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Comparison of shale depth functions in contrasting offshore basins and sealing behaviour for CH4 and CO2 containment systems Pet. Geosci. (IF 1.7) Pub Date : 2022-06-27 Oscar J. Nhabanga, Philip S. Ringrose
Mudrock compaction trends from the Rovuma Basin offshore Mozambique are compared with those of the Norwegian North Sea, the Gulf of Mexico and the Kutai Basin offshore Indonesia. The comparison reveals that burial rates and timing of rifting are the dominant causes for the differences observed. The compaction trend for the Rovuma Basin is broadly similar to the trends for the Kutai Basin and the Gulf
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Stress state in parts of NE India: borehole collapse modelling with sensitivity analysis Pet. Geosci. (IF 1.7) Pub Date : 2022-06-13 Jenifer Alam, Rima Chatterjee, Sohini Dasgupta, Baisakhi Das
Structural heterogeneities and tectonic forces in NE India give rise to changeable in situ stresses with varying orientations in this part of India. Wells located in the seismic gap in Upper Assam, the Naga Thrust and the Chittagong–Mizoram–Tripura fold belt of Mizoram are used to study stress state and borehole collapse models for the area. The absence of stress studies in the Mizoram area acts as
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The role of creep in geopressure development Pet. Geosci. (IF 1.7) Pub Date : 2022-05-05 Kehua You, Peter Flemings, Athma R. Bhandari, Mahdi Heidari, John Germaine
This study developed a one-dimensional numerical model of sedimentation and compaction based on the equivalent isochrone framework to investigate the impact of creep on geopressure during burial. In this framework, the void ratio is a function of effective stress and strain rate; the change in void ratio is the same with each order of magnitude decrease in strain rate at a constant effective stress
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Petrographic and diagenetic investigation of the distal Triassic 'Budleighensis fluvial system in the Solway and Carlisle Basins for potential CO2 storage Pet. Geosci. (IF 1.7) Pub Date : 2022-04-25 J. R. Marsh, S. J. Jones, N. S. Meadows, J. G. Gluyas
Failure to find hydrocarbon prospects in the Solway Basin region has resulted in a lack of research into the local Sherwood Sandstone Group petrography, reservoir quality and depositional history compared to the analogous southern reservoirs in the EISB which will be utilized for carbon storage. A detailed petrographic study is presented which aims to understand if the Solway Firth could have similar
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The design of an open-source carbonate reservoir model Pet. Geosci. (IF 1.7) Pub Date : 2022-04-21 Jorge Costa Gomes, Sebastian Geiger, Daniel Arnold
This work presents a new open-source carbonate reservoir case study, the COSTA model, that uniquely considers significant uncertainties inherent to carbonate reservoirs, providing a far more challenging and realistic benchmarking test for a range of geo-energy applications. The COSTA field is large, with many wells and large associated volumes. The dataset embeds many interacting geological and petrophysical
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Generation and estimation of overpressure from wireline logs using deterministic approaches in western Indonesia's Tertiary sedimentary basins Pet. Geosci. (IF 1.7) Pub Date : 2022-04-21 Agus M. Ramdhan, Stephen O'Connor
Many basins in Indonesia such as the North Sumatra, South Sumatra and Lower Kutai are highly overpressured. As a result, some wells have experienced drilling problems resulting in termination. In the literature, an empirical relationship such as Eaton has historically often been used to interpret pore pressure. In this paper, we take an alternative approach, one based on deterministic models. Herein
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Investigating the role of differential biotic production on carbonate geometries through stratigraphic forward modelling and sensitivity analysis: the Llucmajor example Pet. Geosci. (IF 1.7) Pub Date : 2022-04-04 Timothy O. Tella, Gerd Winterleitner, Maria Mutti
The geometry of carbonate platforms reflects the interaction of several factors. However, the impact of carbonate-producing organisms has been poorly investigated so far. This study applies stratigraphic forward modelling (SFM) and sensitivity analysis to examine, referenced to the Miocene Llucmajor Platform, the effect of changes of dominant biotic production in the oligophotic and euphotic zones
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Clumped isotope constraints on the origins of reservoir methane from the Barents Sea Pet. Geosci. (IF 1.7) Pub Date : 2022-04-04 Nivedita Thiagarajan, Jon Halvard Pedersen, Harald Brunstad, Joachim Rinna, Aivo Lepland, John Eiler
The Barents Sea basin is an oil and gas province containing more than 760 million tons of oil equivalents. The reservoir geology of the Barents Sea is complex due to multiple episodes of subsidence, uplift and erosion, which opened a network of extensional and wrench related faults allowing for fluid migration. The multifaceted geological history complicates efforts to describe the source and characteristics
