Flood-Tidal Delta Reservoirs, Medora-Dickinson Trend, North Dakota

Barwis, John H.

doi:10.1007/978-1-4613-8988-0_17

Cited by 4 publications

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“…Understanding the shape and size of these tide-dominated marginal-marine sandstones as well as the processes that contribute to their deposition and physical characteristics such as grain size and morphology is imperative when estimating their potential as petroleum reservoirs. Tidal and tide-influenced reservoirs have traditionally been good hydrocarbon reservoirs, including barrier-island systems (Barwis 1990; Barwis and Hayes 1979;Wood 2004), yet the dimensions of these systems are often difficult to predict owing to the large range of shapes and sizes in the barrier-island complex.…”

Section: Introductionmentioning

confidence: 99%

“…Several works have explored modern-day flood-tidal-delta deposits and barrier-island systems (Morton and Donaldson 1973;Fitzgerald 1976;Hubbard and Barwis 1976; Barwis and Hayes 1979;Hubbard et al 1979;Hayes 1980;Hodge 1982;Boothroyd et al 1985;Israel et al 1987;Reynolds 1999;Morales et al 2001;Davis et al 2003) as well as some in the ancient (Brenner 1978;Galloway and Cheng 1985;Barwis 1990;Longhitano et al 2010), but few provide detailed data on the nature of these deposits, specifically in the ancient. More importantly, no previous work quantitatively describes the differences between these deposits and associated marginal-marine facies and explores the possible different characteristics controlling reservoir quality and the reason for such differences.…”

Section: Introductionmentioning

confidence: 99%

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Sedimentological Characterization of the Sego Sandstone (NW Colorado, USA): A New Scheme to Recognize Ancient Flood-Tidal-Delta Deposits and Implications for Reservoir Potential

York

Painter

Carrapa

2011

Journal of Sedimentary Research

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Marginal-marine deposits are typically excellent hydrocarbon reservoirs around the world. Certain depositional environments may provide natural, selective, physical processes that produce better reservoir rocks than others depending on associated energy, hydraulic regime, etc. With this paper we present new detailed sedimentological, petrographic, and grainsize data of ancient flood-tidal-delta deposits that provide means to characterize this environment in the ancient as well as to determine reservoir characteristics. In this study, we compare grain size, grain and cement composition, and the ratio of pore space to cement from thin sections between tidal, shoreface, and flood-tidal-delta facies of the Sego Sandstone in northwest Colorado. The intent of this comparison is to provide an evaluation of different physical processes and the degree of diagenesis related to different environments to better understand the relative controls on reservoir characteristics. We find that flood-tidaldeltas show a statistically larger average grain size than either shoreface or other tidal facies. Also, flood-tidal-deltas have a smaller ratio of pore-space to cement. Shoreface facies have a larger ratio of pore space to cement overall than that of floodtidal-delta or other tidal facies. We propose that this may be due to chemistry and higher weathering rates in the backbay environment in contrast to the shoreface environment, where higher mechanical reworking may lead to selective removal of chemically unstable minerals. To test this hypothesis, we conducted statistical analyses of these petrophysical and grain size characteristics. Our results show that flood-tidal-deltas are characterized by clean upper-fine-grained cross-bedded sandstone that is well sorted and subrounded to rounded with a majority of landward paleocurrent directions and a presence of tidal bundles, mud drapes, and reactivation surfaces.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sedimentological Characterization of the Sego Sandstone (NW Colorado, USA): A New Scheme to Recognize Ancient Flood-Tidal-Delta Deposits and Implications for Reservoir Potential

York

Painter

Carrapa

2011

Journal of Sedimentary Research

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“…According to statistics, carbonate reservoirs account for 60% and 40% of global reserves for oil and gas, respectively [2]. Their contribution to the world's oil and gas production exceeds 60% [3,4]. In terms of global production distribution, the Middle East region possesses the richest oil and gas resources, contributing to approximately two-thirds of the global production, mainly from carbonate reservoirs (70% of oil and 90% of natural gas) [5,6].…”

Section: Introductionmentioning

confidence: 99%

“…Over the past few decades, scholars have conducted extensive research on the features of carbonate reservoirs. In 1985, Perry Owen Roehl pointed out in his work "Carbonate Petroleum Reservoirs" that the formation of carbonate oilfields has undergone complex diagenesis, exhibiting characteristics of wide distribution with stable deposition thickness and good reservoir rocks [2][3][4]. In 1992, Dominguez presented a comprehensive treatment of the geometry, porosity, permeability evolution, and production characteristics of carbonate reservoirs [10].…”

