CN102853634A - Method for recovering carbon dioxide - Google Patents
Method for recovering carbon dioxide Download PDFInfo
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- CN102853634A CN102853634A CN2012102880308A CN201210288030A CN102853634A CN 102853634 A CN102853634 A CN 102853634A CN 2012102880308 A CN2012102880308 A CN 2012102880308A CN 201210288030 A CN201210288030 A CN 201210288030A CN 102853634 A CN102853634 A CN 102853634A
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- ethane
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Abstract
The invention relates to a petroleum extraction technology, in particular to a method for recovering carbon dioxide in produced gas by driving in a petroleum extraction process. The method comprises the following steps of: (1) compressing, cooling and separating: cooling and separating a part of moisture and heavy hydrocarbons out through gas compression; (2) distilling de-oiled water to obtain CO2 gas of which the water content is less than or equal to 200ppm; (3) liquefying and stripping to obtain a finished CO2 liquid which meets an oil driving requirement; (4) and stripping at a low temperature for further recovering CO2 and concentrating methane, ethane and other organic matters. In the method, oilfield CO2 produced gas by driving is recovered by adopting rectifying and low-temperature stripping coupling methods, the flow is simple, and convenience is brought to operation; and as proved by practice, the CO2 yield is over 98 percent, the energy consumption is low, light oil and oilfield fuel gas are by-produced, byproducts have high economic values, and the method has a good application effect.
Description
Technical field
The present invention relates to the production technique of oil, specifically a kind of method that the carbon dioxide in the output gas reclaims of driving for the oil exploitation process is adopted.
Background technology
Along with the continuous intensification of exploitation degree, the oil field of China enters the exploitation middle and later periods in succession.In this stage, in order further to improve recovery ratio, each elephant all adopts the carbon dioxide flooding oil tech in research.At present the carbon dioxide flooding oil tech is at Daqing oil field, Jiangsu oilfield, and East China Bureau of Petroleum, northeast petroleum office, the oil units such as Xinjiang Oilfield are applied.Yet, after injecting carbon dioxide tolerance acquires a certain degree, oil well meeting output carbon dioxide sweep gas, the corresponding recovery technology of present domestic shortage causes the waste of source of the gas.Recovery method for carbon dioxide mainly contains amine absorption process and low temperature processing at present.Amine absorption process need be connected in series dewater unit, and operation is comparatively complicated, solvent corrosion, degraded, easily pollute, internal circulating load is large, energy consumption is higher, is unsuitable for the oil field and reclaims; The low temperature processing investment cost is large, careless manipulation, CO
2Easily solidify, energy consumption is higher.
Summary of the invention
Technical problem to be solved by this invention is, provides a kind of output gas that drives that can oil exploitation to reclaim, and reduces source of the gas waste, low, the easy to operate process for carbon dioxide recovery of energy consumption.
A kind of process for carbon dioxide recovery of the present invention may further comprise the steps:
(1) compression refrigerated separation
The CO that contains water, nitrogen, methane, ethane, C3～C12 alkane with the generation of oil well carbon dioxide drive
2Drive output gas for processing object, cool and isolate part moisture and heavy hydrocarbon through gas compression;
(2) distillation de-oiled water
Gas from step (1) passes through distillation, and boiling point is higher than CO
2Heavy hydrocarbon, water further separate, obtain the CO of moisture≤200 ppm
2Gas;
(3) liquefy and heat up in a steamer with carrying
CO from step (2)
2Gas obtains CO through condensation
2Liquid is carried and being heated up in a steamer, and reaches the separation boiling point and is lower than CO
2Nitrogen, methane, ethane and other trace impurity so that affect the N of displacement of reservoir oil mixed phase
2+ CH
4Molar fraction is met the finished product CO in the displacement of reservoir oil less than 1%
2Liquid;
(4) low temperature is carried and being heated up in a steamer
The CO with nitrogen, methane, ethane that distillation process in the step (2) is not condensed
2Tail gas carries out low temperature to be carried and heating up in a steamer, and adopts CO
2Condensate liquid is carried as low temperature and is heated up in a steamer the cat head coolant media, further reclaims CO
2And concentrated methane, ethane and other organic matter.
The present invention realizes reclaiming oil field CO by adopting rectifying and low temperature to carry the gold-plating coupled method
2Drive output gas, its flow process is simple, easy to operate, through actual verification, and CO
2Yield is up to more than 98%, and energy consumption is low, and by-product light oil and oil field gas, and the byproduct economic worth is high, has good effect.