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Interaction between volcanic and non-volcanic systems and its implication for prospectivity in the Faroe-Shetland Basin, NE Atlantic continental margin Pet. Geosci. (IF 1.7) Pub Date : 2022-03-31 Heri Ziska, Uni Árting, Morten S. Riishuus
Exploration in the Faroe–Shetland Basin on the Faroese Continental Shelf has revealed thick and complex volcanic successions and discovery of inter-volcanic oil-bearing siliciclastic sandstone fan deposits in the central parts of the basin. The possibility for such play types at the fringe of the North Atlantic Igneous Province requires a better understanding of the interaction between competing sedimentary
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Kicks and their significance in pore pressure prediction Pet. Geosci. (IF 1.7) Pub Date : 2022-03-21 Jack Lee, Richard Swarbrick, Stephen O'Connor
Knowledge of subsurface formation pressures is critical for the calibration of predictions and models needed for safe drilling of deep wells, historically for oil and gas wells. The same details apply to the sequestration of CO2, ephemeral storage of gases such as hydrogen and for geothermal power. An estimated 10–14% of wells globally experience an unexpected influx of formation fluid, indicative
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The impact of clay fraction on the strength and stress ratio (K0) in Gulf of Mexico mudrocks and quartz silt mixtures: implications for borehole stability and fracture gradient Pet. Geosci. (IF 1.7) Pub Date : 2022-03-16 Mark Zablocki, John T. Germaine, Richard Plumb, Peter B. Flemings
Mudrock strength parameters are required to improve the prediction of fracture gradient during drilling in poorly consolidated formations. Understanding the influence that mineral composition and consolidation stress have on the mechanical properties of mudrocks aids safe well design. Small changes in the mudrock clay content are shown to have significant effects on two important engineering parameters:
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Naturally occurring underpressure - a global review Pet. Geosci. (IF 1.7) Pub Date : 2022-03-14
Several mechanisms have been suggested as drivers of naturally occurring underpressure. However, the phenomenon is largely underrepresented in literature. Previous studies have focused on individual cases in North America, where challenges due to topography and defining hydrostatic gradients exist. More recent publications from underpressured basins have emerged from other parts of the world, where
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3D seismic interpretation and fault slip potential analysis from hydraulic fracturing in the Bowland Shale, UK Pet. Geosci. (IF 1.7) Pub Date : 2022-03-08 Sirawitch Nantanoi, Germán Rodríguez-Pradilla, James Verdon
The Bowland Shale Formation is one of the most promising targets for unconventional exploration in the United Kingdom, with estimated resources large enough to supply the country's entire natural gas consumption for 50 years. However, development of the Bowland Shale has stalled due to concerns over hydraulic-fracturing-induced seismicity. Only three wells have been drilled and hydraulic-fractured
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Pressure variations in the northern part of the Danish Central Graben, North Sea Pet. Geosci. (IF 1.7) Pub Date : 2022-03-01 Ole Valdemar Vejbæk
The overpressure variation in the Cenozoic–Jurassic succession in the northern part of the Danish Central Graben may broadly be divided into three major compartments. An upper hydrostatically pressured unit comprises the post-mid Miocene–recent succession down to c. 1200 m depth in the northern and c. 700 m in the southern parts of the Danish Central Graben. The second compartment comprises the mid-Miocene
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The role of pore pressure and its prediction in deep geothermal energy drilling - examples from the North Alpine Foreland Basin, SE Germany Pet. Geosci. (IF 1.7) Pub Date : 2022-03-01 Michael C. Drews, Indira Shatyrbayeva, Daniel Bohnsack, Florian Duschl, Peter Obermeier, Markus Loewer, Ferdinand Flechtner, Maximilian Keim
Pore pressure prediction is a well-developed key discipline for well planning in the hydrocarbon industry, suggesting a similar importance for deep geothermal wells, especially, since drilling cost is often the largest investment in deep geothermal energy projects. To address the role of pore pressure prediction in deep geothermal energy, we investigated pore pressure-related drilling problems in the
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Overview of the exploration potential of offshore Argentina - insight from new seismic interpretations Pet. Geosci. (IF 1.7) Pub Date : 2022-02-28 Steve DeVito, Hannah Kearns
