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Title: Confining system integrity assessment by detection of natural gas migration using seismic diffractions [Seismic diffractions for gas leakage detection in the shallow waters of the Gulf of Mexico]

Abstract

Successful carbon capture and storage (CCS) requires secure CO 2 confinement within a geologic reservoir. If associated with a depleted hydrocarbon reservoir, the sealing capability can be determined by examination of the shallow subsurface for hydrocarbon leaks. Numerous seismic signatures have been reported to be hydrocarbon indicators. The interpretation can be advanced by using seismic diffractions, which could indicate subtle hydrocarbon accumulations not detectable by conventional techniques. In this work, we investigate the potential of seismic diffractions for use in shallow gas detection. We extract diffractions from the ultra-high-resolution 3D P-Cable seismic dataset acquired along the Gulf of Mexico inner continental shelf. Interpretation of this dataset revealed numerous seismic signatures associated with hydrocarbon accumulations (e.g., a prominent gas chimney). We analyze scattering features of the detected hydrocarbon accumulations and confirm the correlation between confidently interpreted gas accumulations and seismic diffractions. Based on that, we suggest using diffractions for confining system integrity assessment. As a result, diffraction analysis allows operating with subtle seismic signals that facilitates exploration of reliable CO 2 storage sites.

Authors:
 [1];  [1];  [1]
  1. The Univ. of Texas at Austin, Austin, TX (United States)
Publication Date:
Research Org.:
The Univ. of Texas at Austin, Austin, TX (United States)
Sponsoring Org.:
USDOE Office of Fossil Energy (FE)
OSTI Identifier:
1496214
Grant/Contract Number:  
FE0026083
Resource Type:
Accepted Manuscript
Journal Name:
International Journal of Greenhouse Gas Control
Additional Journal Information:
Journal Volume: 75; Journal Issue: C; Related Information: Meckel, Timothy, et al., (2018), Processed 3D multichannel seismic data from the San Luis Pass region off Galveston, Texas, acquired by the R/V Brooks-McCall in 2013 (BM1310). Interdisciplinary Earth Data Alliance (IEDA).Using a P-Cable system, this 2013 R/V Brooks-McCall survey collected 96-channel short offset 3D seismic data in the San Luis Pass offshore southern Galveston Island, Texas. The cruise was part of an effort to identifiy potential carbon dioxide storage sites offshore Texas in the Gulf of Mexico. Funded by the U.S. Department of Energy (Award DE-FE0001941).; Journal ID: ISSN 1750-5836
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; Seismic; Interpretation; Diffraction; Faults; Fractures; Confining system

Citation Formats

Klokov, Alexander, Meckel, Timothy A., and Treviño, Ramón H. Confining system integrity assessment by detection of natural gas migration using seismic diffractions [Seismic diffractions for gas leakage detection in the shallow waters of the Gulf of Mexico]. United States: N. p., 2018. Web. doi:10.1016/j.ijggc.2018.05.001.
Klokov, Alexander, Meckel, Timothy A., & Treviño, Ramón H. Confining system integrity assessment by detection of natural gas migration using seismic diffractions [Seismic diffractions for gas leakage detection in the shallow waters of the Gulf of Mexico]. United States. doi:10.1016/j.ijggc.2018.05.001.
Klokov, Alexander, Meckel, Timothy A., and Treviño, Ramón H. Sun . "Confining system integrity assessment by detection of natural gas migration using seismic diffractions [Seismic diffractions for gas leakage detection in the shallow waters of the Gulf of Mexico]". United States. doi:10.1016/j.ijggc.2018.05.001. https://www.osti.gov/servlets/purl/1496214.
@article{osti_1496214,
title = {Confining system integrity assessment by detection of natural gas migration using seismic diffractions [Seismic diffractions for gas leakage detection in the shallow waters of the Gulf of Mexico]},
author = {Klokov, Alexander and Meckel, Timothy A. and Treviño, Ramón H.},
abstractNote = {Successful carbon capture and storage (CCS) requires secure CO2 confinement within a geologic reservoir. If associated with a depleted hydrocarbon reservoir, the sealing capability can be determined by examination of the shallow subsurface for hydrocarbon leaks. Numerous seismic signatures have been reported to be hydrocarbon indicators. The interpretation can be advanced by using seismic diffractions, which could indicate subtle hydrocarbon accumulations not detectable by conventional techniques. In this work, we investigate the potential of seismic diffractions for use in shallow gas detection. We extract diffractions from the ultra-high-resolution 3D P-Cable seismic dataset acquired along the Gulf of Mexico inner continental shelf. Interpretation of this dataset revealed numerous seismic signatures associated with hydrocarbon accumulations (e.g., a prominent gas chimney). We analyze scattering features of the detected hydrocarbon accumulations and confirm the correlation between confidently interpreted gas accumulations and seismic diffractions. Based on that, we suggest using diffractions for confining system integrity assessment. As a result, diffraction analysis allows operating with subtle seismic signals that facilitates exploration of reliable CO2 storage sites.},
doi = {10.1016/j.ijggc.2018.05.001},
journal = {International Journal of Greenhouse Gas Control},
number = C,
volume = 75,
place = {United States},
year = {2018},
month = {5}
}

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