Green low-carbon development system and method for thickened oil

Abstract

The invention discloses a green low-carbon development system and method for thickened oil, and relates to the technical field of thickened oil development, and the system comprises a waste steam treatment module, a non-condensable gas treatment module, a water treatment module, a CO2 capture module, a boiler and a steam treatment module. Middle-grade waste heat obtained in the oil field high-temperature waste steam treatment process is used as a heat source needed for CO2 capture, flammable non-condensable gas obtained in the high-temperature waste steam treatment process is used for partially replacing boiler fuel, condensate water obtained in the high-temperature waste steam treatment process is used as boiler feed water, waste heat resources are reasonably utilized, and the CO2 capture effect is improved. According to the invention, waste of heat energy is reduced, the heat balance problem that a large amount of waste heat cannot be utilized in the oil extraction process is partially solved, resource utilization of medium-grade waste heat, non-condensable gas and condensed water in high-temperature produced liquid of an oil field can be realized, high-quality superheated steam and liquid CO2 can be provided for production of the oil field, and near-zero emission of CO2 of the whole system is realized at the same time; therefore, green and low-carbon development of the thickened oil is realized.

Description

technical field [0001] The invention relates to the technical field of heavy oil development, in particular to a green and low-carbon heavy oil development system and method. Background technique [0002] In the process of thermal recovery of heavy oil in the oil field, steam needs to be injected into the steam injection well. The steam forms a steam cavity in the formation, and the steam cavity expands upwards and sideways, and exchanges heat with the crude oil in the oil layer. The heated crude oil and steam condensed water rely on Gravity drains to the horizontal production wells below. Heavy oil production fluid has high pressure and high temperature (about 200°C), and it needs to be depressurized and cooled after being transported from the well site to the oil transfer station. Gas and a small amount of light oil. [0003] At present, the oilfield production fluid treatment method is mainly to use ethylene glycol to circulate and cool the waste steam from the flash ev...

AI Technical Summary

Problems solved by technology

At present, a large amount of steam needs to be injected into the heavy oil production process, and the boiler water required by the steam injection boiler comes from the oil field sewage, the water quality is poor, and it is impossible to produce high-quality superheated steam, which cannot meet the steam quality requirements of the current heavy oil production.

At the same time, the steam injection boiler will produce carbon dioxide to form carbon emissions during the production process, which does not meet the carbon emission reduction requirements of oil field exploitation.

Images