Seismic wave forward modeling method and device based on Gaussian beam field simulation
A technology of wave field simulation and Gaussian beam, which is applied in the field of seismic wave forward modeling based on Gaussian beam wave field simulation, can solve the problems of steep dip angle limitation, inability to simulate large angle and rotary wave field, difficult to remove, etc., to overcome the problem of caustics , the effect of overcoming the two-point ray tracing problem
Inactive Publication Date: 2019-04-19
CHINA PETROLEUM & CHEM CORP +1
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Seismic wave field numerical forward modeling for seismic imaging only needs to simulate transmitted waves, and its calculation methods include: acoustic wave equation full wave field finite difference method can deal with complex velocity models but is very time-consuming, and the simulation of the full wave field includes all wave arrivals It makes it difficult to remove unnecessary direct waves, multiple waves, and converted waves, etc.; the one-way wave operator only simulates transmitted waves, which has high efficiency and is suitable for processing large-scale data, but the biggest disadvantage is the limitation of steep angles, which cannot be simulated Large Angle and Rotary Wavefield
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[0019] Preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
[0020] figure 1 A flow chart of a seismic wave forward modeling method based on Gaussian ray beam wave field simulation according to an embodiment of the present invention is shown, the method includes:
[0021] Step 101, starting from the source point, performing Gaussian beam simulation at multiple exit angles, and the Gaussian beams at different exit angles are independent of each other;
[0022] Step 102, using the Gaussian beam integral to superimpose al...
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The invention discloses a seismic wave forward modeling method and device based on Gaussian beam field simulation. The method includes: starting from a focus point, respectively performing Gaussian beam simulation at a plurality of exit angles, wherein Gaussian beams of different exit angles are independent of each other; using Gaussian beam integration to superimpose all Gaussian beam fields, andmultiplying the superposition result by a wave function so as to obtain a frequency domain Gaussian beam simulation wave field of space; transforming the frequency domain Gaussian beam simulation wave field into a time domain so as to obtain a wave field propagation snapshot and a single shot record. By applying the invention, a clean and accurate simulated wave field can be obtained; the invention is very suitable for seismic imaging wave field analysis.
Description
technical field [0001] The present invention relates to the field of seismic wave forward modeling, more specifically, to a seismic wave forward modeling method and device based on Gaussian beam wave field simulation. Background technique [0002] One of the main applications of numerical forward modeling of seismic waves is to serve seismic imaging for wave field analysis. Seismic wave field numerical forward modeling for seismic imaging only needs to simulate transmitted waves, and its calculation methods include: acoustic wave equation full wave field finite difference method can deal with complex velocity models but is very time-consuming, and the simulation of the full wave field includes all wave arrivals It makes it difficult to remove unnecessary direct waves, multiple waves, and converted waves, etc.; the one-way wave operator only simulates transmitted waves, which has high efficiency and is suitable for processing large-scale data, but the biggest disadvantage is ...
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IPC IPC(8): G01V1/28
CPCG01V1/282
Inventor 蔡杰雄倪瑶王守进
Owner CHINA PETROLEUM & CHEM CORP