[미국특허]
CCUS SYSTEM FOR EXPLOITING THICKENED OIL RESERVOIRS BASED ON OPTIMAL FLUE GAS CO2 ENRICHMENT RATIO AND WORKING METHOD THEREOF
원문보기
IPC분류정보
국가/구분
United States(US) Patent
공개
국제특허분류(IPC7판)
E21B-043/16
E21B-043/40
출원번호
16331929
(2018-08-03)
공개번호
20210324716
(2021-10-21)
우선권정보
CN-201710877108.2 (2017-09-25)
국제출원번호
PCT/CN2018/098456
(2018-08-03)
발명자
/ 주소
ZHANG, Chao
LI, Zhaomin
LIU, Jianlin
ZHAO, Dongya
LU, Teng
WU, Shouya
GUO, Longjiang
출원인 / 주소
ZHANG, Chao
인용정보
피인용 횟수 :
0인용 특허 :
0
초록▼
A CCUS system for exploiting a thickened oil reservoir based on an optimal flue gas CO2 enrichment ratio. The CCUS system comprises a flue gas CO2 enrichment unit, a flue gas injection unit, a thickened oil thermal production well group unit and a produced gas recovery unit; the fuel gas CO2 enrichm
A CCUS system for exploiting a thickened oil reservoir based on an optimal flue gas CO2 enrichment ratio. The CCUS system comprises a flue gas CO2 enrichment unit, a flue gas injection unit, a thickened oil thermal production well group unit and a produced gas recovery unit; the fuel gas CO2 enrichment unit comprises an air separating enrichment unit and a boiler injection gas premixed tank; the air separating enrichment unit comprises an air separating primary device used for separating air into oxygen and nitrogen preliminarily, and an air separating secondary device used for further enriching a part of the oxygen which is subjected to the preliminary separation; and the boiler injection gas premixed tank is used for mixing the preliminarily separated nitrogen, the preliminarily separated part of the oxygen and/or the further enriched oxygen.
대표청구항▼
1. A CCUS system for exploiting a thickened oil reservoir based on an optimal flue gas CO2 enrichment ratio, characterized by comprising a flue gas CO2 enrichment unit, a flue gas injection unit, a thickened oil thermal production well group unit and a produced gas recovery unit; the fuel gas CO2 en
1. A CCUS system for exploiting a thickened oil reservoir based on an optimal flue gas CO2 enrichment ratio, characterized by comprising a flue gas CO2 enrichment unit, a flue gas injection unit, a thickened oil thermal production well group unit and a produced gas recovery unit; the fuel gas CO2 enrichment unit comprises an air separating enrichment unit and a boiler injection gas premixed tank;the air separating enrichment unit comprises an air separating primary device used for separating air into oxygen and nitrogen preliminarily; andan air separating secondary device used for further enriching a part of the oxygen which is subjected to the preliminary separation; andthe boiler injection gas premixed tank is used for mixing the preliminarily separated nitrogen, the preliminarily separated part of the oxygen and/or the further enriched oxygen. 2. The CCUS system for exploiting a thickened oil reservoir based on the optimal flue gas CO2 enrichment ratio of claim 1, wherein the air separating primary device comprises an air film separating primary device, a nitrogen-rich conveying pipeline, a first oxygen-rich conveying pipeline; the nitrogen-rich air conveying pipeline is connected with the nitrogen-rich gas pressurization monitoring tank; and the first oxygen-rich air conveying pipeline is connected with the oxygen-rich gas pressurization monitoring tank through a second oxygen-rich air conveying pipeline. 3. The CCUS system for exploiting a thickened oil reservoir based on the optimal flue gas CO2 enrichment ratio of claim 1, wherein the air separating secondary device comprises an air film separating secondary device; and the first oxygen-rich air conveying pipeline is connected with the oxygen-rich gas pressurization monitoring tank through a third oxygen-rich air conveying pipeline and the air film separating secondary device. 4. The CCUS system for exploiting a thickened oil reservoir based on the optimal flue gas CO2 enrichment ratio of claim 1, wherein the flue gas injection unit comprises a boiler connected with the boiler injection gas premixed tank through a boiler injection gas pressure stabilizer; and the flue gas outlet of the boiler is connected with the flue gas monitoring tank through the boiler flue gas conveying pipeline. 5. The CCUS system for exploiting a thickened oil reservoir based on the optimal flue gas CO2 enrichment ratio of claim 4, wherein the boiler flue gas conveying pipeline is provided with a flue gas dust remover, a flue gas dehumidifier, a flue gas desulfurization and denitrification device and a flue gas compressor. 6. The CCUS system for exploiting a thickened oil reservoir based on the optimal flue gas CO2 enrichment ratio of claim 1, wherein the thickened oil thermal production well group unit comprises a thermal production well group; the flue gas monitoring tank is connected with the thermal production well group through the thermal production well mouth injection device; and the boiler is connected with the thermal production well mouth injection device through a steam conveying pipeline. 