Argentina's offshore sedimentary basins cover a vast area on one of the widest continental margins on the planet, yet they remain underexplored today. Previous exploration drilling has failed to encounter commercial volumes of hydrocarbons, in part due to the poor seismic imaging of legacy 1960s–1990s 2D seismic data, and to the majority of wells being drilled on structural highs outside of the source
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The principles of helium exploration Pet. Geosci. (IF 1.7) Pub Date : 2022-02-23 Diveena Danabalan, Jon G. Gluyas, Colin G. Macpherson, Thomas H. Abraham-James, Josh J. Bluett, Peter H. Barry, Chris J. Ballentine
Commercial helium systems have been found to date as a serendipitous by-product of petroleum exploration. There are nevertheless significant differences in the source and migration properties of helium compared with petroleum. An understanding of these differences enables prospects for helium gas accumulations to be identified in regions where petroleum exploration would not be tenable. Here we show
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Geoscience for CO2 storage: an introduction to the thematic collection Pet. Geosci. (IF 1.7) Pub Date : 2022-02-21 Philip S. Ringrose, Graham Yielding
Thematic collection: This article is part of the Geoscience for CO2 storage collection available at: https://www.lyellcollection.org/cc/geoscience-for-co2-storage
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Rapid screening and probabilistic estimation of the potential for CO2-EOR and associated geological CO2 storage in Colombian petroleum basins Pet. Geosci. (IF 1.7) Pub Date : 2022-02-21 Edgar Eduardo Yáñez Angarita, Vanessa Núñez-López, Andrea Ramírez Ramírez, Edgar Castillo Monroy, Andre Faaij
Estimating the oil recovery potential using CO2 (CO2-EOR) at a national level is resource-intensive at a scale that is not usually available. The aim of this study is two-fold: first, the potential for CO2 storage and enhanced oil recovery (EOR) in Colombia is evaluated; and, second, the results from two different calculation methods (stochastic and deterministic) are compared when there is lack of
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Naturally occurring underpressure – a global review Pet. Geosci. (IF 1.7) Pub Date : 2022-02-02 T. Birchall,K. Senger,Richard Swarbrick
Several mechanisms have been suggested as drivers of naturally occurring underpressure. However, the phenomenon is largely underrepresented in literature. Previous studies have focused on individual cases in North America, where challenges due to topography and defining hydrostatic gradients exist. More recent publications from underpressured basins have emerged from other parts of the world, where
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Negatively buoyant CO2 solution sequestration in synformal traps Pet. Geosci. (IF 1.7) Pub Date : 2022-01-12 S. A. Stewart
Dissolving CO2 into water or brine produces a denser fluid than the CO2-free equivalent at all salinity, temperature and pressure conditions relevant to sedimentary basins. Negative buoyancy of CO2 solutions opens the possibility of utilizing negative-relief trapping configurations for CO2 sequestration, as opposed to structural highs conventionally sought for positively buoyant fluids, such as hydrocarbons
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Impact of modelling decisions and rock typing schemes on oil in place estimates in a giant carbonate reservoir in the Middle East Pet. Geosci. (IF 1.7) Pub Date : 2022-01-12 Mohamed AlBreiki, Sebastian Geiger, Patrick Corbett
We demonstrate how modelling decisions for a giant carbonate reservoir with a thick transition zone in the Middle East, most notably the approach to reservoir rock typing and modelling the initial fluid saturations, impact the hydrocarbon distributions and oil-in-place estimates in the reservoir. Rather than anchoring our model around a single base case with an upside and downside, we apply a comprehensive
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The rejuvenation of hydrocarbon exploration in the Eastern Mediterranean Pet. Geosci. (IF 1.7) Pub Date : 2022-01-12 Fabio Lottaroli, Lorenzo Meciani
The exploration history of the large Eastern Mediterranean Basin, which encompasses the Nile Delta, Levantine, Herodotus and Eratosthenes provinces, has seen several phases of rejuvenation since exploration started in the 1950s, with new plays opened repeatedly after the basin was considered mature by the industry. The 584 exploration wells drilled to date have discovered more than 23 Bboe recoverable
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Investigating the PS seismic imaging of faults using seismic modelling and data from the Snohvit field, Barents Sea Pet. Geosci. (IF 1.7) Pub Date : 2022-01-12 Jennifer Elizabeth Cunningham, Wiktor Waldemar Weibull, Nestor Cardozo, David Iacopini
PS seismic data from the Snøhvit field are compared with seismic modelling to understand the effect of azimuthal separation and incidence angle on the imaging of faults and associated horizon discontinuities. In addition, the frequency content of seismic waves backscattered from faults is analysed. The study area consists of a horst structure delimited by a northern fault dipping NW and oblique to
