Seismic exploration acquisition excitation well design method based on tomography inversion

Abstract

The invention provides a seismic exploration acquisition excitation well design method based on tomography inversion. The method comprises the following steps: inputting seismic data loaded with spatial attributes, and picking up reliable first arrival time; performing chromatography inversion or micro-logging constraint chromatography inversion processing, and obtaining weathered layer speed V1,deceleration layer speed V2 and low deceleration zone thickness attributes; calculating a transmission coefficient V1 / V2, and analyzing a corresponding relationship between an original record energy attribute of the target area and the transmission coefficient and a distribution rule on the surface to serve as a basis of well position design; and designing an excitation well position and a well depth according to the original record energy attribute, the transmission coefficient attribute and the low deceleration zone thickness attribute. According to the seismic exploration acquisition excitation well design method based on chromatography inversion, a good foundation is laid for obtaining original data with good amplitude consistency, the consistency of original record amplitudes is improved in seismic data acquisition, and the method has a good application prospect in high-fidelity exploration.

Description

technical field [0001] The invention relates to the field of acquisition of geophysical exploration seismic data, in particular to a method for designing excitation wells for seismic exploration acquisition based on tomographic inversion. Background technique [0002] Seismic acquisition is the first link in seismic exploration, and the quality of the acquired data directly affects the quality of the final interpretation results. In seismic acquisition operations, the excitation well depth is an important construction parameter, and the optimal excitation well depth plays a significant role in improving the recording signal-to-noise ratio and resolution. [0003] At present, seismic exploration data has higher and higher requirements for amplitude preservation. It is hoped that the energy of the original records recorded is basically the same, and the consistency of the excitation energy is closely related to the location and depth of the excitation well. In the acquisition...

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Problems solved by technology

[0004] Aiming at the practical problems that the design basis of well location and well depth is not sufficient, the pertinence of the design is not strong enough, and the consistency of the energy of the original seismic record is not ideal enough in the current seismic data acquisition, the present invention provides a tomographic inversion based The design method of seismic exploration acquisition excitation well, in order to obtain the original seismic record with good amplitude consistency

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