Vibroseis synchronous scanning wave field forward numerical simulation method

Abstract

The invention provides a vibroseis synchronous scanning wave field forward numerical simulation method, belonging to the field of oil exploration. The method comprises the steps of (1) inputting a simulation parameter, (2) calculating and obtaining a vibroseis synchronous scanning simulation parameter according to the simulation parameter inputted in step (1) and outputting the parameters into a parameter file, wherein the vibroseis synchronous scanning simulation parameter comprises the position of each vibroseis, starting and stopping scanning times, a synchronous source to which the vibroseis belongs, continuous recording time length and the scanning signal of each synchronization element; (3) calculating and obtaining a simulation record through high-order finite-difference wave field continuation, and (4) outputting a simulation result. According to the method, according to the need of actual simulation, through the controlling of the input parameter, the forward numerical simulation continuous record of sliding scanning, independent synchronous scanning, pseudo random scanning, distance opening synchronous scanning technology and V1 and other multiple vibroseis synchronous scanning and the forward simulation continuous records of any number of vibroseis are simulated.

Description

technical field [0001] The invention belongs to the field of petroleum exploration, and in particular relates to a forward numerical simulation method for synchronous scanning wave field of a vibrator. Background technique [0002] Vibroseis synchronous scanning (also known as synchronous excitation) technology is a high-efficiency seismic acquisition technology developed in recent years. Since the interaction between the scanning signals of each seismic source is not considered in the acquisition process, this technology can greatly shorten the acquisition period and reduce the acquisition cost. At present, this technology is gradually becoming practical, but there are still various technical problems in its data processing. The development of vibroseis synchronous scanning forward numerical simulation technology is of great significance to the research of this processing technology. [0003] At present, the conventional seismic wave field numerical simulation technology ...

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Problems solved by technology

[0003] At present, the conventional seismic wave field numerical simulation technology has been developed to the stage of lithology and reservoir simulation. The conventional seismic wave field forward modeling numerical simulation technology based on the elastic wave equation of explosive source and vibrator scanning has been perfected, but there is no relevant vibrator In the literature and reports of synchronous scanning forward modeling technology, most of the research on multi-source seismic method technology currently uses synthetic multi-source seismic data from conventional explosive source simulation data (or conventional acquisition data) or actual field vibroseis synchronous scanning. Actual data, because this kind of synthetic data is different from the real multi-source data, and the actual data is too complex, which affects the progress of multi-source seismic processing technology

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