公开(公告)号：US12117581B2

公开(公告)日：2024-10-15

申请号：US17281353

申请日：2019-09-30

Applicant: Schlumberger Technology Corporation

Inventor： Colin Sayers ,  Lennert den Boer

IPC: G01V1/50 ,  E21B49/00

CPC classification number: G01V1/50 ,  E21B49/00 ,  E21B2200/20 ,  G01V2210/1299 ,  G01V2210/1429 ,  G01V2210/6222 ,  G01V2210/6226 ,  G01V2210/6248

Abstract: A method of predicting pore pressure based on seismic data can include obtaining seismic inversion data based in part on seismic data collected from a formation. The method also includes calculating a pore-pressure transform, wherein the pore-pressure transform comprises parameters derived using measured pore pressure data, upscaled sonic logs, and density logs, wherein the pore-pressure transform comprises an objective function to reduce unphysical variations in predicted pore pressure corresponding to depth. Additionally, the method can include adjusting the pore-pressure transform for sampling bias caused by pore pressure measurements being restricted to a plurality of lithologies by accounting for a difference between upscaled seismic velocities and average sonic velocities within each of the lithologies. Furthermore, the method can include generating pore pressure prediction values based on the pore-pressure transform for the lithologies and the seismic inversion data, and modifying a seismic model based on the generated pore pressure prediction values.

公开(公告)号：US20180045559A1

公开(公告)日：2018-02-15

申请号：US15551300

申请日：2016-02-25

Applicant: Schlumberger Technology Corporation

Inventor： Andrew Hawthorn ,  Joel Herve Le Calvez ,  Colin Sayers ,  Jefferson Alford ,  Edward Michael Tollefsen

IPC: G01H9/00 ,  E21B49/00 ,  G01V1/40

CPC classification number: G01H9/004 ,  E21B49/00 ,  G01V1/16 ,  G01V1/40 ,  G01V2210/1425 ,  G01V2210/1429

Abstract: Systems capable of seismically investigating the earth can include seismic sources and a disposable seismic sensor such as a fiber optic seismic sensor included within a drill string. The fiber optic seismic sensor can include a plurality of fiber Bragg gratings. Related methods can include using the seismic sources and the fiber optic seismic sensor to conduct seismic investigations.