Adaptive mud pulse data processing method, system and equipment
A mud pulse and data processing technology, applied in the field of data processing, can solve the problems of large attenuation of downhole digital data, excessive interference, insufficient information acquisition accuracy, etc., and achieve the effects of enhancing attenuation information, reducing interference, and eliminating deviations.
Active Publication Date: 2021-11-02
WEIZHUO PETROTECH (BEIJING) LTD
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[0005] In order to solve the above problems in the prior art, that is, the downhole digital data obtained by the existing downhole data acquisition method is too attenuated and too much interference leads to insufficient information acquisition accuracy, the present invention provides an adaptive mud pulse data processing method , the method includes:
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[0047] The application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain related inventions, not to limit the invention. It should also be noted that, for the convenience of description, only the parts related to the related invention are shown in the drawings.
[0048] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.
[0049] The invention provides an adaptive mud pulse data processing method. The method realizes information extraction of mud pulse signals, reduces interference, enhances attenuation information, and improves the accuracy of identifying data from mud pulses.
[0050] A kind of adap...
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The invention belongs to data processing, and specifically relates to an adaptive mud pulse data processing method, system, and device, aiming to solve the problem of insufficient information acquisition accuracy due to excessive attenuation and excessive interference of downhole digital data obtained by the existing downhole data acquisition method question. The invention includes: preprocessing the signal to be tested by DSP software to generate an in-phase data stream I and a quadrature data stream Q, and convert it into a complex form (I+jQ) and extract samples, and reduce the The sinusoidal level noise in the telemetry frequency band is used to realize initial synchronization, and automatic gain control is performed according to the initial synchronization information to generate a gain signal to be tested; based on the gain signal to be tested, 2 sample symbols are extracted each time to generate a decision equalized signal through a decision feedback equalizer. The decision equalized signal is decoded and saved. The invention reduces the interference caused by the environment, enhances attenuation information, and improves the accuracy of identifying data from mud pulses.
Description
technical field [0001] The invention belongs to the field of data processing, and in particular relates to an adaptive mud pulse data processing method, system and equipment. Background technique [0002] Drilling and production operations require a great deal of information about downhole parameters and mines, such information may include the properties of the formations through which the borehole penetrates as well as data relating to the size and structure of the borehole itself. [0003] MWD tools generate pressure signals downhole. The pressure signal propagates to the ground in the form of digitally modulated data, and the digital data can be detected and recovered from the pressure signal; however, when the pressure signal carrying digitally modulated data propagates upward along the drill string, it is prone to attenuation and noise, and the signal in the acoustic Points of impedance mismatch produce reflections. These impedance mismatches often occur with variatio...
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IPC IPC(8): H03H21/00E21B47/18
CPCE21B47/18H03H21/0012
Inventor 杨绍国李航运
Owner WEIZHUO PETROTECH (BEIJING) LTD