Oil field high-temperature produced liquid waste heat recovery and power generation system

Abstract

The invention belongs to the technical field of petroleum exploitation and particularly relates to an oil field high-temperature produced liquid waste heat recovery and power generation system. By adopting the oil field high-temperature produced liquid waste heat recovery and power generation system, high-temperature produced liquid is separated into a low-temperature produced liquid and an oil-containing waste steam through a normal-pressure separator; a high-temperature condensate is produced with the oil-containing waste steam through a spray tower, and a low-temperature noncondensable gasis separated out; the high-temperature condensate is separated into an oil portion and a water portion through an oil-water separator, and the water portion is conveyed to a heat exchanger to performheat exchange with an organic medium gas of an ORC power generation system and is then conveyed to the spray tower for circulating utilization after being cooled by the heat exchanger; high-temperature and high-pressure organic medium gas obtained with heat exchange does work in an expander, and the expander drives the power generator for power generation; and a low-temperature and low-pressure organic medium liquid which is produced with the high-temperature and high-pressure organic medium gas finally can be reused to the heat exchanger. The technical scheme of the invention solves the problems of pollution and heat waste caused by the oil field high-temperature produced liquid in the temperature and pressure lowering process in the prior art.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploitation, and in particular relates to a waste heat recovery and power generation system of oilfield high-temperature production fluid. Background technique [0002] The world's heavy oil resources are extremely rich, and its geological reserves far exceed the reserves of conventional crude oil, while my country's heavy oil reserves rank seventh in the world. [0003] At present, the thermal recovery method is generally adopted for the recovery of heavy oil, which utilizes the mechanism of viscous reduction of heavy oil heating, the oil displacement mechanism of oil layer thermoelastic energy release, and the dilution and miscible flooding effect of steam on heavy oil distillation, cracking and emulsification. A large amount of steam is injected into formation crude oil to improve the seepage capacity of heavy oil and realize the industrialized exploitation of heavy oil. [0004] But, inven...

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Problems solved by technology

[0006] The embodiment of the present application provides a waste heat recovery and power generation system for oilfield high-temperature production fluid, which solves the problems caused by the oily waste steam generated in the prior art during the process of reducing the temperature and pressure of oilfield high-temperature production fluid and directly discharges into the atmosphere. Technical problems of pollution and heat waste, to achieve the technical effect of purifying oily waste gas in oil fields and improving its heat energy utilization rate

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