Directional seismic wave data processing method based on n times root stacking

Abstract

The invention relates to a directional seismic data processing method based on Nth root stacking. The directional seismic data processing method includes that Nth root solving is performed on a group of adjacent seismic records sequentially; the seismic records after being processed are subjected to equal interval delay processing; the seismic records after time delay processing are related, and in order to inhibit signal distortion outside a main wave beam direction, Nth power processing is performed on the seismic records to acquire needed directional seismic records. Experiments show that under high-noise environment, existing seismic wave processing methods can enhance effective signals in the main wave beam direction while signal ambiguity or signal same-phase axis forking outside the main wave beam direction occurs, so that seismic data signal-to-noise ratio and resolution ratio are lowered, and subsequent seismic data processing and explaining are adversely affected. Compared with existing directional seismic wave processing methods, the directional seismic data processing method has the advantages that effective signals in original records are fully protected and enhanced, signal-to-noise ratio in the main wave beam direction is increased by n times, and more importantly, signal distortion outside the main wave beam direction is inhibited effectively.

Description

Technical field: [0001] The invention relates to an artificial directional seismic prospecting method, in particular to a directional seismic wave method based on N-time root superposition, which is proposed when the seismic signal is distorted outside the direction of the main seismic wave beam during the formation of conventional directional seismic waves. Background technique: [0002] The idea of ​​beam steering originated from the field of phased radar. Because the method of beam orientation can effectively strengthen the reflected wave signal from the target body, it has been introduced into the field of seismic exploration. [0003] CN1560650 discloses a "phased array seismic exploration method", in which one main control unit controls more than one or even N vibroseis sub-stations. The main control unit realizes human-computer interaction by LCD screen and keyboard, realizes parameter access by E2PROM, and realizes the interaction between master and slave by communi...

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Problems solved by technology

[0011] The purpose of the present invention is to provide a directional seismic wave data processing method based on N root stacking in order to solve the problem of signal ambiguity or false event waveform distortion caused by signals outside the direction of the main beam in directional seismic records due to lack of in-phase stacking

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