Open AccessPOSSIBILITY AND APPLICABILITY OF PSEUDO-RANDOM CODE FUNCTIONS IN IMPULSE-CODE SEISMIC CONCENTRATION TO OIL AND GAS SEISMOLOGY PROBLEM-SOLVING RESEARCH
Author(s) -
Р. Е. Хасан,
Ю. П. Кострыгин
Publication year - 2018
Publication title -
geofizičeskie tehnologii
Language(s) - English
Resource type - Journals
ISSN - 2619-1563
DOI - 10.18303/2619-1563-2018-1-4
Subject(s) - seismic vibrator , impulse (physics) , code (set theory) , random noise , impulse response , pseudorandom number generator , algorithm , mathematics , computer science , seismology , statistical physics , geology , physics , mathematical analysis , set (abstract data type) , quantum mechanics , programming language
The applicability of pseudo-random code functions in impulse-code seismic concentration to oil and gas seismology problemsolving has been assessed through the comparative analysis of correlation functions in compliance with pseudo-random pulse sequences and linear change in pulse repetition sequences. The research shows that the correlation functions’ main peaks spectrums of pseudo-random pulse sequences are almost equal to the single impulses’ spectrums used for the sequences development. The given circumstance reflects the general possibility of pseudo-random sequences applicability to oil and gas seismology problemsolving. However, pseudo-random sequences are characterised by the increased interference level of correlative transformation, which makes the use of pseudo-random code functions in oil and gas seismology inappropriate. It is noted that not only are impulsecode pseudo-random signals characterised by high-amplitude correlation noise, but also all the other pseudo-random complex signals, e.g. random quasi-harmonic signals, contained in modern vibroseis management systems.