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Seismic reservoir characterization of Utica-Point Pleasant shale with efforts at fracability evaluation; Part 2, A case study

Ritesh Kumar Sharma, Satinder Chopra, James Keay, Hossein Nemati and Larry R. Lines
Seismic reservoir characterization of Utica-Point Pleasant shale with efforts at fracability evaluation; Part 2, A case study
Interpretation (Tulsa) (May 2018) 6 (2): T325-T336

Abstract

The Utica Formation in eastern Ohio possesses all the prerequisites for being a successful unconventional play. Attempts at seismic reservoir characterization of the Utica Formation have been discussed in part 1, in which, after providing the geologic background of the area of study, the preconditioning of prestack seismic data, well-log correlation, and building of robust low-frequency models for prestack simultaneous impedance inversion were explained. All these efforts were aimed at identification of sweet spots in the Utica Formation in terms of organic richness as well as brittleness. We elaborate on some aspects of that exercise, such as the challenges we faced in the determination of the total organic carbon (TOC) volume and computation of brittleness indices based on mineralogical and geomechanical considerations. The prediction of TOC in the Utica play using a methodology, in which limited seismic as well as well-log data are available, is demonstrated first. Thereafter, knowing the nonexistence of the universally accepted indicator of brittleness, mechanical along with mineralogical attempts to extract the brittleness information for the Utica play are discussed. Although an attempt is made to determine brittleness from mechanical rock-physics parameters (Young's modulus and Poisson's ratio) derived from seismic data, the available X-ray diffraction data and regional petrophysical modeling make it possible to determine the brittleness index based on mineralogical data and thereafter be derived from seismic data.


ISSN: 2324-8858
EISSN: 2324-8866
Serial Title: Interpretation (Tulsa)
Serial Volume: 6
Serial Issue: 2
Title: Seismic reservoir characterization of Utica-Point Pleasant shale with efforts at fracability evaluation; Part 2, A case study
Affiliation: TGS, Calgary, AB, Canada
Pages: T325-T336
Published: 201805
Text Language: English
Publisher: Society of Exploration Geophysicists, Tulsa, OK, United States
References: 16
Accession Number: 2019-006591
Categories: Economic geology, geology of energy sourcesApplied geophysics
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sects., geol. sketch maps
N39°45'00" - N40°40'00", W81°40'00" - W81°00'00"
Secondary Affiliation: University of Calgary, CAN, Canada
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, 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: 201906
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