Spectral decomposition aids AVO analysis in reservoir characterization

A case study of Blackfoot field, Alberta, Canada

Wang Jung Yoon, Mohammed Farfour

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Blackfoot field, Alberta, Canada, has produced oil and gas from a Glauconitic compound incised valley-system. In this area channels can be filled with sands and/or shales. Differentiation of prospective channel sands and non-productive shales was always problematic due to the similarity in P-wave impedance of these two lithotypes. We study the spectral decomposition response to the hydrocarbons presence in the Glauconitic channel of Early Cretaceous age. From previous AVO analysis and modeling, a strong Class III AVO anomaly has been observed at the top of the porous sandstone in the upper valley, whereas shale had a very different AVO response. Furthermore, AVO inversion revealed additional information about lithology and fluid content in the channel. Our workflow starts from selecting a continuous horizon that was close and conforms to the channel interval; we then run spectral analyses for the channel area. Short Window Fourier Transform workflow could successfully image the channel's stratigraphic features and confirm results obtained from AVO analysis and inversion run on the data before being stacked. Additionally, the producing oil wells in the sand-fill channel were found to be correlating with high spectrum amplitude; while the dry wells in the shale-plugged channel fell in low amplitude anomaly.

Original languageEnglish
Pages (from-to)60-65
Number of pages6
JournalComputers and Geosciences
Volume46
DOIs
Publication statusPublished - Sep 2012

Fingerprint

reservoir characterization
Sand
decomposition
Shale
Decomposition
Oil wells
Lithology
Sandstone
Fourier transforms
Hydrocarbons
sand
Fluids
shale
Gases
stratigraphic feature
anomaly
analysis
lithotype
incised valley
oil well

Keywords

  • Amplitude anomaly
  • Fluid
  • Lithology
  • Sand
  • Spectral decomposition

ASJC Scopus subject areas

  • Information Systems
  • Computers in Earth Sciences

Cite this

@article{63bc6a0d72284fe085c502e1a149ef7f,
title = "Spectral decomposition aids AVO analysis in reservoir characterization: A case study of Blackfoot field, Alberta, Canada",
abstract = "Blackfoot field, Alberta, Canada, has produced oil and gas from a Glauconitic compound incised valley-system. In this area channels can be filled with sands and/or shales. Differentiation of prospective channel sands and non-productive shales was always problematic due to the similarity in P-wave impedance of these two lithotypes. We study the spectral decomposition response to the hydrocarbons presence in the Glauconitic channel of Early Cretaceous age. From previous AVO analysis and modeling, a strong Class III AVO anomaly has been observed at the top of the porous sandstone in the upper valley, whereas shale had a very different AVO response. Furthermore, AVO inversion revealed additional information about lithology and fluid content in the channel. Our workflow starts from selecting a continuous horizon that was close and conforms to the channel interval; we then run spectral analyses for the channel area. Short Window Fourier Transform workflow could successfully image the channel's stratigraphic features and confirm results obtained from AVO analysis and inversion run on the data before being stacked. Additionally, the producing oil wells in the sand-fill channel were found to be correlating with high spectrum amplitude; while the dry wells in the shale-plugged channel fell in low amplitude anomaly.",
keywords = "Amplitude anomaly, Fluid, Lithology, Sand, Spectral decomposition",
author = "{Jung Yoon}, Wang and Mohammed Farfour",
year = "2012",
month = "9",
doi = "10.1016/j.cageo.2012.04.012",
language = "English",
volume = "46",
pages = "60--65",
journal = "Computers and Geosciences",
issn = "0098-3004",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Spectral decomposition aids AVO analysis in reservoir characterization

T2 - A case study of Blackfoot field, Alberta, Canada

AU - Jung Yoon, Wang

AU - Farfour, Mohammed

PY - 2012/9

Y1 - 2012/9

N2 - Blackfoot field, Alberta, Canada, has produced oil and gas from a Glauconitic compound incised valley-system. In this area channels can be filled with sands and/or shales. Differentiation of prospective channel sands and non-productive shales was always problematic due to the similarity in P-wave impedance of these two lithotypes. We study the spectral decomposition response to the hydrocarbons presence in the Glauconitic channel of Early Cretaceous age. From previous AVO analysis and modeling, a strong Class III AVO anomaly has been observed at the top of the porous sandstone in the upper valley, whereas shale had a very different AVO response. Furthermore, AVO inversion revealed additional information about lithology and fluid content in the channel. Our workflow starts from selecting a continuous horizon that was close and conforms to the channel interval; we then run spectral analyses for the channel area. Short Window Fourier Transform workflow could successfully image the channel's stratigraphic features and confirm results obtained from AVO analysis and inversion run on the data before being stacked. Additionally, the producing oil wells in the sand-fill channel were found to be correlating with high spectrum amplitude; while the dry wells in the shale-plugged channel fell in low amplitude anomaly.

AB - Blackfoot field, Alberta, Canada, has produced oil and gas from a Glauconitic compound incised valley-system. In this area channels can be filled with sands and/or shales. Differentiation of prospective channel sands and non-productive shales was always problematic due to the similarity in P-wave impedance of these two lithotypes. We study the spectral decomposition response to the hydrocarbons presence in the Glauconitic channel of Early Cretaceous age. From previous AVO analysis and modeling, a strong Class III AVO anomaly has been observed at the top of the porous sandstone in the upper valley, whereas shale had a very different AVO response. Furthermore, AVO inversion revealed additional information about lithology and fluid content in the channel. Our workflow starts from selecting a continuous horizon that was close and conforms to the channel interval; we then run spectral analyses for the channel area. Short Window Fourier Transform workflow could successfully image the channel's stratigraphic features and confirm results obtained from AVO analysis and inversion run on the data before being stacked. Additionally, the producing oil wells in the sand-fill channel were found to be correlating with high spectrum amplitude; while the dry wells in the shale-plugged channel fell in low amplitude anomaly.

KW - Amplitude anomaly

KW - Fluid

KW - Lithology

KW - Sand

KW - Spectral decomposition

UR - http://www.scopus.com/inward/record.url?scp=84863433045&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84863433045&partnerID=8YFLogxK

U2 - 10.1016/j.cageo.2012.04.012

DO - 10.1016/j.cageo.2012.04.012

M3 - Article

VL - 46

SP - 60

EP - 65

JO - Computers and Geosciences

JF - Computers and Geosciences

SN - 0098-3004

ER -