System and method for measuring heat of wet steam generator special for oilfields

Abstract

The invention belongs to the field of oilfield exploitation, and in particular relates to a system and a method for measuring the heat of a wet steam generator special for oilfields. The system for measuring the heat of the wet steam generator special for the oilfields consists of a flow measurement device, a pressure measurement device, a temperature measurement device, a steam-liquid slip ratio measurement device and an arithmetic and control unit, wherein the steam-liquid slip ratio measurement device comprises a pipeline, pin fins and vortex pulse width sensors; the pin fins are arranged on a center line of the pipeline; the vortex pulse width sensors are arranged on the downstream parts of the pin fins in the pipeline; and the pin fins are matched with the vortex pulse width sensors. The system and the method have the advantages of completely replacing manual test, solving the problem of heat control delay with online real-time monitoring, preventing pipe explosion caused by the overheat of the wet steam generator, improving the steam-absorption effect of an oil layer, and analyzing causes for the pipe explosion with continuously stored data to ensure safety in production, along with high measurement result accuracy.

Description

technical field [0001] The invention belongs to the field of oilfield exploitation, in particular to a heat measurement system and method for a wet steam generator. Background technique [0002] Oil well production fluid is a three-phase mixture of oil (crude oil), gas (natural gas), and water (formation water). The natural gas enters the natural gas system after being separated by the separator, the crude oil enters the refinery after sedimentation and dehydration, and the water enters the special wet steam generator for the oil field after advanced sewage treatment. The wet steam generator is simply a kind of water and high-temperature hot flue gas ( The flue gas comes from the heat exchanger of the oil and gas burner), and the water is heated to produce a water-steam mixture (ie, wet saturated steam), and the wet saturated steam is injected into the oil well to heat the underground crude oil. , poor fluidity (heavy oil), the underground heavy oil needs to be heated to re...

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Problems solved by technology

[0008] The measurement of the measuring tube is to install a long-necked nozzle or a V-cone measuring tube at the outlet of the wet saturated steam. This measurement method assumes that the wet saturated steam at the outlet is an ideal state gas, that is, the water in the wet saturated steam is evenly distributed in the dry steam. Long-neck nozzle or V-cone measures the differential pressure of the tube, and the steam heat is obtained through empirical formulas or on-site fitting calculations. This measurement method is obviously inaccurate, because the vertical section and horizontal section of the outlet pipeline of the special wet steam generator in the oil field The flow pattern of wet saturated steam is complex, and it is difficult to calculate with the ideal state gas equation

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