A Forward Modeling Method of Staggered Grid Wave Equation Based on Actual Seismic Data

Abstract

The invention discloses a method for forward modeling of staggered grid wave equation based on actual seismic data, which uses wavelets of actual seismic data to perform forward modeling simulation, and overcomes the defect of poor matching of seismic data in the prior art; The differential format and the use of multi-source information to constrain the parameters of the forward modeling model improve the accuracy of the forward modeling and overcome the dispersion phenomenon; closely combine the known multi-source data (seismic, well logging, geological and other data) to optimize the forward modeling technical process and geological construction Modeling process, setting up the observation system in advance, there is no need to manually modify the parameters of the observation system during the forward modeling process, which improves the calculation efficiency and calculation accuracy. The present invention uses wavelets of actual seismic data based on actual seismic, logging, and geological data to perform forward modeling on the actual geological model by first stacking and then gradually iterating the geological model and then pre-stacking forward modeling, which can flexibly match various regions Seismic data, with high calculation accuracy and calculation efficiency.

Description

technical field [0001] The invention belongs to the technical field of seismic forward modeling simulation for exploration, in particular to a method for forward modeling of interlaced grid wave equations based on actual seismic data. Background technique [0002] Seismologists first used the finite difference method to solve the wave propagation problem as early as 40 years ago. Most of the early finite difference methods for studying seismic wave propagation were based on the second-order displacement equation. Alterman and Karal (1968) first applied the finite difference method to numerical simulation of seismic waves in homogeneous media. Boore (1972) used the finite difference method to simulate the propagation of seismic waves in heterogeneous media. Alford (1974) studied the accuracy of finite-difference simulations of the acoustic wave equation. Kelly et al. (1976) studied methods for making synthetic seismic records using finite differences. Mdariga (1976) propos...

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Problems solved by technology

[0013] The purpose of the present invention is to provide a method for forward modeling of staggered grid wave equation based on actual seismic data. low efficiency problem

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