Section: Introductionmentioning

confidence: 99%

Production Feature Analysis of Global Onshore Carbonate Oil Reservoirs Based on XGBoost Classier

Qi,

Liu

2024

Processes

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Carbonate reservoirs account for 60% of global reserves for oil, making them one of the most important types of sedimentary rock reservoirs for petroleum production. This study aimed to identify key production features that significantly impact oil production rates, enhancing reservoir management and optimizing production strategies. A comprehensive dataset is built from reserves and production history data of 377 onshore carbonate oilfields globally, encompassing features such as production, recovery rate, and recovery degree of the whole lifecycle of an oilfield. XGBoost classifier is trained by K-fold cross-validation and its hyperparameters are optimized by Optuna optimization framework. The results show that XGBoost has the best performance evaluated with metrics including accuracy, precision, recall, and F1 score comparing with decision tree, random forest, and support vector machine. Key production features are identified by analyzing the classification feature importance of XGBoost classifier, including build-up stage cumulative production, plateau stage cumulative production, plateau stage recovery rate, plateau stage recovery degrees, and peak production. In conclusion, oilfield reserve size, build-up stage cumulative production, plateau stage cumulative production, and peak production increase, while plateau stage recovery rate decreases, and the plateau stage recovery degree of small-sized oilfields is slightly greater than that of moderate and large oilfields. The research methodology of this study can serve as a reference for studying production features of other types of oil and gas reservoirs. By applying the methodology to low-permeability oilfields, this paper concludes the key production features that are as follows: low-permeability oilfields generally have lower peak recovery rate, lower plateau stage recovery rate, lower decline stage recovery degree, and lower decline stage recovery rate, along with a wide but generally lower range of decline stage cumulative production compared to conventional oilfields.

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Provenance study of potential Oligocene reservoirs in Nile Delta and offshore Mediterranean

et al. 2022

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This study aims to investigate the provenance of the Oligocene sandstones exposed at Gebel Qatrani Formation at the Fayum Province and analogues subsurface Oligocene sandstone intervals cored from 2.7 to 5.12 km at the Nile Delta. The analysis and quantification of heavy mineral assemblages revealed that the two sites maintain similar heavy mineral suites but with variable concentrations and different patterns. The provenance reliable heavy mineral indices indicate that the exposed Oligocene sandstones at Gebel Qatrani Formation are much more mature than those of the Oligocene sandstone intervals at the Nile Delta. The lower and the upper members of Qatrani Formation display heavy mineral contents indicating more maturation than the middle member which reflects an influx of less mature sandstone. The middle member may reflect a tectonic reconfiguration of the hinterland during its deposition. The reliable heavy mineral indicators of the Oligocene sandstones at the Nile delta maintain their higher values at different depths along the entire wells indicating a significant rejuvenation of the source area and hence sand supply from a source(s) that was not far distant. In contrast, Habbar-1 well sand samples (cored from 3.8 to 4.5 km) display the highest pyroxene values along with considerable contents of amphibole, mica, sillimanite, and kyanite indicating transport from a shorter distant source including a metamorphic one. Thirty seismic cross sections are interpreted and used to construct isopach maps which revealed the diagenetic effect of the heavy mineral suits with depth. That will subsequently affect the reserving characteristics of Oligocene sand intervals. Moreover, according to the estimated petrophysical parameters, the Oligocene intervals in Habbar-1 and Port Fouad Marine Deep-1 wells are very promising.

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Flood-Tidal Delta Reservoirs, Medora-Dickinson Trend, North Dakota

Cited by 4 publications

References 1 publication

Sedimentological Characterization of the Sego Sandstone (NW Colorado, USA): A New Scheme to Recognize Ancient Flood-Tidal-Delta Deposits and Implications for Reservoir Potential

Sedimentological Characterization of the Sego Sandstone (NW Colorado, USA): A New Scheme to Recognize Ancient Flood-Tidal-Delta Deposits and Implications for Reservoir Potential

Production Feature Analysis of Global Onshore Carbonate Oil Reservoirs Based on XGBoost Classier

Provenance study of potential Oligocene reservoirs in Nile Delta and offshore Mediterranean

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