High Precision Seismic Wave Field Numerical Simulation Method And Its Application Research

Seismic wave field numerical simulation is the seismic modeling method of numerical seismic record, which is assumed that the structural model of underground medium and the corresponding physical parameters is under the condition of known, simulation studies the propagation rules of seismic waves in the ground all sorts of medium, and calculating in the observation point on the ground or underground observations.This method is the study of complex area of seismic data acquisition, processing and interpretation of effective way. The method can be summarized as three types: ray tracing method,the integral equation method and wave equation numerical solution method. Due to the wave equation of seismic wave field numerical simulation method using numerical method to solve the wave equation directly, containing the dynamic and kinematics characteristics of seismic wave, the wave field information is rich, the simulation results are accurate, so the wave equation numerical simulation method has been occupies an important position in the Seismic wave field numerical simulation.This article proposes the high precision seismic wave field numerical simulation method about the integrated modeling, elastic forward + pre-stack processing + migration processing, fluid substitution technology high precision seismic wave field numerical simulation method. Firstly, it sets from the principle of two-way wave equation numerical simulation and the modeling method of conventional analysis and summary, which is based on the conventional model establishment method shortcomings, and puts forward the comprehensive modeling method, which contains the precise modeling and mathematical model for parameter established by rock physics test data and logging data. Secondly, this article fully research all kinds of forward modeling methods, select the double elastic wave equation forward modeling, processes forward records by pre-stack processing and migration processing,and forms a set of the elastic forward + pre-stack procession + migration processing of new processes. to high precision seismic wave field numerical simulation is a new way of thinking. And on the final model, the fluid substitution technology analysis under different fluid saturation in reservoir numerical simulation of the seismic response characteristics of provide reliable theoretical basis for subsequent oil-water identification. At last combined with the actual seismic data of BH areas application analysis, get the following conclusions:(1) the comprehensive modeling method can get more precise model and mathematical model for parameter;(2) put forward the elastic forward + pre-stack processing + migration processing integrated approach;(3) on the final model, analyzing reservoir using fluid substitution technology, fluid saturation can be obtained under the seismic reflection wave field characteristics of reservoir, as the theoretical basis is provided for subsequent oil-water identification;(4) the BH area of typical model analysis with high precision seismic wave field numerical simulation method to study, and the seismic response characteristics of the typical model analysis in the study area has practical application value.