On-line integrated monitoring device and method for deep well oil and gas reservoir temperature and pressure

Abstract

The invention provides a deep well hydrocarbon reservoir temperature and pressure intelligent on-line monitoring device. A test plane and a transition plane are processed in the eccentric oil pipe, an optical fiber Bragg grating strain sensor is formed on the test plane through high-temperature bonding, one end of the optical fiber Bragg grating strain sensor is fixedly arranged on the test plane, and the other end of the optical fiber Bragg grating strain sensor passes through an optical fiber channel arranged between the test plane and the transition plane to reach the transition plane. One end, near the transition plane, of the optical fiber channel is connected with a stainless steel capillary pipe, the optical fiber penetrates into the stainless steel capillary pipe after being led out from the optical fiber channel, the stainless steel capillary pipe approaches to the transition plane and extends to a position near an optical fiber modem interface on the well, and the optical fiber is protected from being influenced by external severe environment in the whole process. The on-line monitoring device related by the invention realizes the deep well oil pipe structure integration, and has the advantages that the size is small, no additional auxiliary structure is adopted, the anti-interference capability is high, signals are stable and reliable, the response speed is high, and the like, and the on-line obtaining precision and the reliability of key information such as deep well hydrocarbon reservoir temperature and pressure can be obviously improved.

Description

technical field [0001] The invention relates to an intelligent on-line monitoring device for temperature and pressure of deep well oil and gas layers, specifically a device based on fiber Bragg grating technology that can monitor the temperature and pressure of oil and gas layers in an underground deep well environment exceeding 3-4km. A device for real-time online monitoring of parameters. Background technique [0002] As a non-renewable strategic resource, petroleum is related to a country's economic and political security. Ensuring the safe supply of oil and gas has always been an important energy strategic measure for all countries. Well logging is an essential and important link in the process of petroleum exploration and development. In the process of oil field development, people need to know the detailed information about the state and characteristics of the fluid in the well during the process of liquid production or water injection and steam injection through wel...

AI Technical Summary

Problems solved by technology

Traditional electronic pressure and thermometers can no longer meet the test needs, and fiber-optic pressure and temperature monitoring technology suitable for high temperature and high pressure environments must be used

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