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CO2 injection and storage in porous rocks: coupled geomechanical yielding below failure threshold and permeability evolution Pet. Geosci. (IF 1.7) Pub Date : 2022-01-06 Alexandra Tsopela, Adam Bere, Martin Dutko, Jun Kato, S. C. Niranjan, Benjamin G. Jennette, Sheng-Yuan Hsu, Ganeswara R. Dasari
With the increasing demand for CO2 storage in the subsurface, it is important to recognize that candidate formations may present complex stress conditions and material characteristics. Consequently, modelling of CO2 injection requires the selection of the most appropriate constitutive material model for the best possible representation of the material response. The authors focus on modelling the geomechanical
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3D modelling and capacity estimation of potential targets for CO2 storage in the Adriatic Sea, Italy Pet. Geosci. (IF 1.7) Pub Date : 2022-01-06 Giampaolo Proietti, Marko Cvetković, Bruno Saftić, Alessia Conti, Valentina Romano, Sabina Bigi
One of the most innovative and effective technologies developed in recent decades for reducing carbon dioxide emissions to the atmosphere is carbon capture and storage (CCS). It consists of capture, transport and injection of CO2 produced by energy production plants or other industries. The injection takes place in deep geological formations with the suitable geometrical and petrophysical characteristics
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The impact of heterogeneous mixed siliciclastic-carbonate systems on CO2 geological storage Pet. Geosci. (IF 1.7) Pub Date : 2022-01-06 Azadeh Pourmalek, Andrew J. Newell, Seyed M. Shariatipour, Adrian M. Wood
Three different outcrops are selected in this study, each representing a shallow-marine system with varying heterogeneity provided by siliciclastic–carbonate mixing that may form a small or large stratigraphic trap. The impact of these styles of mixed facies on CO2 storage is relatively poorly known. This study demonstrates the significance of these systems for safe CO2 geological storage, as stratigraphic
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Calibration of naturally fractured reservoir models using integrated well-test analysis - an illustration with field data from the Barents Sea Pet. Geosci. (IF 1.7) Pub Date : 2022-01-06 David O. Egya, Patrick W. M. Corbett, Sebastian Geiger, Jens-Petter Norgard, Søren Hegndal-Andersen
This paper successfully applied the geoengineering workflow for integrated well-test analysis to characterize fluid flow in a newly discovered fractured reservoir in the Barents Sea. A reservoir model containing fractures and matrix was built and calibrated using this workflow to match complex pressure transients measured in the field. We outline different geological scenarios that could potentially
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Quantitative seismic interpretation of the Lower Cretaceous reservoirs in the Valdemar Field, Danish North Sea Pet. Geosci. (IF 1.7) Pub Date : 2021-09-13 Kenneth Bredesen, Mads Lorentzen, Lars Nielsen, Klaus Mosegaard
A quantitative seismic interpretation study is presented for the Lower Cretaceous Tuxen reservoir in the Valdemar Field, which is associated with heterogeneous and complex geology. Our objective is to better outline the reservoir quality variations of the Tuxen reservoir across the Valdemar Field. Seismic pre-stack data and well logs from two appraisal wells form the basis of this study. The workflow
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Geology and petroleum prospectivity of the Sea of Hebrides Basin and Minch Basin, offshore NW Scotland Pet. Geosci. (IF 1.7) Pub Date : 2021-08-06 Laura-Jane C. Fyfe, Nick Schofield, Simon Holford, Adrian Hartley, Adrian Heafford, David Muirhead, John Howell
The Sea of Hebrides Basin and Minch Basin are late Paleozoic–Mesozoic rift basins located to the NW of the Scottish mainland. The basins were the target of small-scale petroleum exploration from the late 1960s to the early 1990s, with a total of three wells drilled within the two basins between 1989 and 1991. Although no commercially viable petroleum discoveries were made, numerous petroleum shows
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Upscaling of outcrop information for improved reservoir modelling - exemplified by a case study on chalk Pet. Geosci. (IF 1.7) Pub Date : 2021-08-06 Dongfang Qu, Peter Frykman, Lars Stemmerik, Klaus Mosegaard, Lars Nielsen
Outcrops are valuable for analogous subsurface reservoirs in supplying knowledge of fine-scale spatial heterogeneity pattern and stratification types, which are difficult to obtain from subsurface reservoir cores, well logs or seismic data. For petrophysical properties in a domain where the variations are relatively continuous and not dominated by abrupt contrasts, the spatial heterogeneity pattern