The specific embodiment
This process for carbon dioxide recovery may further comprise the steps:
(1) compression refrigerated separation
The CO that contains water, nitrogen, methane, ethane, C3～C12 alkane with the generation of oil well carbon dioxide drive
2Drive output gas for processing object, cool and isolate part moisture and heavy hydrocarbon through gas compression;
(2) distillation de-oiled water
Gas from step (1) passes through distillation, and boiling point is higher than CO
2Heavy hydrocarbon, water further separate, obtain the CO of moisture≤200 ppm
2Gas;
(3) liquefy and heat up in a steamer with carrying
CO from step (2)
2Gas obtains CO through condensation
2Liquid is carried and being heated up in a steamer, and reaches the separation boiling point and is lower than CO
2Nitrogen, methane, ethane and other trace impurity so that affect the N of displacement of reservoir oil mixed phase
2+ CH
4Molar fraction is met the finished product CO in the displacement of reservoir oil less than 1%
2Liquid;
(4) low temperature is carried and being heated up in a steamer
The CO with nitrogen, methane, ethane that distillation process in the step (2) is not condensed
2Tail gas carries out low temperature to be carried and heating up in a steamer, and adopts CO
2Condensate liquid is carried as low temperature and is heated up in a steamer the cat head coolant media, further reclaims CO
2And concentrated methane, ethane and other organic matter.
Compression refrigerated separation condition in the step (1) is: the gas pressure after the compression is between 4.0～5.0 MPa.
Distillation de-oiled water condition in the step (2) is: 0～30 ℃ of temperature, pressure 4.0～5.0MPa.
Liquefaction in the step (3) with put forward the condition of heating up in a steamer and be: temperature-20～10 ℃, pressure 4.0～5.0MPa.
Low temperature in the step (4) is put forward the condition of heating up in a steamer: temperature-45～10 ℃, pressure 4.0～5.0MPa.
In the tail gas in the incoagulable gas methane, ethane concentration bring up to 60%, can directly send to the boiler room and make fuel and burn.Simultaneously, further recovery obtains displacement of reservoir oil CO
2Liquid end product heats up in a steamer tower CO with carrying
2Liquid end product converges, and delivers to pressure injection station CO
2Basin.Low temperature is carried and is heated up in a steamer cat head coolant media CO
2Be enriched in CO after the vaporization
2Tank top with CO
2Gas mix with displacement of reservoir oil output gas, enter next round and process, do not have disposal of pollutants to guarantee whole process.
The above embodiment of the present invention is applied to certain oil field, and effect is as follows:
1, carbon dioxide output
It is 883.17kg/hr that on-the-spot test gets carbon dioxide output, amounts to 21.2t/d;
2, product quality (S18)
Can find out from the chromatography result, the CO2 purity of recovery is 98.08%, is in very high purity level;
3, products C O2 yield
The yield of products C O2 can obtain with the amount of carbon dioxide and the device portal carbon dioxide ratio that reclaim product, is 92.83%:
4, ton product power consumption
According to field monitoring, can draw ton product power consumption and be about 120kWh.
5, condensate yield (S19)
According to the field measurement data, the condensate yield is 350.64kg/d (0.497m3/d); Amount to product condensate receipts amount 16.54kg per ton;
6, oil field gas yield (S14)
In addition, can also reclaim quite a few combustion gas, the field data demonstration, the combustion gas yield is about 72.85Nm3/hr, amounts to ton product 82.49 Nm3.
Claims (5)
1. process for carbon dioxide recovery is characterized in that: may further comprise the steps:
(1) compression refrigerated separation
The CO that contains water, nitrogen, methane, ethane, C3～C12 alkane with the generation of oil well carbon dioxide drive
2Drive output gas for processing object, cool and isolate part moisture and heavy hydrocarbon through gas compression;
(2) distillation de-oiled water
Gas from step (1) passes through distillation, and boiling point is higher than CO
2Heavy hydrocarbon, water further separate, obtain the CO of moisture≤200 ppm
2Gas;
(3) liquefy and heat up in a steamer with carrying
CO from step (2)
2Gas obtains CO through condensation
2Liquid is carried and being heated up in a steamer, and reaches the separation boiling point and is lower than CO
2Nitrogen, methane, ethane and other trace impurity so that affect the N of displacement of reservoir oil mixed phase
2+ CH
4Molar fraction is met the finished product CO in the displacement of reservoir oil less than 1%
2Liquid;
(4) low temperature is carried and being heated up in a steamer
The CO with nitrogen, methane, ethane that distillation process in the step (2) is not condensed
2Tail gas carries out low temperature to be carried and heating up in a steamer, and adopts CO
2Condensate liquid is carried as low temperature and is heated up in a steamer the cat head coolant media, further reclaims CO
2And concentrated methane, ethane and other organic matter.
2. process for carbon dioxide recovery according to claim 1, it is characterized in that: the compression refrigerated separation condition in the step (1) is: the gas pressure after the compression is at 4.0～5.0 MPa.
3. process for carbon dioxide recovery according to claim 1, it is characterized in that: the distillation de-oiled water condition in the step (2) is: 0～30 ℃ of temperature, pressure 4.0～5.0MPa.
4. process for carbon dioxide recovery according to claim 1 is characterized in that: the liquefaction in the step (3) with put forward the condition of heating up in a steamer and be: temperature-20～10 ℃, pressure 4.0～5.0MPa.
