Inclination angle domain common imaging point gather calculating method and computer readable storage medium

Abstract

The invention discloses an inclination angle domain common imaging point gather calculating method and a computer readable storage medium. The method comprises the following steps of step1, based on acommon center point gather, extracting an imaging point and acquiring seismic ray travel time data and seismic ray path data corresponding to the imaging point; step2, based on the seismic ray traveltime data and the seismic ray path data, acquiring a first included angle between an incident ray and a plumb line and a second included angle between a reflected line and the plumb line; step3, based on the first included angle and the second included angle, acquiring an incident angle and then acquiring an inclination angle; step4, based on the inclination angle, extracting energy correspondingto the imaging point; and step5, aiming at each imaging point of the common center point gather, repeating the step1 to step4, and acquiring an inclination angle domain common imaging point gather. In the invention, through a seismic migration method, the inclination angle can be directly calculated; and during migration, pre-stack gather energy can be directly homing to the inclination angle domain common imaging point gather, and a true stratum inclination angle and the exact homing point of an energy value can be calculated.

Description

technical field [0001] The present invention relates to the technical field of oil and gas geophysics, and more specifically, to a method for obtaining a common imaging point gather in a dip domain and a computer-readable storage medium. Background technique [0002] One of the cores of seismic imaging calculation is to accurately obtain various common imaging point gathers (Audebert, 2002). For a long time, reflected energy has been a research hotspot in the industry. Common applications include stacked imaging using reflection angle common imaging point gathers, migration velocity analysis, amplitude attribute analysis, and fracture reservoir characteristic analysis. [0003] In recent years, with the advancement of technology, the emergence of the calculation method of dip-domain common image point gather (DDCIG) has made new progress in the utilization of diffracted wave energy. The theory of common imaging point gathers in the dip domain does not make limited assumptio...

AI Technical Summary

Problems solved by technology

Most of these studies have been carried out in the depth domain for many years, but the speed modeling in the necessary steps of depth domain imaging is very expensive, the calculation efficiency is low, and it is difficult to obtain it accurately (Wang Huazhong et al., 2012)

Images