Simultaneous online measurement device for temperature, pressure and steam dryness of steam injection wells

Abstract

The invention relates to a synchronous on-line measurement device for steam-injection type oil well temperature, pressure and steam quality. The synchronous on-line measurement device comprises a temperature demodulator, a pressure demodulator, a reflectivity demodulator and an industrial personal computer located on the ground, as well as a temperature sensor, a pressure sensor, a reflectivity sensor and an underground probe located underground. The underground probe comprises a shell and an airtight barrel arranged in the shell, an annulus is formed between the shell and the airtight barrel, a flow guide hole is formed in the wall of the shell, and the annulus is communicated with the outside through the flow guide hole. Upper ends of the shell and the airtight barrel are all located at a wellhead. The temperature sensor and the reflectivity sensor are all placed in the airtight barrel, and the pressure sensor is located in the annulus and fixed at the wellhead. The technical problem that an existing underground temperature, pressure and saturated steam quality measurement method is not suitable for the underground high-temperature high-pressure environment and low in efficiency is solved, and the method is used for solving the problem about on-line measurement of three parameters of steam-injection type oil well temperature, pressure and steam quality and grasping steam injection situations of an oil well.

Description

technical field [0001] The invention relates to an online test instrument for temperature, pressure and dryness of a steam injection well, in particular to a special device for online measurement of temperature, pressure and dryness of a gas injection well. Background technique [0002] Due to the high viscosity of heavy oil, temperature has a great influence on heavy oil, and the viscosity decreases when the temperature rises. Heavy oil steam injection thermal recovery technology is currently the main means of heavy oil recovery at home and abroad. It uses a once-through boiler to inject wet saturated steam downhole to heat the oil layer to reduce the viscosity of heavy oil to achieve the purpose of recovery. Steam dryness is an index to measure the heat content of steam. The higher the steam dryness, the more heat per unit steam volume, so as to ensure that the oil layer has enough heat energy to reduce the viscosity of crude oil. Therefore, the downhole thermal dynamic m...

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Problems solved by technology

[0004] In order to solve the technical problems that the existing downhole temperature, pressure, and saturated steam dryness detection methods are not suitable for downhole high temperature and high pressure environments, and have low efficiency and low detection accuracy, the purpose of the present invention is to provide an optical fiber temperature, pressure, steam dryness It is a three-parameter synchronous online measurement device for gas injection, which is used to solve the problem of online measurement of three parameters of temperature, pressure and dryness of gas injection wells, and to grasp the steam injection situation of oil wells

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