7. The CCUS system for exploiting a thickened oil reservoir based on the optimal flue gas CO2 enrichment ratio of claim 1, wherein the produced gas recovery unit comprises a gas-liquid separation device connected with a thermal production well group; the gas-liquid separation device is also connected with a produced gas pressurization monitoring tank through a produced gas conveying pipeline; and the produced gas pressurization monitoring tank is connected with the boiler injection gas premixed tank. 8. The CCUS system for exploiting a thickened oil reservoir based on the optimal flue gas CO2 enrichment ratio of claim 7, wherein the produced gas conveying pipeline is provided with a produced gas purification device. 9. A working method of the CCUS system of claim 1, characterized by comprising steps below: 1) nitrogen and oxygen separation of air and premixing according to needed proportionwhen the oxygen concentration needed by the boiler is within 20% to 60%, only putting the air film primary device into use; performing primary separation on the nitrogen and the oxygen in the air by utilizing the air film separating primary device; conveying the nitrogen-rich gas after the separation to the nitrogen-rich gas pressurization monitoring tank through the nitrogen-rich air conveying pipeline; conveying the oxygen-rich gas after the separation to the oxygen-rich gas pressurization monitoring tank through the first oxygen-rich air conveying pipeline and the second oxygen-rich air conveying pipeline; arranging a first gas component monitoring module used for monitoring a nitrogen proportion at the nitrogen-rich gas pressurization monitoring tank and arranging a second gas component monitoring module used for monitoring an oxygen proportion at the oxygen-rich gas pressurization monitoring tank; adjusting a first gas mass flow meter and a second gas mass flow meter to separately control the flow of the nitrogen and that of the oxygen entering in the boiler injection gas premixed tank according to the needed oxygen concentration, and further checking whether the oxygen concentration of the boiler injection gas is at the needed concentration by a third gas component monitoring module;2) pressure adjustment of nitrogen and oxygen after premixing, injection, and combustion in the boilerstabilizing the boiler injection gas pressure by utilizing a boiler injection gas pressure stabilizer, conveying a nitrogen and oxygen premixed gas to the boiler hearth for combustion through the boiler injection gas conveying pipeline after the pressure needed by combustion in the boiler hearth is guaranteed;3) Monitoring, concentration adjustment, and injection-production of the flue gasenabling the flue gas caused by boiler combustion to enter the flue gas dust remover, the flue gas dehumidifier and the flue gas desulfurization and denitrification device through the boiler conveying pipeline; enabling the purified flue gas to enter the flue gas monitoring tank through the flue gas compressor; monitoring the flue gas CO2 enrichment ratio in the flue gas monitoring tank in real-time by the flue gas component monitoring module;if the flue gas CO2 enrichment ratio meets the optimal flue gas CO2 enrichment ratio, opening a first electromagnetic valve, and enabling the flue gas into the thermal production well group through the thermal production well mouth injection device for auxiliary oil production; andif the flue gas CO2 enrichment ratio does not meet the optimal flue gas CO2 enrichment ratio, closing the first electromagnetic valve and opening a second electromagnetic valve, injecting the flue gas back into the boiler injection gas premixed tank, adjusting the flue gas CO2 concentration by enabling the flue gas to participate in the secondary combustion of the boiler, and enabling the flue gas to enter the flue gas monitoring tank again for secondary analysis;4) Monitoring of produced liquid of the thermal production well groupconveying steam produced by the boiler to the thermal production well mouth injection device through the steam conveying pipeline and injecting the steam into the thermal production well group for thickened oil thermal production; performing gas-liquid separation on the produced liquid by the gas-liquid separation device in the thermal production process of the thermal production well group; enabling the obtained produced liquid to enter an oilfield manifold for oil-liquid separation; enabling the obtained produced gas to enter the produced gas purification device through the produced gas conveying pipeline to realize dehumidification and purification of the produced gas; enabling the produced gas after the purification to enter the produced gas pressurization monitoring tank, and monitoring the produced gas components by the produced gas component monitoring modules. 10. The working method of the CCUS system of claim 9, wherein, in Step 1), when the needed oxygen concentration of the boiler is within 60%400%, the air film separating secondary device is introduced while the air film separating primary device is put into use.
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