Electromagnetic seismic data joint processing method and device

Abstract

The invention provides an electromagnetic seismic data joint processing method and device, and relates to the technical field of geophysical exploration, and the method comprises the steps: obtainingseismic observation data, electromagnetic observation data and logging speed data of a target measurement point; generating a horizon interpretation result according to the seismic observation data; utilizing the electromagnetic observation data and the horizon interpretation result to invert to obtain resistivity profile data; determining speed resistivity relation model data according to the logging speed data and the resistivity profile data; and generating an electromagnetic seismic data joint processing result according to the speed resistivity relation model data and the resistivity profile data. Joint inversion modeling is carried out by utilizing logging, magnetotelluric and seismic data in a high and steep structure area to obtain velocity and resistivity relation model data, andgeological structure imaging data are generated by utilizing a physical relation model of logging velocity and inversion resistivity, so that the seismic imaging effect of the high and steep structurearea can be improved.

Description

technical field [0001] The invention relates to the technical field of geophysical exploration, in particular to a method and device for joint processing of electromagnetic seismic data. Background technique [0002] In high-steep and complex structural areas, due to problems such as terrain undulations, limestone outcropping or weathering, seismic excitation and reception are difficult, and the signal-to-noise ratio of data is low. Seismic data in the main structural parts generally have reflection blank areas or no reflections; There are many faults, the vertical and horizontal variations of the structure, the large vertical and horizontal changes of the velocity field, and the difficulty of velocity modeling, resulting in inaccurate structural imaging, weak energy and poor continuity of reflected waves in deep layers. Therefore, how to accurately image the underground complex geological structure in high and steep structural areas is still a challenging problem. Content...

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Problems solved by technology

[0002] In high-steep and complex structural areas, due to problems such as terrain undulations, limestone outcropping or weathering, seismic excitation and reception are difficult, and the signal-to-noise ratio of data is low. Seismic data in the main structural parts generally have reflection blank areas or no reflections; There are many faults, the structure varies vertically and horizontally, the velocity field varies greatly vertically and horizontally, and velocity modeling is difficult, resulting in inaccurate structural imaging, weak energy and poor continuity of reflected waves in deep layers

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