20 found
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  1.  28
    Estimation of Total Organic Carbon and Brittleness Volume.Sumit Verma, Tao Zhao, Kurt J. Marfurt & Deepak Devegowda - 2016 - Interpretation: SEG 4 (3):T373-T385.
    The Barnett Shale in the Fort Worth Basin is one of the most important resource plays in the USA. The total organic carbon and brittleness can help to characterize a resource play to assist in the search for sweet spots. Higher TOC or organic content are generally associated with hydrocarbon storage and with rocks that are ductile in nature. However, brittle rocks are more amenable to fracturing with the fractures faces more resistant to proppant embedment. Productive intervals within a resource (...)
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  2.  39
    Seismic Attenuation Attributes with Applications on Conventional and Unconventional Reservoirs.Fangyu Li, Sumit Verma, Huailai Zhou, Tao Zhao & Kurt J. Marfurt - 2016 - Interpretation: SEG 4 (1):SB63-SB77.
    Seismic attenuation, generally related to the presence of hydrocarbon accumulation, fluid-saturated fractures, and rugosity, is extremely useful for reservoir characterization. The classic constant attenuation estimation model, focusing on intrinsic attenuation, detects the seismic energy loss because of the presence of hydrocarbons, but it works poorly when spectral anomalies exist, due to rugosity, fractures, thin layers, and so on. Instead of trying to adjust the constant attenuation model to such phenomena, we have evaluated a suite of seismic spectral attenuation attributes to (...)
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  3.  42
    Vector Correlation of Amplitude Variation with Azimuth and Curvature in a Post-Hydraulic-Fracture Barnett Shale Survey.Shiguang Guo, Sumit Verma, Qing Wang, Bo Zhang & Kurt J. Marfurt - 2016 - Interpretation: SEG 4 (1):SB23-SB35.
    Knowledge of induced fractures can help to evaluate the success of reservoir stimulation. Seismic P-waves through fracturing media can exhibit azimuthal variation in traveltime, amplitude, and thin-bed tuning, so amplitude variation with azimuth can be used to evaluate the hydraulic-fracturing-caused anisotropy. The Barnett Shale of the Fort Worth Basin was the first large-scale commercial shale gas play. We have analyzed two adjacent Barnett Shale seismic surveys: one acquired before hydraulic fracturing and the other acquired after hydraulic fracturing by more than (...)
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  4.  14
    Multispectral Coherence: Which Decomposition Should We Use?Bin Lyu, Jie Qi, Fangyu Li, Ying Hu, Tao Zhao, Sumit Verma & Kurt J. Marfurt - 2020 - Interpretation 8 (1):T115-T129.
    Seismic coherence is commonly used to delineate structural and stratigraphic discontinuities. We generally use full-bandwidth seismic data to calculate coherence. However, some seismic stratigraphic features may be buried in this full-bandwidth data but can be highlighted by certain spectral components. Due to thin-bed tuning phenomena, discontinuities in a thicker stratigraphic feature may be tuned and thus better delineated at a lower frequency, whereas discontinuities in the thinner units may be tuned and thus better delineated at a higher frequency. Additionally, whether (...)
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  5.  3
    Characterization of Mass Transport Deposits Using Seismic Attributes: Upper Leonard Formation, Permian Basin.Paritosh Bhatnagar, Sumit Verma & Ron Bianco - 2019 - Interpretation 7 (4):SK19-SK32.
    The Permian Basin is a structurally complex sedimentary basin with an extensive history of tectonic deformation. As the basin evolved through time, sediments dispersed into the basin floor from surrounding carbonate platforms leading to various mass movements. One such mass movement is observed on a 3D seismic survey in the Upper Leonard interval of the Midland Basin that is characteristic of a mass transport deposit. The 350 ft thick MTD mapped in the study area is 5 mi wide, extends up (...)
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  6.  23
    Data Conditioning of Legacy Seismic Using Migration-Driven 5D Interpolation.Sumit Verma, Shiguang Guo & Kurt J. Marfurt - 2016 - Interpretation: SEG 4 (2):SG31-SG40.
    Legacy seismic surveys cover much of the midcontinent USA and Texas, with almost all 3D surveys acquired in the 1990s considered today to be low fold. Fortunately, recent advances in 5D interpolation have not only enhanced the quality of structural and stratigraphic images, but they have also improved the data sufficiently to allow more quantitative interpretation, such as impedance inversion. Although normal-moveout-corrected, common-midpoint-based 5D interpolation does an excellent job of amplitude balancing and the suppression of acquisition footprint, it appears to (...)
