicine feeding concentration is high, and the speed is high, a large amount of CO can be generated2The gas makes the cleaning liquid form more foams at the outlet, which affects H2S desulfurization effect. Middle scale layer of CaSO4Mainly, the innermost layer scale is mainly FeS, so different agents are required to be configured for different scale layers to ensure the cleaning effect. The specific method comprises the following steps: 1. cleaning carbonate scales: diluting the medicament stock solution (the effective concentration is about 35%) prepared according to the test scheme according to the ratio of 1: 5-6, pumping the diluted medicament stock solution into a water injection pipeline at the speed of 10-15L/min for circulationDuring cleaning, the pH value of the outlet residual liquid needs to be detected, and when the pH value is lower than 2-3, the stock solution needs to be properly added. When the gas in the residual liquid at the outlet is only a trace of small bubbles, the cleaning of the carbonate scales is finished. 2. CaSO4Scale cleaning: diluting the stock solution according to the ratio of 1:2, pumping the diluted stock solution into a water injection pipeline, and adding CaSO4The carbonate scale contained in the scale reacts with the medicament to generate gas, the gas content at the outlet is observed, and when the outlet is basically not provided with gas, the original liquid is directly pumped to soak. During soaking, the pressure in the water injection pipeline is observed, when the pressure is increased by 0.5MPa compared with the initial pressure, the outlet is opened, and new stock solution is pumped in. This stage of cleaning and CaSO4The thickness and compactness of the scale are closely related, the time can be long, and the pipeline inlet and outlet need to be opened to observe the effect when necessary. CaSO4The acid concentration of the waste liquid generated by soaking and cleaning the scale is higher, and the waste liquid can be collected by a ton barrel and used for cleaning the pipeline next time. 3. Cleaning FeS scale: pumping the stock solution into a water injection pipeline for circulation, observing the gas content at the outlet, and soaking when the outlet is basically free of gas. During soaking, the pressure in the water injection pipeline is observed, and when the pressure is increased to 0.5MPa from the initial pressure, the outlet is opened, and the stock solution is pumped in. The waste liquid produced by the cleaning at this stage may contain more effective acid liquid, and can be collected by a ton barrel for the next initial cleaning of the pipeline.
And a second step of gradient cleaning: in the initial stage, the low-concentration and low-speed pesticide feeding is adopted, the gas generation amount is controlled, and the foam generation in the waste liquid is controlled, so that the stable operation of the desulfurization pry is ensured. Properly increasing the concentration of the medicament in the middle period, and adding a penetrating agent and a surfactant to increase the CaSO4The speed of scale dissolution. Further improving the concentration of the medicament in the later period and promoting the dissolution of FeS.
Step three, waste liquid treatment: when the pH of the liquid discharged in the cleaning process is less than 2, part of stock solution can be added for recycling, and the liquid can be regarded as waste liquid only when the pH is more than or equal to 2. H is added into the waste liquid2S inhibitor confirmed absence of H2And (4) storing the escaped S in a bucket, neutralizing the escaped S with NaOH until the pH is = 7-8 after the S is cleaned, and then pulling and transporting the escaped S to a sewage station for dumping.
Step four, waste residue treatment: the waste residue and sludge generated in the cleaning process may contain FeS and a small amount of H2S, FeS and residual medicament possiblyReaction to produce H2S, therefore, it is necessary to add H to the waste slag or sludge2S inhibitor, no H was confirmed2And S is transported to a solid waste treatment point appointed by the Party A for treatment after escaping.
Fifthly, elemental sulfur treatment: h in the exhaust gas2S is subjected to desulfurization prying treatment to generate water-containing elemental sulfur, the sulfur needs to be stored in a sealed container, and after cleaning is finished, the sulfur is uniformly pulled and transported to a solid waste recovery unit appointed by Party A for treatment.
Because the scale contains much FeS, H is available at any time in the cleaning process2S is generated, so that the whole process of outlet end waste liquid and waste gas in the cleaning process is controlled according to the operation of the sulfur-related high-risk environment, and all the waste gas enters the special H2S prying desulfurization treatment, adding H into waste liquid and waste residue2And S, inhibitor treatment is carried out, so that the safety and no risk of the cleaning process are ensured.
