Distributed deep hole signal acquisition device

Abstract

The invention discloses a distributed deep hole signal acquisition device which comprises a signal acquisition unit, a signal processing unit and a microprocessor. The signal acquisition device is arranged in a deep hole. The signal acquisition unit acquires a demodulating signal. The signal processing unit processes the demodulating signal for obtaining a digital signal, acquires data information which is related with an underground pressing crack condition according to the digital signal, and uploading the data information to an overground monitoring host computer. The distributed deep hole signal acquisition device is arranged in the deep hole and can acquire more accurate deep signals.

Description

technical field [0001] The invention relates to the field of signal acquisition, in particular to a distributed deep hole signal acquisition device. Background technique [0002] At present, in order to grasp the direction of fracturing, microseismic monitoring is used during oil production and fracturing. It is now common practice to embed geophones under the shallow layer of the ground to measure microseismic signals. Since the location of the fracturing is far away from the ground , some places of use exceed the depth of 1000 meters. At present, the devices used for well logging are generally divided into two types: one is to place sensors between wells and collect signals on the ground, and the other is to collect signals in wells. The noise in the signals collected by the above two devices Larger, resulting in a lower signal-to-noise ratio of the collected signal; therefore, there is an urgent need for a signal acquisition device that can improve the signal-to-noise rat...

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Problems solved by technology

[0002] At present, in order to grasp the direction of fracturing, microseismic monitoring is used during oil production and fracturing. It is now common practice to embed geophones under the shallow layer of the ground to measure microseismic signals. Since the location of the fracturing is far away from the ground , some places of use exceed the depth of 1000 meters. At present, the devices used for well logging are generally divided into two types: one is to place sensors between wells and collect signals on the ground, and the other is to collect signals in wells. The noise in the signals collected by the above two devices Larger, resulting in a lower signal-to-noise ratio of the collected signal; therefore, there is an urgent need for a signal acquisition device that can improve the signal-to-noise ratio of the collected signal when it goes deep into the ground at a depth of one thousand meters

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