公开(公告)号：US20190219715A1

公开(公告)日：2019-07-18

申请号：US15989450

申请日：2018-05-25

Applicant: CGG SERVICES SAS

Inventor： Robert SOUBARAS

IPC: G01V1/28 ,  G01V1/30

Abstract: A method for exploring a geological formation estimates a multiple-inclusive source wavelet and a reflectivity model by performing an inversion minimizing the difference between the shot records and modeled shots. The modeled shots, that include primaries and multiples, are obtained by propagating up-going and down-going wavefields through an input velocity model, which is not updated during the inversion. The shot records are converted into a geological product suitable for hydrocarbon exploration in the geological formation using the multiple-inclusive source wavelet and the reflectivity model.

公开(公告)号：US20180017692A1

公开(公告)日：2018-01-18

申请号：US15627547

申请日：2017-06-20

Applicant: CGG SERVICES SAS

Inventor： Robert SOUBARAS

IPC: G01V1/30 ,  G01V1/28 ,  G01V1/36

CPC classification number: G01V1/306 ,  G01V1/282 ,  G01V1/307 ,  G01V1/362 ,  G01V2210/512 ,  G01V2210/614 ,  G01V2210/6169 ,  G01V2210/6224 ,  G01V2210/6226 ,  G01V2210/624 ,  G01V2210/632

Abstract: Computing device, computer instructions and method for calculating a characteristic of the earth based on recorded seismic data related to a subsurface. The method includes receiving well log data; calculating a statistical model based on the well log data; calculating a reflectivity R of the subsurface based on an intercept A and a gradient B of the statistical model; calculating a reconstructed gather D based on the reflectivity R and a wavelet model W; calculating parameters wn of the wavelet model W with a first inversion function C that depends on (i) the reconstructed gather D, (ii) a recorded gather D0, and (iii) a probability density function (pdf) associated with the statistical model; and calculating the characteristic of the earth for the subsurface, based on the parameters wn of the wavelet model W and the recorded gather D0.