Drawings
FIG. 1 is a schematic diagram of a chemical cleaning device for a water injection pipeline in an oil field, wherein the chemical cleaning device comprises a hydrogen sulfide treatment device 1, a pipeline 3, a neutralization tank 4, a gas-liquid separation tank 5, an alkaline cleaning tank 6, a waste liquid tank 7, a sand collecting tank 8, a valve 9, a waste liquid tank inhibitor filling port 10, an inhibitor filling port 11 and a cleaning liquid outflow pipeline.
Detailed Description
Embodiment 1, the utility model discloses a hydrogen sulfide processing apparatus 1, pipeline 2, neutralization tank 3, gas-liquid separation tank 4, alkali cleaning tank 5, waste liquid jar 6, sand collecting tank 7, valve 8, hydrogen sulfide processing apparatus 1 is connected with neutralization tank 3, gas-liquid separation tank 4 respectively by pipeline 2, installs valve 8 on its pipeline 2 of connecting respectively; the neutralization tank 3 is respectively connected with the gas-liquid separation tank 4, the alkali cleaning tank 5 and the waste liquid tank 6 through pipelines, valves are respectively arranged on the pipelines connected with the neutralization tank, and a waste liquid tank inhibitor filling port 9 is arranged at an inlet of the waste liquid tank 6; the gas-liquid separation tank 4 is connected with the sand collecting tank 7 through a pipeline, a valve is arranged on the pipeline connected with the gas-liquid separation tank, an inhibitor filling opening 10 is arranged on the sand collecting tank 7, and a cleaning liquid outflow pipeline 11 is also connected to the gas-liquid separation tank 4.
The chemical cleaning method for the water injection pipeline of the oil field comprises five steps of scale dispensing, gradient cleaning, waste liquid treatment, waste residue treatment and elemental sulfur treatment.
Firstly, preparing a scale, aiming at an extracted scale sample, analyzing the scale components mainly comprising carbonate, sulfate, silicate, ferrous sulfide, ferric oxide and the like, mainly comprising ferrous sulfide close to a pipe wall, calcium sulfate and silicate in the middle layer and carbonate and argillaceous components in the outer layer; the detergent is prepared from 25-30% of organic acid, 60-65% of deionized water, less than or equal to 2% of modified imidazoline quaternary ammonium salt, less than or equal to 1% of modified isomeric alcohol ether, less than or equal to 1% of N-s-triazine, 2-3% of surfactant and 5-6% of industrial alcohol.
Because the outer layer scale is mainly carbonate, the medicine feeding concentration is high, and the speed is high, a large amount of CO can be generated2The gas makes the cleaning liquid form more foams at the outlet, which affects H2S, desulfurization effect; middle scale layer of CaSO4Mainly, the innermost layer of scale is mainly FeS, so different agents are required to be configured for different scale layers to ensure the cleaning effect; the specific method comprises the following steps: 1. cleaning carbonate scales: diluting a medicament stock solution (with effective concentration of about 35%) prepared according to a test scheme according to a ratio of 1: 5-6, pumping the diluted medicament stock solution into a water injection pipeline at a speed of 10-15L/min for circular cleaning, wherein the pH value of outlet residual liquid needs to be detected in the period, and the stock solution needs to be properly added when the pH value is lower than 2-3; when the gas in the outlet residual liquid only has trace small bubbles, the carbonate scale cleaning is finished; 2. CaSO4Scale cleaning: diluting the stock solution according to the ratio of 1:2, pumping the diluted stock solution into a water injection pipeline, and adding CaSO4Reacting carbonate scale contained in the scale with a medicament to generate gas, observing the gas content at an outlet, and directly pumping the stock solution for soaking when the gas is not basically at the outlet; during soaking, observing the pressure in the water injection pipeline, opening an outlet when the pressure is increased by 0.5MPa compared with the initial pressure, and pumping new stock solution; this stage of cleaning and CaSO4The thickness of the scale is closely related to the compactness, the time is possibly long, and the pipeline inlet and outlet are required to be opened to observe the effect when necessary; CaSO4The acid concentration of the waste liquid generated by soaking and cleaning the scales is higher, and the waste liquid can be collected by a ton barrel and used for cleaning the pipeline next time; 3. cleaning FeS scale: pumping the raw liquidCirculating in a water injection pipeline, observing the gas content at the outlet, and soaking when the outlet is basically free of gas; during soaking, observing the pressure in the water injection pipeline, opening an outlet when the pressure is increased to 0.5MPa from the initial pressure, and pumping the stock solution; the waste liquid produced by the cleaning at this stage may contain more effective acid liquid, and can be collected by a ton barrel for the next initial cleaning of the pipeline.