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  7.  21
    Pitfalls in Seismic Processing: An Application of Seismic Modeling to Investigate Acquisition Footprint.Marcus P. Cahoj, Sumit Verma, Bryce Hutchinson & Kurt J. Marfurt - 2016 - Interpretation: SEG 4 (2):SG1-SG9.
    The term acquisition footprint is commonly used to define patterns in seismic time and horizon slices that are closely correlated to the acquisition geometry. Seismic attributes often exacerbate footprint artifacts and may pose pitfalls to the less experienced interpreter. Although removal of the acquisition footprint is the focus of considerable research, the sources of such artifact acquisition footprint are less commonly discussed or illustrated. Based on real data examples, we have hypothesized possible causes of footprint occurrence and created them through (...)
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  8.  18
    Seismic-Petrophysical Reservoir Characterization in the Northern Part of the Chicontepec Basin, Mexico.Supratik Sarkar, Sumit Verma & Kurt J. Marfurt - 2016 - Interpretation: SEG 4 (3):T403-T417.
    The Chicontepec Formation in east-central Mexico is comprised of complex unconventional reservoirs consisting of low-permeability disconnected turbidite reservoir facies. Hydraulic fracturing increases permeability and joins these otherwise tight reservoirs. We use a recently acquired 3D seismic survey and well control to divide the Chicontepec reservoir interval in the northern part of the basin into five stratigraphic units, equivalent to global third-order seismic sequences. By combining well-log and core information with principles of seismic geomorphology, we are able to map deepwater facies (...)
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  9.  7
    Seismic Attribute and Petrophysics-Assisted Interpretation of the Nanushuk and Torok Formations on the North Slope, Alaska.Shuvajit Bhattacharya & Sumit Verma - 2020 - Interpretation 8 (2):SJ17-SJ34.
    Exploration of the Brookian sandstone reservoirs in the Nanushuk and Torok Formations on the North Slope of Alaska is a hot topic and presents opportunities to the oil and gas community because of their shallow depth, vast extent, and scope of development. The consecutive hydrocarbon discoveries announced by Repsol-Armstrong, Caelus Energy, and ConocoPhillips in 2015, 2016, and 2017 have indicated the presence of the vast recoverable resources on the North Slope in the Nanushuk and Torok reservoirs. We have investigated the (...)
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  10.  9
    Calibration of Attribute Anomalies Through Prestack Seismic Modeling.Sumit Verma, Onur Mutlu, Thang Ha, William Bailey & Kurt J. Marfurt - 2015 - Interpretation: SEG 3 (4):SAC55-SAC70.
    Seismic modeling is commonly used in determining subsurface illumination of alternative seismic survey designs, in the calibration of seismic processing and imaging algorithms, and in the design of effective processing workflows. Seismic modeling also forms the mathematical kernel of impedance inversion and is routinely used to predict the amplitude-variation-with-offset response as a function of rock and fluid properties. However, the use of seismic modeling in seismic attribute studies is less common. We have evaluated four case studies in which 2D synthetic (...)
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  11.  5
    Azimuthal Anisotropy Analysis of Multiazimuth P-Wave Seismic Data — An Example From the Rock Springs Uplift, Wyoming, USA.Hema S. Sharma, Subhashis Mallick, Sumit Verma & Erin Campbell - 2018 - Interpretation: SEG 6 (3):T649-T666.
    Our study area in Rock Sprigs Uplift, Wyoming, lies close to the carbon dioxide -producing Jim Bridger power plant, and hence it is a good site for carbon sequestration. Two subsurface reservoirs within this area are being analyzed for their capability of long-term carbon storage. The presence and orientation of fractures within a reservoir and the associated seal govern the efficiency and long-term effectiveness of [Formula: see text] storage. The presence of natural fractures gives rise to seismic anisotropy that is (...)
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  12.  5
    Pitfalls in Prestack Inversion of Merged Seismic Surveys.Sumit Verma, Yoryenys Del Moro & Kurt J. Marfurt - 2013 - Interpretation: SEG 1 (1):A1-A9.
    Modern 3D seismic surveys are often of such good quality and 3D interpretation packages so user-friendly that seismic interpretation is no longer exclusively carried out by geophysicists. This ease-of-use has also been extended to more quantitative workflows, such as 3D prestack inversion, putting it in the hands of the “nonexpert” — be it geologist, engineer, or new-hire geophysicist. Indeed, given good quality input seismic data, almost any interpreter who can generate good well ties and define an accurate background model of (...)
