Carbon dioxide flooding oilfield associated gas recovery device and use method
A technology for associated gas and carbon dioxide in oilfields, applied in chemical instruments and methods, separation methods, gas treatment, etc., can solve the problems of waste liquid and waste gas discharge, and achieve the effect of avoiding emptying, realizing recycling, and realizing recycling.
Active Publication Date: 2021-04-09
CHENGDU ZHENGSHENG ENERGY TECH DEV CO LTD
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[0004] The object of the present invention is to provide a carbon dioxide flooding oil field associated gas recovery device and its use method, to solve the problem of waste liquid and gas discharge in the existing associated gas recovery process, and to provide An environmentally friendly and economical oilfield associated gas recovery device
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[0041] Such as figure 1 As shown, a carbon dioxide flooding oilfield associated gas recovery device includes a separation tank 1, an absorption liquid storage device, a first compressor 3, a second compressor 4, and an expander 5. The separation tank 1 is used to store and realize carbon dioxide separation the absorption liquid; the absorption liquid storage device communicates with the separation tank 1 to realize the recycling of the absorption liquid; the absorption liquid storage device includes a heating device 21 for heating the absorption liquid; the first compressor 3 is connected to separate The tank 1 is used to compress the gas after separating the carbon dioxide; the second compressor 4 is connected to the absorption liquid storage device, and is used to compress the carbon dioxide generated after the absorption liquid storage device is heated; the expander 5 is connected to the second compressor 4, The expander 5 includes a throttle valve 51 and an air collection ...
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The invention discloses a carbon dioxide flooding oilfield associated gas recovery device and a use method. The carbon dioxide flooding oilfield associated gas recovery device comprises a separation tank, an absorption liquid storage device, a first compressor, a second compressor and an expansion machine; the separation tank is used to store absorption liquid which realizes separation of carbon dioxide; the absorption liquid storage device is communicated with the separation tank, so that cyclic utilization of the absorption liquid is realized; the absorption liquid storage device comprises a heating device for heating the absorption liquid; the first compressor is connected with the separation tank and used for compressing the gas after carbon dioxide separation; the second compressor is connected with the absorption liquid storage device and used for compressing carbon dioxide generated after heating of the absorption liquid storage device; and the expansion machine is connected with the second compressor and comprises a throttle valve and a gas collecting cavity, the throttle valve is connected with the second compressor and the gas collecting cavity, and the gas collecting cavity is used for cooling gas compressed by the first compressor. The carbon dioxide flooding oilfield associated gas recovery device is simple in structure, associated gas can be effectively recycled, waste liquid and waste gas are not generated, and the device is energy-saving and environment-friendly.
Description
technical field [0001] The invention relates to the technical field of petroleum and natural gas exploitation, in particular to a recovery device for associated gas in a carbon dioxide flooding oilfield and a method for using it. Background technique [0002] Oilfield associated tail gas is the gas that cannot be directly used when it is discharged with petroleum liquid during oilfield exploitation. In the process of oil recovery using fire flooding, steam flooding or gas flooding (such as carbon dioxide flooding) and other enhanced oil recovery technologies, the methane gas contained in the oil will be discharged together with the oil and gas, and become associated gas in the oilfield production process, with high concentration (>30% vol) associated gas can be directly or indirectly utilized, while associated gas with low content (generally containing 1-10% vol methane) cannot be directly burned and utilized, most of them are directly vented on site to form oil fields A...
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Login to View More IPC IPC(8): B01D53/14B01D53/18
CPCB01D53/1425B01D53/1475B01D53/1493B01D53/18B01D2257/504B01D2258/02B01D2252/10Y02C20/40
Inventor 邓燕龙王开蓉岳应侯浩
Owner CHENGDU ZHENGSHENG ENERGY TECH DEV CO LTD