TY - JOUR

T1 - Correcting for non-repeatable source signatures in 4D seismic with buried receivers

T2 - SEG New Orleans Annual Meeting, SEG 2015

AU - Alexandrov, Dmitry

AU - Bakulin, Andrey

AU - Van Der Neut, Joost

AU - Kashtan, Boris

PY - 2015/1/1

Y1 - 2015/1/1

N2 - Virtual source redatuming is an effective way for improving repeatability of onshore seismic data acquired with buried receivers that can suffer from near-surface variations and acquisition geometry changes. However, redatuming is less effective in correcting for amplitude variations of the downgoing wavefield caused by variable source signatures, coupling or other factors. We present an improved redatuming workflow, which has the benefits of the virtual source approach and corrects for additional nonrepeatability of the downgoing wavefield between surveys. The method involves construction of the virtual source gather for each survey, deconvolution with the corresponding point spread-function (PSF) and convolving with a reference PSF. Here we employ a reference PSF computed for a homogeneous replacement near surface. This reduces imaging artifacts and provides additional control over the dominant frequency of the output data. We demonstrate a significant repeatability improvement using a field 4D multi-survey onshore dataset from Saudi Arabia.

AB - Virtual source redatuming is an effective way for improving repeatability of onshore seismic data acquired with buried receivers that can suffer from near-surface variations and acquisition geometry changes. However, redatuming is less effective in correcting for amplitude variations of the downgoing wavefield caused by variable source signatures, coupling or other factors. We present an improved redatuming workflow, which has the benefits of the virtual source approach and corrects for additional nonrepeatability of the downgoing wavefield between surveys. The method involves construction of the virtual source gather for each survey, deconvolution with the corresponding point spread-function (PSF) and convolving with a reference PSF. Here we employ a reference PSF computed for a homogeneous replacement near surface. This reduces imaging artifacts and provides additional control over the dominant frequency of the output data. We demonstrate a significant repeatability improvement using a field 4D multi-survey onshore dataset from Saudi Arabia.

UR - http://www.scopus.com/inward/record.url?scp=85019004321&partnerID=8YFLogxK

U2 - 10.1190/segam2015-5890959.1

DO - 10.1190/segam2015-5890959.1

M3 - Conference article

AN - SCOPUS:85019004321

VL - 34

SP - 5343

EP - 5347

JO - SEG Technical Program Expanded Abstracts

JF - SEG Technical Program Expanded Abstracts

SN - 1052-3812

Y2 - 18 October 2011 through 23 October 2011

ER -