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SEISMIC TRAVEL TIME TOMOGRAPHIC INVERSION METHOD BASED ON TWO POINT RAY TRACING
SEISMIC TRAVEL TIME TOMOGRAPHIC INVERSION METHOD BASED ON TWO POINT RAY TRACING
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机译：基于两点射线跟踪的地震行进时间层析成像反演方法
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摘要
The present application provides a seismic travel time tomographic inversion method based on two-point ray tracing comprising: collecting seismic data including direct wave travel time and reflected wave travel time; establishing an initial one-dimensional continuously layered model having continuously a varying intraformational velocity; representing a ray parameter p by a variable q, representing a source-receiver distance X by a function X=f(q) of the variable q, solving the function X=f(q) using a Newton iteration method; calculating a theoretical direct wave travel time and reflected wave travel time according to the ray parameter p; comparing the calculated theoretical arrival time with actual arrival time, using an optimal algorithm to adjust velocity parameters of the initial one-dimensional continuously layered model, until a difference between the theoretical direct wave travel time and reflected wave travel time and the actual direct wave travel time and reflected wave travel time complies with a predetermined error standard.
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