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Open fractures in pre-salt silicified carbonate reservoirs in block BM-C-33, the Outer Campos Basin, offshore Brazil Pet. Geosci. (IF 1.7) Pub Date : 2021-08-06 O. P. Wennberg, G. McQueen, P. H. Vieira de Luca, F. Lapponi, D. Hunt, A. S. Chandler, A. Waldum, G. Nery Camargo, E. Castro, L. Loures
Natural open fractures are present in sidewall cores and in whole-core samples from pre-salt reservoirs in the licence block BM-C-33 in the Campos Basin, Brazil. Open fractures are also observed in borehole image logs, and fracture densities are in general high. The highest density of open fractures is seen in the damage zones above and below larger cavities (amalgamated cavern damage zones (ACDZs))
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Quantification of solubility trapping in natural and engineered CO2 reservoirs Pet. Geosci. (IF 1.7) Pub Date : 2021-08-06 Rory Leslie, Andrew J. Cavanagh, R. Stuart Haszeldine, Gareth Johnson, Stuart M. V. Gilfillan
Secure retention of CO2 in geological reservoirs is essential for effective storage. Solubility trapping, the dissolution of CO2 into formation water, is a major sink on geological timescales in natural CO2 reservoirs. Observations during CO2 injection, combined with models of CO2 reservoirs, indicate the immediate onset of solubility trapping. There is uncertainty regarding the evolution of dissolution
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Depositional conditions at the Aptian pre-salt margins: evidence from quantitative petrography and textural analysis of the Mucuri Member, Espirito Santo Basin, Brazil Pet. Geosci. (IF 1.7) Pub Date : 2021-08-06 George Pantopoulos, Gustavo Kenji Lacerda Orita, Garibaldi Armelenti, Camila Eliza Althaus, Juliano Kuchle, Claiton Marlon dos Santos Scherer, Amanda Goulart Rodrigues, Luiz Fernando De Ros
Aptian siliciclastic onshore deposits of the Mucuri Member are important reservoirs in the Espírito Santo Basin (eastern Brazil). A detailed quantitative petrographical and textural analysis of well core samples was performed in order to unravel their depositional processes and conditions, in relation to previously proposed depositional models. The results allowed differentiation between two groups
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The impact of heterogeneous salt velocity models on the gross rock volume estimation: an example from the Santos Basin pre-salt, Brazil Pet. Geosci. (IF 1.7) Pub Date : 2021-08-06 Alexandre Maul, Marco Cetale, Cleverson Guizan, Patrick Corbett, John R. Underhill, Leonardo Teixeira, Rodrigo Pontes, María González
The thick and heterogeneous salt section in the Santos Basin, offshore Brazil, imposes great challenges in accessing the pre-salt hydrocarbon reservoirs, especially in relation to seismic imaging, signal quality and depth positioning. Some problems arise from the current velocity models for the salt section, which, for the majority, assume that the salt is a homogeneous halite layer. In the Santos
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Intra-salt structure and strain partitioning in layered evaporites: implications for drilling through Messinian salt in the eastern Mediterranean Pet. Geosci. (IF 1.7) Pub Date : 2021-08-06 Sian L. Evans, Christopher A.-L. Jackson
We use 3D seismic reflection data from the Levant margin, offshore Lebanon to investigate the structural evolution of the Messinian evaporite sequence, and how intra-salt structure and strain varies within a thick salt sheet during early-stage salt tectonics. Intra-Messinian reflectivity reveals lithological heterogeneity within the otherwise halite-dominated sequence. This leads to rheological heterogeneity
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CO2 mineral trapping comparison in different regions: predicted geochemical reactivity of the Precipice Sandstone reservoir and overlying Evergreen Formation Pet. Geosci. (IF 1.7) Pub Date : 2021-05-27 J. K. Pearce, A. D. La Croix, F. J. Brink, P. J. Hayes, J. R. Underschultz
Injected CO2 streams may have geochemical reactivity to different rock types in a CO2 storage complex depending on solubility and formation water chemistry. The Precipice Sandstone and Evergreen Formation are a low-salinity reservoir–seal pair in the Surat Basin, Australia, targeted for potential CO2 storage. The kinetic geochemical CO2 reactivity of different rock facies from three regions were predicted
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Combining process-based models and multiple-point geostatistics for improved reservoir modelling Pet. Geosci. (IF 1.7) Pub Date : 2021-05-21 James Mullins, Helena van Der Vegt, John Howell
The construction of subsurface reservoir models is typically aided by the use of outcrops and modern analogue systems. We show how process-based models of depositional systems help to develop and substantiate reservoir architectural concepts. Process-based models can simulate assumptions relating to the physical processes influencing sedimentary deposition, accumulation and erosion on the resultant
