Discrete multi-point temperature measuring device and measuring method thereof

Abstract

The invention discloses a discrete multi-point temperature measuring device. The device comprises an oil pipe, a perforating gun with one end communicated with the oil pipe, a plurality of temperature measuring units arranged on the outer surface of the perforating gun at intervals, a first hoop arranged on the oil pipe in a sleeving mode and close to the perforating gun, a temperature storage mechanism arranged on the outer surface of the oil pipe and fixed through the first hoop, a battery module arranged outside the oil pipe and with one end connected with the temperature storage mechanism, and a second loop sleeving the oil pipe for fixing the battery module. The discrete temperature measuring mechanism is arranged on the outer surface of the perforating gun to measure the temperature of different underground positions, the measurement is accurate, the use is convenient, and the measurement efficiency is improved. The invention also provides a discrete multi-point temperature measuring method.

Description

technical field [0001] The invention relates to a discrete multi-point temperature measuring device and a measuring method thereof, belonging to the field of underground operations. Background technique [0002] In the process of oil and gas field exploration and development, there are two conventional technologies for temperature measurement: single probe temperature measurement and optical fiber distributed temperature measurement. [0003] Single probe temperature measurement often uses a storage thermometer, including: temperature probe, signal acquisition and processing circuit and battery power supply part, only measures and records the temperature at the depth point of the probe. If it is necessary to measure the temperature of multiple depth points in a certain well section (time-temperature data, that is, temperature profile), corresponding multiple temperature instruments must be installed for temperature measurement. There are two disadvantages in this technical ...

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Problems solved by technology

There are two disadvantages in this technical solution: (1), limited by the length of the instrument itself, the depth interval of temperature measurement points is relatively large, which affects the application of temperature data

(2), each temperature measurement point needs to install a temperature instrument, the operation is cumbersome and the cost is high

The acquisition / input ratio is low, and the operation intensity and complicated operation of clamping several thousand meters of optical fiber are high; (2), the cost is high, especially for the test of oil and gas wells in exploration wells, which takes up the time of the drilling floor and the time efficiency is low; (3), the sensing optical fiber It is necessary to pass through the wellhead Christmas tree and downhole packer before entering the target interval. There may be hidden dangers of leakage in the optical fiber joint and through the seal, which may easily cause signal transmission failure, resulting in the failure of downhole temperature data to be recorded on the ground, and even secondary production. Fault

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