Skip to Main Content
Skip Nav Destination
GEOREF RECORD

pQC; a novel approach for robust automatic near-surface analysis in low-relief geology

Daniele Colombo, Federico Miorelli, Ernesto Sandoval-Curiel and Diego Rovetta
pQC; a novel approach for robust automatic near-surface analysis in low-relief geology (in Near-surface modeling and imaging, Ralph Bridle (prefacer))
Leading Edge (Tulsa, OK) (November 2016) 35 (11): 952-960

Abstract

A novel approach, named pQC, was developed to automatically derive near-surface velocities and statics by applying surface-consistent analysis to refraction data, where the data consist of first-break (FB) traveltimes and early-arrival waveforms. This approach is facilitated by the introduction of a new sorting domain in which FB traveltimes and traces are organized in a multidimensional space consisting of a common-midpoint (CMP) location, offset, and azimuth, called the XYOA domain. The FB traveltime data sorted in this domain can be analyzed efficiently with statistical methods to obtain localized average depth domain velocity trends for calculation of long-wavelength statics. Short-wavelength (residual) refraction statics are then calculated based on the cross correlation of early-arrival waveforms in the XYOA gathers over multiple offset classes and inverted for surface-consistent source and receiver corrections. The application of the combined statics solution to the traces enhances the continuity and power of the stacked reflected events without the need to perform tomography. Surface-consistent analysis of refraction data in the XYOA domain is fully automatic, provides robust solutions for noisy data, and enhances subsequent reflection residual statics calculations. This method can also be exploited for quality-control analysis of FB picks and for automating, in an iterative procedure, the picking of large 3D seismic data sets. The method is demonstrated on a 3D land survey over complex geology where the novel refraction surface-consistent solution enhances the imaging results and employs a fraction of the time needed by a typical tomographic workflow.


ISSN: 1070-485X
EISSN: 1938-3789
Serial Title: Leading Edge (Tulsa, OK)
Serial Volume: 35
Serial Issue: 11
Title: pQC; a novel approach for robust automatic near-surface analysis in low-relief geology
Title: Near-surface modeling and imaging
Affiliation: Saudi Aramco, Exploration and Petroleum Engineering Center Advanced Research Center, Saudi Arabia
Affiliation: Saudi Aramco, Saudi Arabia
Pages: 952-960
Published: 201611
Text Language: English
Publisher: Society of Exploration Geophysicists, Tulsa, OK, United States
References: 14
Accession Number: 2017-001309
Categories: Applied geophysics
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by Society of Exploration Geophysicists, Tulsa, OK, United States
Update Code: 201701
Close Modal

or Create an Account

Close Modal
Close Modal