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Potential Pb2+ mobilization, transport, and sequestration in shallow aquifers impacted by multiphase CO2 leakage: a natural analogue study from the Virgin River Basin in SW Utah Pet. Geosci. (IF 1.7) Pub Date : 2021-05-17 Michelle R. Plampin, Madalyn S. Blondes, Eric L. Sonnenthal, William H. Craddock
Geological carbon sequestration (GCS) is necessary to help meet goals for emissions reduction, but groundwater contamination may occur if CO2 and/or brine were to leak out of deep storage formations into the shallow subsurface. For this study, a natural analogue was investigated: in the Virgin River Basin of SW Utah, water with moderate salinity and high CO2 concentrations is leaking upwards into shallow
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Evolution of a sand-rich submarine channel-lobe system, and the impact of mass-transport and transitional-flow deposits on reservoir heterogeneity: Magnus Field, Northern North Sea Pet. Geosci. (IF 1.7) Pub Date : 2021-05-17 Michael J. Steventon, Christopher A.-L. Jackson, Howard D. Johnson, David M. Hodgson, Sean Kelly, Jenny Omma, Christine Gopon, Christopher Stevenson, Peter Fitch
The geometry, distribution and rock properties (i.e. porosity and permeability) of turbidite reservoirs, and the processes associated with turbidity current deposition, are relatively well known. However, less attention has been given to the equivalent properties resulting from laminar sediment gravity-flow deposition, with most research limited to cogenetic turbidite debrites (i.e. transitional-flow
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Identification and characterization of geological formations with CO2 storage potential in Portugal Pet. Geosci. (IF 1.7) Pub Date : 2021-05-12 Pedro Pereira, Carlos Ribeiro, Júlio Carneiro
Carbon capture, utilization and storage (CCUS) is considered a major part of the Portuguese strategy for reducing CO2 emissions. Some industrial sectors, the most prominent being the cement sector, require the implementation of CO2 storage to reach carbon neutrality by 2050. This paper presents and characterizes the areas with potential for CO2 storage in mainland Portugal. The lithostratigraphic and
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Significance of fault seal in assessing CO2 storage capacity and containment risks - an example from the Horda Platform, northern North Sea Pet. Geosci. (IF 1.7) Pub Date : 2021-05-12 Long Wu, Rune Thorsen, Signe Ottesen, Renata Meneguolo, Kristin Hartvedt, Philip Ringrose, Bamshad Nazarian
An understanding of fault seal is crucial for assessing the storage capacity and containment risks of CO2 storage sites, as it can significantly affect the projects on across-fault and along-fault migration/leakage risk, as well as reservoir pressure predictions. We present a study from the Smeaheia area in the northern Horda Platform offshore Norway, focusing on two fault-bounded structural closures
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Evaluating the segmented post-rift stratigraphic architecture of the Guyanas continental margin Pet. Geosci. (IF 1.7) Pub Date : 2021-05-12 Max Casson, Jason Jeremiah, Gérôme Calvès, Frédéric de Ville de Goyet, Kyle Reuber, Mike Bidgood, Daniela Reháková, Luc Bulot, Jonathan Redfern
Segmentation of the Guyanas continental margin of South America is inherited from the dual-phase Mesozoic rifting history controlling the first-order post-rift sedimentary architecture. The margin is divided into two segments by a transform marginal plateau (TMP), the Demerara Rise, into the Central and Equatorial Atlantic domains. This paper investigates the heterogeneities in the post-rift sedimentary
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Stepwise uncertainty reduction in time-lapse seismic interpretation using multi-attribute analysis Pet. Geosci. (IF 1.7) Pub Date : 2021-05-12 Masoud Maleki, Shahram Danaei, Felipe Bruno Mesquita da Silva, Alessandra Davolio, Denis José Schiozer
Recently, time-lapse seismic (4D seismic) has been steadily used to demonstrate the relation between field depletion and 4D seismic response, and, subsequently, to provide more efficient field management. A key component of reservoir monitoring is the knowledge of fluid movement and pressure variation. This information is vital in assisting infill drilling and as a reliable source of data to update
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Pore-scale assessment of subsurface carbon storage potential: implications for the UK Geoenergy Observatories project Pet. Geosci. (IF 1.7) Pub Date : 2021-03-19 Ryan L. Payton, Mark Fellgett, Brett L. Clark, Domenico Chiarella, Andrew Kingdon, Saswata Hier-Majumder
The growing importance of subsurface carbon storage for tackling anthropogenic carbon emissions requires new ideas to improve the rate and cost of carbon capture and storage (CCS) project development and implementation. We assessed sandstones from the UK Geoenergy Observatories (UKGEOS) site in Glasgow, UK and the Wilmslow Sandstone Formation (WSF) in Cumbria, UK at the pore scale to indicate suitability
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Study on the effect of pore-scale heterogeneity and flow rate during repetitive two-phase fluid flow in microfluidic porous media Pet. Geosci. (IF 1.7) Pub Date : 2021-03-18 Jingtao Zhang, Haipeng Zhang, Donghee Lee, Sangjin Ryu, Seunghee Kim
