Natural gas storage temperature, pressure and vibration monitoring system

Abstract

The invention provides a natural gas storage temperature, pressure and vibration monitoring system, and relates to a natural gas storage monitoring system. The system comprises a distributed optical fiber temperature measuring system, a quasi-distributed optical fiber pressure measuring system and a distributed optical fiber vibration testing system, wherein the distributed optical fiber temperature measuring system adopts a distributed optical fiber temperature measuring system based on an optical frequency domain reflection system (OFDR-DTS), and the distributed optical fiber temperature measuring system is composed of a high-precision temperature measuring optical transceiver, a monitoring optical cable and a connecting tail fiber E2000 / APC; and the quasi-distributed optical fiber pressure measuring system is composed of an optical fiber temperature and pressure demodulator, an optical fiber pressure sensor and a monitoring optical cable. The multi-parameter real-time dynamic monitoring for a temperature profile, pressure and vibration of a natural gas well (gas storage) is realized, the monitoring system can be applied to different well types such as a gas injection well, an observation well, a vertical production well and a horizontal production well, and an evaluation basis can be provided for downhole fluid properties, a gas-liquid interface, an injection-production profile and wellbore integrity.

Description

technical field [0001] The invention relates to a monitoring system for a natural gas storage, in particular to a temperature, pressure and vibration monitoring system for a natural gas storage. Background technique [0002] Accurate and timely understanding of downhole temperature and pressure changes in natural gas (gas storage) wells is the key to efficient and safe operation of natural gas (gas storage) wells. Predicting injection-production parameters and evaluating storage capacity are problems that need to be solved. However, the operation of natural gas (gas storage) wells has time, space, and uncertainty. There are gas injection periods, gas production periods, and peak-shaving emergency periods. It is a process of periodic repeated strong injection and strong production. The range of changes is large, and the conventional monitoring process cannot meet the timely, rapid, accurate, long-term and efficient monitoring requirements of natural gas (gas storage). [000...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a natural gas storage temperature pressure and vibration monitoring system, the system uses a high-precision optical fiber temperature and pressure long-term monitoring system, and assists the optical fiber vibration testing system to realize the gas storage observation well temperature profile, pressure, Vibration real-time monitoring is used to understand downhole fluid properties, gas-liquid interface, injection-production profile, and wellbore integrity, which solves the problem that conventional monitoring systems cannot meet the timely, rapid, accurate, and long-term monitoring of natural gas (gas storage)

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