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  13.  1
    Seismic Response to Paleo-Sand Dunes in the Nugget Sandstone Formation, Southwestern Wyoming.Dhruv Agrawal, Brady Lujan, Sumit Verma, Shuvajit Bhattacharya & Subhashis Mallick - 2020 - Interpretation 8 (4):SR23-SR26.
    We have analyzed a 3D seismic survey acquired for a carbon sequestration project on top of the Moxa Arch in southwestern Wyoming. We observed a zone of discontinuous reflectors on vertical slices of seismic amplitude volume, whereas, the northwest–southeast lineations were observed on the time slices. We performed a seismic to well tie that suggested that the lineations occur within the Nugget Sandstone. The Nugget Sandstone is an eolian sandstone deposit of Early Jurassic age, deposited as a subtropical dune field, (...)
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  14.  4
    Introduction to Special Section: Interesting Features (Aka Funny-Looking Things) Seen on Seismic Data.Heather Bedle, Shuvajit Bhattacharya, Alistair Brown, ChingWen Chen, Lennon Infante-Paez, Kurt Marfurt, Florian Smit, Henry Posementier & Sumit Verma - 2020 - Interpretation 8 (4):SRi-SRii.
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  15. 3D Seismic Imaging of the Submarine Slide Blocks on the North Slope, Alaska.Shuvajit Bhattacharya, Sumit Verma & Jonathan R. Rotzien - 2020 - Interpretation 8 (4):SR37-SR44.
    Submarine landslides are mass movements that transport sediment across the continental shelf to the deep ocean. This phenomenon happens when the shear stress exceeds the frictional resistance of the slope. We analyze a variety of seismic attributes to interpret large submarine slide blocks on the North Slope, Alaska. Results show that the slide blocks appear as mounds with scarps associated with them on the seismic section. The slide blocks vary in size, depending on their distance away from the shelf. The (...)
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  16.  3
    Introduction to Special Section: Alaska — Challenges and Opportunities in the Last Frontier.Shuvajit Bhattacharya, Sumit Verma, Evan Staples, Jacob Mongrain & Bradley Wallet - 2020 - Interpretation 8 (2):SJi-SJi.
    Exploration of the Brookian sandstone reservoirs in the Nanushuk and Torok Formations on the North Slope of Alaska is a hot topic and presents opportunities to the oil and gas community because of their shallow depth, vast extent, and scope of development. The consecutive hydrocarbon discoveries announced by Repsol-Armstrong, Caelus Energy, and ConocoPhillips in 2015, 2016, and 2017 have indicated the presence of the vast recoverable resources on the North Slope in the Nanushuk and Torok reservoirs. We have investigated the (...)
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  17.  1
    Characterization of Organic Content, Brittleness Index, and Geomechanical Properties of the Eocene Cambay Shales — Insights From the Ankleshwar Oil Field in Western India.Shib Sankar Ganguli, Souvik Sen & Sumit Verma - 2021 - Interpretation 9 (1):T235-T252.
    Shale resource assessment involves a detailed characterization of organic and geomechanical parameters for better insights on the reservoir properties and classifying areas of economic yield. To assess the Eocene Younger Cambay Shale Group of the Ankleshwar field, western India, for feasible shale resource play, we have applied a multistage screening methodology that combines an estimation of organic richness, brittleness index, and geomechanical analyses. The estimated thermal maturity and average total-organic-carbon contents are within the range of 0.8–1.0 and 1.8 wt%, respectively. (...)
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  18.  30
    Introduction to Special Section: Multidisciplinary Studies for Geologic and Geophysical Characterization of CO2 Storage Reservoirs.Dario Grana, John Kaszuba, Vladimir Alvarado, Sumit Verma, Manika Prasad & Mary Wheeler - 2017 - Interpretation: SEG 5 (4):SSi-SSii.
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  19. Introduction to Special Section: Permian Basin Challenges and Opportunities.Sumit Verma, Olga Nedorub, Fangyu Li, Tao Zhao, Mohamed Zobaa, Robert Trentham, Ron Bianco & Vikram Jayaram - 2019 - Interpretation 7 (4):SKi-SKi.
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  20.  3
    Introduction to Special Section: Cloud Computing.Bradley Wallet, Konstantin Osypov, Victor Aarre, Sumit Verma, Oswaldo Davogustto, Bo Zhang, Vikram Jayaram & Shuang Zhang - 2021 - Interpretation 9 (1):SAi-SAi.
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