Various energy recovery, storage, conversion and environmental operations may involve repetitive fluid injection and thus, cyclic drainage–imbibition processes. We conducted an experimental study for which polydimethylsiloxane (PDMS)-based micromodels were fabricated with three different levels of pore-space heterogeneity (coefficient of variation, where COV = 0, 0.25 and 0.5) to represent consolidated
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Flow modelling to quantify structural control on CO2 migration and containment, CCS South West Hub, Australia Pet. Geosci. (IF 1.7) Pub Date : 2021-03-08 Laurent Langhi, Julian Strand, Ludovic Ricard
In order to reduce uncertainties around CO2 containment for the South West Hub CCS site (Western Australia), conceptual fault hydrodynamic models were defined and numerical simulations were carried out. These simulations model worst-case scenarios with a plume reaching a main compartment-bounding fault near the proposed injection depth and at the faulted interface between the primary and secondary
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The effects of basaltic lava flows on the petrophysical properties and diagenesis of interbedded aeolian sandstones: an example from the Cretaceous Parana Basin, Brazil Pet. Geosci. (IF 1.7) Pub Date : 2021-03-08 G. Bertolini, A. J. Hartley, J. C. Marques, D. Healy, J. C. Frantz
An analysis of the petrophysical and diagenetic effects of the emplacement of Cretaceous basaltic lava flows (Serra Geral Formation) on aeolian sandstones (Botucatu Formation) has been undertaken on core samples from the Paraná Basin, Brazil. Between 0.1 and 1 m from the contact zone, acoustic wave velocities and porosities in sandstones show a significantly wider scatter than those located >1 m away
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Fault and top seals thematic collection: a perspective Pet. Geosci. (IF 1.7) Pub Date : 2021-01-06 Quentin Fisher,Frauke Schaefer,Ieva Kaminskaite,David N. Dewhurst,Graham Yielding
Predicting the sealing capacity of faults and caprocks has been a long-standing uncertainty for those involved in the exploration, appraisal and development of petroleum reservoirs. In more recent years, interest in the topic has increased in a wide range of other applications, particularly those related to the decarbonization of our energy supply such as carbon capture and storage (CCS), radioactive
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Optimising development and production of naturally fractured reservoirs using a large empirical dataset Pet. Geosci. (IF 1.7) Pub Date : 2020-12-09 Shaoqing Sun, David A. Pollitt
Naturally fractured reservoirs are important contributors to global petroleum reserves and production. Existing classification schemes for fractured reservoirs do not adequately differentiate between certain types of fractured reservoirs, leading to difficulty in understanding fundamental controls on reservoir performance and recovery efficiency. Three hundred naturally fractured reservoirs were examined
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Reply to Discussion on ‘A knowledge database of hanging-wall traps that are dependent on fault-rock seal’, Geological Society, London, Special Publication, 496, 209–222, https://doi.org/10.1144/SP496-2018-157 Pet. Geosci. (IF 1.7) Pub Date : 2020-12-04 Peter G. Bretan,Graham Yielding,Einar Sverdrup
Regarding the first issue highlighted by Power and Murray (2020), Bretan et al. (2020) presented a meta-analysis of 38 datasets to attempt to synthesise observations made independently by many different authors. As such, it is inappropriate to include all of the data for every example. References to the original publications are given where available, and we discussed the relative reliability of the
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Discussion on ‘A knowledge database of hanging-wall traps that are dependent on fault-rock seal’, Geological Society, London, Special Publications, 496, 209–222, https://doi.org/10.1144/SP496-2018-157 Pet. Geosci. (IF 1.7) Pub Date : 2020-12-04 William L. Power,Titus A. Murray
This discussion responds to the paper by Bretan et al. (2020), specifically mentioning two issues. The first has to do with open science and the accessibility of datasets so that other scientists and the public can test and re-evaluate the work done by others. The second issue we raise concerns a specific conclusion presented in the paper, namely the implied assertion that fault-rock seal is the only
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Stratigraphic controls on hydrocarbon recovery in clastic reservoirs of the Norwegian Continental Shelf Pet. Geosci. (IF 1.7) Pub Date : 2020-10-09 Kachalla Aliyuda, John Howell, Adrian Hartley, Aliyuda Ali
These are commonly interlinked and the relative importance of each can be difficult to unravel. These variables include geological parameters such as depositional environment which has long been considered a key factor influencing the production characteristics of fields. However, quantifying the importance of any single factor, such as depositional environment, is complicated by impact of the other
