公开(公告)号：US20190277993A1

公开(公告)日：2019-09-12

申请号：US16264662

申请日：2019-01-31

Applicant: Chengdu University of Technology

Inventor： Xuehua CHEN ,  Shuaishuai JIANG ,  Jie ZHANG ,  Wei JIANG ,  Bingnan LV

IPC: G01V1/50

Abstract: A method for estimating the depth-domain seismic wavelets from depth-domain seismic data and synthesizing depth-domain seismic records. The method includes: obtaining depth coordinates and P-wave velocity v and density from well log, calculating a corresponding reflectivity series r; performing constant-velocity depth conversion for a seismic trace S and a reflectivity series r by using a velocity v, as a reference velocity to obtain the converted seismic trace S1 and the converted reflectivity series r1; and estimating a depth-domain seismic wavelet w based on the Gibbs sampling method; synthesizing depth-domain seismic record by using the P-wave v, the reflectivity series r and the estimated depth-domain seismic wavelet w.

公开(公告)号：US20230258839A1

公开(公告)日：2023-08-17

申请号：US18164583

申请日：2023-02-04

Applicant: Chengdu University of Technology

Inventor： Jie ZHANG ,  Xuehua CHEN ,  Wei JIANG ,  Bingnan LV ,  Junjie LIU ,  Xiaomin JIANG

IPC: G01V1/50 ,  G01V1/28

CPC classification number: G01V1/50 ,  G01V1/282

Abstract: A direct well-tie method for depth-domain logging and seismic data, including: removing null and outlier values from logging velocity data and logging density data to obtain valid logging velocity data and valid logging density data; calculating a logging reflection coefficient; estimating an initial zero-phase depth-domain seismic wavelet from seismic section; making a depth-domain synthetic seismogram; interpolating the depth-domain seismogram at the logging location; performing cross-correlating operation between the depth-domain synthetic seismogram and the interpolated depth-domain seismogram at the logging location; estimating a depth-domain seismic wavelet; updating the depth-domain synthetic seismogram; generating a corresponding depth deviation point set; subjecting elements in the set to interpolation to obtain a depth calibration curve; subjecting the depth calibration curve and depth axis to addition to obtain depth axis; generating a logging depth-seismic depth corresponding relationship and a depth-domain seismic wavelet.