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The Leading Edge
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Disponibilidad
Institución detectada | Período | Navegá | Descargá | Solicitá |
---|---|---|---|---|
No detectada | desde ene. 1993 / hasta dic. 2023 | GeoScienceWorld |
Información
Tipo de recurso:
revistas
ISSN impreso
1070-485X
ISSN electrónico
1938-3789
País de edición
Estados Unidos
Fecha de publicación
1993-
Cobertura temática
Tabla de contenidos
Anisotropy and petrophysics of Floyd Shale, Alabama
Carl H. Sondergeld; Chandra S. Rai
<jats:p> Floyd Shale has a measured anisotropy that is consistent with transverse isotropy but with a magnitude of nearly 40% in Thomsen parameters γ and ε. The measured anisotropy is very strong, with a relation between γ and ε but not δ. This requires incorporating strong anisotropy while locating any microseismic events induced during fracture stimulation. It makes velocities deduced from sonic logs in deviated wellbores considerably different than vertical velocities. Floyd Shale looks very similar to Barnett Shale in many of its petrophysical properties except mineralogy. Production to date has been disappointing. We review key petrophysical and rock-physics properties of 103 ft of Floyd Shale recovered from the McShan Timberlands well. Based on these analyses, Floyd looks very promising (i.e., total organic carbon is in excess of 4 wt%, and porosities average 6%). However, mineralogy is dominated by clays (typically greater than 50 wt%), and Barnett has generally less than 29% clay. High-pressure mercury injection capillary pressure and nuclear magnetic resonance indicate that pore throats and pore bodies are small (i.e., less than 15 nm). Physical inspection of the recovered core reveals fresh slickensides (i.e., evidence of hydraulic fracturing) and compromised calcite-filled fractures. If this core is representative of Floyd Shale, we suspect that any hydrocarbons generated during maturation likely migrated during later tectonic fracturing. </jats:p>
Palabras clave: Geology; Geophysics.
Pp. 487-491
Amplitude preservation and seismic inversion reliability post spectral shaping
Waskito Pranowo; Ida Herawati
<jats:p> Resolution enhancement is often applied to poststack seismic data to obtain higher frequency or wider frequency bandwidth. This enhancement could help seismic interpreters in resolving thinner layers that may not be visible on the original seismic data. The seismic inversion method is the other way to interpret seismic data. The inversion process produces an impedance volume as a layer property that can be used not only for interpretation but also for reservoir characterization. This research aims to study whether vertical resolution enhancement of seismic data preserves the amplitudes and how enhancement affects seismic inversion results. The experiments in this research are performed on synthetic and real data. The modeling is carried out by generating zero-offset synthetic traces using a convolutional model. Meanwhile, real data processing is carried out at the North Sea Volve Data Village at the Ty and Hugin formations. The resolution of the seismic trace is enhanced using a spectral division operator. The inversion techniques used in this research are model-based inversion and sparse spike inversion. The seismic trace after vertical resolution enhancement shows that the separation of events can be improved by this procedure. Inversion of the original and of the enhanced traces shows that the enhancement process still allows obtaining reliable inversion results both from model-based and sparse spike methods; however, there is no significant difference between the inverted impedance using the original trace and enhanced traces. This research concludes that the enhancement process keeps the seismic amplitude preserved for inversion, but it barely improves the inversion result. </jats:p>
Palabras clave: Geology; Geophysics.
Pp. 492-501
Symposium Review: 3rd International Geomechanics Symposium gathers experts from around the world
Mohammed Badri; Gang Han; Nasher AlBinhassan
<jats:p> The 3rd International Geomechanics Symposium (IGS2022) took place 7–10 November 2022 in Abu Dhabi. Focusing on the role of geomechanics in energy efficiency and sustainability, the technical program covered a range of technology applications including rock and in-situ stress characterization, natural fractures, faults, drilling, completion, stimulation, production, and reservoir engineering. It also showcased geomechanics applications in CO<jats:sub>2</jats:sub> sequestration, hydrogen storage, and new energies. </jats:p>
Palabras clave: Geology; Geophysics.
Pp. 502-505
Workshop Review: Recent workshop explores near-surface modeling and imaging
Moosa Al-Jahdhami; Abdullatif Al-Shuhail
<jats:p> Modeling of the near surface plays a significant role in subsurface imaging, reservoir characterization, and monitoring. The Near-Surface Modeling and Imaging Workshop was created to address near-surface challenges in geoscience. The workshop has been held previously in 2014, 2016, and 2019. The latest instance of the workshop, 27–29 September 2022 in Muscat, Oman, continued the tradition. </jats:p>
Palabras clave: Geology; Geophysics.
Pp. 506-509
Reviews
Julie Aitken
<jats:p> Integration of Geophysical Technologies in the Petroleum Industry, edited by Hamish Wilson, Keith Nunn, and Matt Luheshi, 2022. </jats:p>
Palabras clave: Geology; Geophysics.
Pp. 510-510
Board Report
<jats:p> SEG Board of Directors and Executive Committee actions from February to April 2023. </jats:p>
Palabras clave: Geology; Geophysics.
Pp. 512-512
Membership
<jats:p> Applications for Active membership have been received from the candidates listed herein. </jats:p>
Palabras clave: Geology; Geophysics.
Pp. 513-513
Meetings Calendar
<jats:p> The Meetings Calendar chronologically lists professional events of interest to SEG members and means by which further information can be obtained. </jats:p>
Palabras clave: Geology; Geophysics.
Pp. 514-514
Seismic Soundoff: The future outlook of SEG and applied geophysics
Andrew Geary
<jats:p> SEG President Ken Tubman discusses the future outlook of SEG and applied geophysics. He outlines how SEG could allow greater experimentation, the pros and cons of its current governance structure, and how members can best contribute to SEG's future. </jats:p>
Palabras clave: Geology; Geophysics.
Pp. 516-516
Editorial Calendar
<jats:p> The Editorial Calendar details upcoming publication plans for The Leading Edge. This includes special sections, guest editors, and information about submitting articles to TLE. </jats:p>
Palabras clave: Geology; Geophysics.
Pp. 522-522