5. process for carbon dioxide recovery according to claim 1, it is characterized in that: the low temperature in the step (4) is put forward the condition of heating up in a steamer and is: temperature-45～10 ℃, pressure 4.0～5.0MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102880308A CN102853634A (en) | 2012-08-14 | 2012-08-14 | Method for recovering carbon dioxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102880308A CN102853634A (en) | 2012-08-14 | 2012-08-14 | Method for recovering carbon dioxide |
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|---|---|
| CN102853634A true CN102853634A (en) | 2013-01-02 |
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| CN2012102880308A Pending CN102853634A (en) | 2012-08-14 | 2012-08-14 | Method for recovering carbon dioxide |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104481472A (en) * | 2014-10-31 | 2015-04-01 | 中国石油化工股份有限公司 | CO2 flooding output gas separation and reinjection integrated method |
| CN104748506A (en) * | 2015-03-13 | 2015-07-01 | 河南心连心深冷能源股份有限公司 | Device for recycling CO2 from oil field mining assisting tail gas and process thereof |
| CN105502394A (en) * | 2015-12-17 | 2016-04-20 | 江苏华扬液碳有限责任公司 | Separation and purification system for preparing industrial liquid carbon dioxide from gas field carbon dioxide |
| CN111717915A (en) * | 2019-03-19 | 2020-09-29 | 中石化石油工程技术服务有限公司 | Method and device capable of improving capture rate of carbon dioxide in carbon dioxide flooding produced gas of oil field |
Citations (7)
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|---|---|---|---|---|
| US4460395A (en) * | 1983-01-18 | 1984-07-17 | The Pritchard Corporation | Method and apparatus for producing food grade carbon dioxide |
| US4695304A (en) * | 1984-06-14 | 1987-09-22 | Linde Aktiengesellschaft | Separation of CO2 from a gaseous mixture |
| US4762543A (en) * | 1987-03-19 | 1988-08-09 | Amoco Corporation | Carbon dioxide recovery |
| US20020117391A1 (en) * | 2001-01-31 | 2002-08-29 | Beam Craig A. | High purity CO2 and BTEX recovery |
| CN1152732C (en) * | 1999-05-07 | 2004-06-09 | 普莱克斯技术有限公司 | Purification method for increasing carbon dioxide recovery |
| CN201607093U (en) * | 2009-11-27 | 2010-10-13 | 北京高新利华催化材料制造有限公司 | Device for recovering liquefied carbon dioxide in petrochemical tail gas |
| CN202246075U (en) * | 2011-08-05 | 2012-05-30 | 化学工业第二设计院宁波工程有限公司 | System for producing food-grade carbon dioxide by utilizing temperature-rising vaporization cold energy of low-temperature ethylene |
-
2012
- 2012-08-14 CN CN2012102880308A patent/CN102853634A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4460395A (en) * | 1983-01-18 | 1984-07-17 | The Pritchard Corporation | Method and apparatus for producing food grade carbon dioxide |
| US4695304A (en) * | 1984-06-14 | 1987-09-22 | Linde Aktiengesellschaft | Separation of CO2 from a gaseous mixture |
| US4762543A (en) * | 1987-03-19 | 1988-08-09 | Amoco Corporation | Carbon dioxide recovery |
| CN1152732C (en) * | 1999-05-07 | 2004-06-09 | 普莱克斯技术有限公司 | Purification method for increasing carbon dioxide recovery |
| US20020117391A1 (en) * | 2001-01-31 | 2002-08-29 | Beam Craig A. | High purity CO2 and BTEX recovery |
| CN201607093U (en) * | 2009-11-27 | 2010-10-13 | 北京高新利华催化材料制造有限公司 | Device for recovering liquefied carbon dioxide in petrochemical tail gas |
| CN202246075U (en) * | 2011-08-05 | 2012-05-30 | 化学工业第二设计院宁波工程有限公司 | System for producing food-grade carbon dioxide by utilizing temperature-rising vaporization cold energy of low-temperature ethylene |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104481472A (en) * | 2014-10-31 | 2015-04-01 | 中国石油化工股份有限公司 | CO2 flooding output gas separation and reinjection integrated method |
| CN104748506A (en) * | 2015-03-13 | 2015-07-01 | 河南心连心深冷能源股份有限公司 | Device for recycling CO2 from oil field mining assisting tail gas and process thereof |
| CN105502394A (en) * | 2015-12-17 | 2016-04-20 | 江苏华扬液碳有限责任公司 | Separation and purification system for preparing industrial liquid carbon dioxide from gas field carbon dioxide |
| CN111717915A (en) * | 2019-03-19 | 2020-09-29 | 中石化石油工程技术服务有限公司 | Method and device capable of improving capture rate of carbon dioxide in carbon dioxide flooding produced gas of oil field |
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Application publication date: 20130102 |