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

A measuring device and pressure technology, which is applied in the field of steam injection oil well temperature, dryness online testing instrument and pressure field, can solve the problems of low efficiency, low detection accuracy, inapplicability, etc., and achieve low environmental requirements, simple measurement system, high precision effect

CN103615231BActive Publication Date: 2016-04-27东莞市中科原子精密制造科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2016-04-27

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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.
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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...

Examples

Embodiment Construction

[0022] Below in conjunction with accompanying drawing, the present invention will be further described:

[0023] Such as figure 1 As shown, this online measuring device for temperature, pressure and dryness of steam injection well consists of temperature sensor, pressure sensor, reflectivity sensor, temperature demodulator, pressure demodulator, reflectivity demodulator, memory, industrial computer and downhole Probe composition.

[0024] The industrial computer includes a signal processor and a single-chip memory installed on the circuit board, and the circuit board and the power supply battery are installed in the chassis.

[0025] The downhole probe includes a casing and a closed cylinder arranged inside the casing. An annulus is formed between the casing and the closed casing, and diversion holes are provided on the casing wall. The annulus communicates with the outside of the downhole probe through the flow diversion holes; the casing and the closed casing The upper end...