Carbon dioxide flooding can realize effective development of low production and low permeability oil fields

but due to gradual gas flow in production wells

part of the gas flow is large

conventional treatment equipment and technology cannot adapt

which seriously affects the production. After many years of field tracking and testing

this paper has invented a new type of oil well site separation and collection equipment

and innovated the structure of gas-liquid primary separation equipment

thus to solve the problems of poor gas-liquid separation effect and unstable production operation. It has innovated the separation settlement heating buffer combination equipment and the natural gas drying and oil removing combination equipment

integrated multiple functions

replaced the three-phase separator

heating furnace

buffer tank

light tube dryer

natural gas oil removing device and other equipments in the conventional process

which greatly simplifies the technological process and reduces the construction investment and operation cost. The "double-gas-double-liquid separation and oil-conversion process" was invented

which can not only adapt to the actual production demand with a wide range of gas-oil ratio variation

but also improve the separation effect. Finally

the sealing

stable gathering

transportation and treatment of the produced fluid of the oil well were realized

and the benefit development of the oil field was guaranteed. The accumulative output of oil was 537 000 tons

and the accumulative buried carbon dioxide was more than 1 616 000 tons. The economic and social benefits were very significant.