And a second step of gradient cleaning: in the initial stage, low-concentration and low-speed medicine feeding is adopted, the gas generation amount is controlled, and the foam generation in the waste liquid is controlled, so that the stable operation of the desulfurization pry is ensured; properly increasing the concentration of the medicament in the middle period, and adding a penetrating agent and a surfactant to increase the CaSO4The speed of scale dissolution; further improving the concentration of the medicament in the later period and promoting the dissolution of FeS.
Step three, waste liquid treatment: when the pH of the liquid discharged in the cleaning process is less than 2, part of stock solution can be added for recycling, and the liquid can be regarded as waste liquid only when the pH is more than or equal to 2; h is added into the waste liquid2S inhibitor confirmed absence of H2And (4) storing the escaped S in a bucket, neutralizing the escaped S with NaOH until the pH is = 7-8 after the S is cleaned, and then pulling and transporting the escaped S to a sewage station for dumping.
Step four, waste residue treatment: the waste residue and sludge generated in the cleaning process may contain FeS and a small amount of H2S, FeS may react with residual agent to produce H2S, therefore, it is necessary to add H to the waste slag or sludge2S inhibitor, no H was confirmed2And S is transported to a solid waste treatment point appointed by the Party A for treatment after escaping.
Fifthly, elemental sulfur treatment: h in the exhaust gas2S is subjected to desulfurization prying treatment to generate water-containing elemental sulfur, the sulfur needs to be stored in a sealed container, and after cleaning is finished, the sulfur is uniformly pulled and transported to a solid waste recovery unit appointed by Party A for treatment.
Claims (4)
1. Oil field water injection pipeline chemical cleaning device, it includes hydrogen sulfide processing apparatus (1), pipeline (2), neutralization tank (3), gas-liquid separation jar (4), alkali clear jar (5), waste liquid jar (6), collection husky groove (7), valve (8), washing liquid outflow pipeline (11), characterized by: the hydrogen sulfide treatment device (1) is respectively connected with the neutralization tank (3) and the gas-liquid separation tank (4) through pipelines (2), and valves (8) are respectively arranged on the pipelines (2) connected with the neutralization tank and the gas-liquid separation tank.
2. The chemical cleaning device for the water injection pipeline of the oil field according to claim 1, which is characterized in that: the neutralization tank (3) is respectively connected with the gas-liquid separation tank (4), the alkali cleaning tank (5) and the waste liquid tank (6) through pipelines, and valves are respectively arranged on the pipelines connected with the neutralization tank.
3. The chemical cleaning device for the water injection pipeline of the oil field according to claim 1, which is characterized in that: and an inhibitor filling port (9) of the waste liquid tank is arranged at the inlet of the waste liquid tank (6).
4. The chemical cleaning device for the water injection pipeline of the oil field according to claim 1, which is characterized in that: the gas-liquid separation tank (4) is connected with the sand collecting tank (7) through a pipeline, a valve is arranged on the pipeline connected with the gas-liquid separation tank, an inhibitor filling opening (10) is arranged on the sand collecting tank (7), and a cleaning liquid outflow pipeline (11) is further connected to the gas-liquid separation tank (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120039093.4U CN214719054U (en) | 2021-01-08 | 2021-01-08 | Chemical cleaning device for water injection pipeline of oil field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120039093.4U CN214719054U (en) | 2021-01-08 | 2021-01-08 | Chemical cleaning device for water injection pipeline of oil field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214719054U true CN214719054U (en) | 2021-11-16 |
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ID=78638086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120039093.4U Expired - Fee Related CN214719054U (en) | 2021-01-08 | 2021-01-08 | Chemical cleaning device for water injection pipeline of oil field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214719054U (en) |
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2021
- 2021-01-08 CN CN202120039093.4U patent/CN214719054U/en not_active Expired - Fee Related
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