A verification and error correction method for mud pulse signal
A technology of mud pulse and error correction method, which is applied in the direction of using linear code for error correction/detection, using block code for error correction/detection, data representation error detection/correction, etc., which can solve the problem of communication rate reduction and low coding efficiency, etc. question
Active Publication Date: 2022-06-21
成都深地领航能源科技有限公司
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However, the encoding efficiency of traditional error-correcting codes is low, and the introduction of error-correcting codes will significantly reduce the communication rate
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[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are some, but not all, embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.
[0035] Unless otherwise defined, technical or scientific terms used in this disclosure shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. Use of words like "comprising" or "comprising" in this disclosure means that the elements or things appearing before the word encompass the elements...
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The invention discloses a method for checking and correcting errors of a mud pulse signal, comprising the following steps: S1, adopting a linear transformation method to transform the measurement data collected by a sensor into a positive integer corresponding to the number of bits; S2, denoising the measurement data Processing; S3, the measurement data and the Vandermonde matrix use M RS erasure codes generated by the measurement data to be sent to the ground platform through the mud pulse; S4, extract the measurement data and the RS erasure code in the mud pulse signal, and use the RS erasure code If there is no error code, this set of data will be regarded as correct data and displayed on the human-computer interaction interface; if there is an error code, it will be predicted and compared. According to the relevant characteristics of the measurement data in the measurement while drilling, the invention performs prediction comparison and verification through the historical data, and at the same time combines the global error detection and erasure correction function of the RS erasure code to realize error correction, and corrects random errors in the mud pulse data transmission process It has excellent suppression ability with burst errors.
Description
technical field [0001] The invention relates to the technical field of drilling engineering, in particular to a method for checking and correcting a mud pulse signal. Background technique [0002] In oil drilling engineering, in order to understand the downhole information in real time, the data is usually sent to the surface platform by means of mud pulses. However, due to the influence of factors such as mud pump noise, downhole drilling dynamic noise, mud bubbles, and pulse signal reflection, the quality of the mud channel is poor, and the information carried by the mud pulse often has bit errors, which usually requires manual on-site screening and extraction. information. At the same time, due to the narrow bandwidth available in the mud, the data transmission rate is usually 1-10bit / s. MWD can make the ground platform understand the information of the depth of the formation and the current drilling status, so it plays a vital role in improving the efficiency of oil dr...
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IPC IPC(8): H03M13/15
CPCH03M13/1515
Inventor 张镇胡陈飞刘振磊宋波
Owner 成都深地领航能源科技有限公司