A kind of oil-gas separation mixed transportation pressurized skid and its technology

Abstract

The invention relates to an oil-gas separation mixed transportation pressurization skid and a process thereof. The oil-gas separation mixed transportation pressurization skid includes a filter, a heating furnace, a buffer separation tank, a gas-liquid separator, a first oil transfer pump, a second oil transfer pump, a compressor and valves, and the filter, the heating furnace, the buffer separation tank, the gas-liquid separator, the first oil transfer pump, the second oil transfer pump, the compressor and the valves are arranged on a skid seat. The process includes the steps that incoming oilis filtered through the filter into the heating furnace and then enters the buffer separation tank; associated gas is separated from crude oil by the buffer separation tank, and the separated crude oil is pressurized by the oil transfer pumps for outward transportation; and the separated associated gas is separated by the gas-liquid separator for secondary filtration, and then pressurized by thecompressor and transported outwards with the crude oil at the same time. According to the oil-gas separation mixed transportation pressurization skid and the process thereof, pure liquid phase delivered by pumps is ensured, the problems of high failure rate and short service life of the pumps caused by oil-gas mixing transportation are solved, vibration, heating and other adverse effects caused bydirect mixed transportation of the oil and gas through the pumps can be eliminated, the service life of the pumps is prolonged, the maintenance cost is reduced, the separated associated gas is transported outwards by the compressor, the associated gas in the crude oil is fully recycled, the resource utilization rate is improved, the environment is protected, and the process can effectively improve the efficiency of equipment operation.

Description

technical field [0001] The invention belongs to the technical field of oil and gas transportation in oil and gas fields, and in particular relates to an oil and gas separation mixed transportation pressurized skid and its technology. Background technique [0002] Crude oil contains associated gas. According to the existing technology, the pressurization point only heats, pressurizes and transports the crude oil, and does not process the oil and gas. The existing site oil and gas mixed transportation process mainly includes the following two types: the first one is a small part of oil and gas separation process, that is, part of the associated gas is separated from the incoming oil through the separation buffer tank according to the on-site process, and is used by the heating furnace and directly passed through the rest of the incoming oil. Mixed pump output. Under this process, the composition of the incoming oil medium is extremely unstable, such as a large slug flow, or t...

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Problems solved by technology

But the problem is that only a small part of the separated associated gas can be used in the heating furnace, and the rest of the associated gas cannot be processed. In addition, it is uneconomical to lay gas pipelines, so it is treated by on-site venting or torch burning, which causes environmental pollution and waste of resources.

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