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Key Controls on the Hydraulic Properties of Fault Rocks in Carbonates Pet. Geosci. (IF 1.7) Pub Date : 2020-10-05 E. A. H. Michie, A. P. Cooke, I. Kaminskaite, J. C. Stead, G. E. Plenderleith, S. D. Tobiss, Q. J. Fisher, G. Yielding, B. Freeman
A significant knowledge gap exists when analysing and predicting the hydraulic behaviour of faults within carbonate reservoirs. To improve this, a large database of carbonate fault rock properties has been collected from 42 exposed faults, from seven countries. Faults analysed cut a range of lithofacies, tectonic histories, burial depths and displacements. Porosity and permeability measurements from
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Influence of host rock composition on permeability reduction in shallow fault zones – implications for fault seal analysis (Vienna Basin, Austria) Pet. Geosci. (IF 1.7) Pub Date : 2020-09-04 Theresa Schröckenfuchs, Volker Schuller, Andras Zamolyi, Elias Mekonnen, Bernhard Grasemann
In order to calibrate equations for fault seal capacities to a specific basin, faults were analysed using core material from several Neogene hydrocarbon fields in the Vienna Basin, Austria. All studied specimens are siliciclastic rocks that were sampled from a depth interval of Thematic collection: This article is part of the Fault and top seals collection available at: https://www.lyellcollection
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The Influence of Inter- and Intra-channel Architecture on Deep-water Turbidite Reservoir Performance Pet. Geosci. (IF 1.7) Pub Date : 2020-08-24 Casey D. Meirovitz, Lisa Stright, Stephen M. Hubbard, Brian W. Romans
Bed-scale heterogeneity in channelized deep-water reservoirs can significantly influence reservoir performance, but reservoir simulation typically requires cell sizes much greater than the scale of intra-channel element architecture. Here, bed- to geobody-scale simulations elucidate the influence of bed-scale architecture and channel element stacking on flow and connectivity, informing full-field reservoir
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Ranking and selecting fault models using flow indicator fault properties and simple streamline simulations Pet. Geosci. (IF 1.7) Pub Date : 2020-07-24 Paul Wilson, Stewart Smith, Danny Povey, Simon Harris
Fault zones in porous sandstones are commonly divided into two parts: a fault core and a damage zone. Both fault zone elements could influence sub-surface fluid flow and should be incorporated in a geologically realistic model. The fault core can be implemented in the model as a transmissibility multiplier (TM) while the damage zone can be implemented by modifying the grid permeability in the cells
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Reply to Discussion on ‘Fault seal modelling – the influence of fluid properties on fault sealing capacity in hydrocarbon and CO2 systems’, Petroleum Geoscience, 2020, https://doi.org/10.1144/petgeo2019-126 Pet. Geosci. (IF 1.7) Pub Date : 2020-07-22 Rūta Karolytė, Gareth Johnson, Graham Yielding, Stuart M.V. Gilfillan
Rūta Karolyte1̇*, Gareth Johnson2, Graham Yielding3 and Stuart M.V. Gilfillan2 1 Department of Earth Sciences, University of Oxford, 3 S Parks Road, Oxford OX1 3AN 2 Department of Civil and Environmental Engineering, University of Strathclyde, James Weir Building, 75 Montrose St, Glasgow G1 1XJ 3 Badley Geoscience Ltd, North Beck House/North Beck Lane, Spilsby PE23 5NB 4 School of GeoSciences, University
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Discussion on ‘Fault seal modelling – the influence of fluid properties on fault sealing capacity in hydrocarbon and CO2 systems’, Petroleum Geoscience, 2020, https://doi.org/10.1144/petgeo2019-126 Pet. Geosci. (IF 1.7) Pub Date : 2020-07-22 Titus A. Murray, William L. Power
This discussion responds to the recent paper by Karolyté et al. (2020), in which strategies for the application of the shale gouge ratio (SGR) algorithm to fault seals in CO2 sequestration are discussed and outlined. The authors propose that the observed hydrocarbon columns in the Katnook field in South Australia and the Boggy Creek field in Victoria are supported by fault rock seal. Fault rock seal
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Hydrocarbon-bearing Characteristics of SB1 Strike-Slip Fault Zone in the North of the Shuntuo Low Uplift, Tarim Basin Pet. Geosci. (IF 1.7) Pub Date : 2020-07-01 Ziyi Wang, Zhiqian Gao, Tailiang Fan, Hehang Zhang, Lixin Qi, Lu Yun
The SB1 strike-slip fault zone, which developed in the north of the Shuntuo Low Uplift of the Tarim Basin, plays an essential role in reservoir formation and hydrocarbon accumulation in deep Ordovician carbonate rocks. In this research, through the analysis of high-quality 3D seismic volumes, outcrop, drilling and production data, the hydrocarbon-bearing characteristics of the SB1 fault are systematically