Geologic Prediction of Shale Continuity Prudhoe Bay Field

Geehan, Gregory W.; Lawton, Tom; Sakurai, Shuji; Klob, H.; Clifton, Tom; Inman, Kerry F.; Nitzberg, K.E.

doi:10.1016/b978-0-12-434065-7.50009-5

Cited by 26 publications

(15 citation statements)

References 3 publications

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“…Grain size coarsens upward through this unit as does the thickness of individual depositional sequences (4=10 feet), but coarsening upward trends within individual sequences are not aIways evident (Geehan et al 1986;Lawton et al 1988). Most commonly this unit is interpreted as braided stream deposits, but in some instances an alluvial fan interpretation has been proffered on the basis of recognized debris flow criteria (see Fig.…”

Section: Depositional History and Facies Characteristicsmentioning

confidence: 96%

“…This series of deposits contains individual fining-upward sequences up to 25-30 feet thick as well as thinner 2-10 foot thick sequences showing no distinct change in grain size vertically This series has been interpreted as braided stieam or mixed braided and meandering stream in origin (see Fig. 3-14) (Eckelmann et al 1976;Geehan et al 1986;Lawton et al 1988 Atkinson et al 1990) 3.2 MAJOR PLAYS iN ALASI(M these deposits contain abundant examples of continuous (i.e., extending over one or more well spaangs) low-permeability 6-inch-to-4-foot-thick siltstones or shales and other less areally extensive or discontinuous sikstones or shales interpreted as floodplain and abandoned channel deposits, respectively (Lawton et al 1988;Atkinson et aL 1990). Thinner more localized discontinuous shales represent drapes and other slack water deposits formed in the last waning 'stages of floods or in the lee of bedforms or fluvial bars.…”

Section: Depositional History and Facies Characteristicsmentioning

confidence: 98%

“…Sediments eroded from this uplift were transported southward toward a marine basin in the direction of the present day Colville Trough. In the Prudhoe Bay area these sediments formed progradational deposits 200-500 feet in thickness (Geehan et al 1986). On the basis of a complete lack of indigenous macrofauna and microfauna, presence of an abundant and varied assemblage of terrestrial pollens (Jones and Speers 1976), and abundant sedimentological and stratigraphic evidence, Ivishak deposits have been interpreted as of fluvial or alluvial fan origin by most authors.…”

Section: Depositional History and Facies Characteristicsmentioning

confidence: 99%

“…Thickness of individual fining-upward sequences throughout this unit averages about 8 feet, and the deposits have been interpreted as being of braided stream and/or mixed braided and meandering stream origin (see Fig. 3-14) (Geehan et al 1986;Lawton et al 1988;Atkinson et al 1990). The abrupt onset of the fluvial retreat or relative transgression represented by the deposits of this unit with respect to the underlying conglomerates most probably is due to erosiomd reduction of the source area accompanied by some reworking or erosion of the upper portion of the underlying conglomeratic unit (Eckelmann et al 1976).…”

Section: Depositional History and Facies Characteristicsmentioning

confidence: 99%

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Reservoir Characterization, Production Characteristics, and Research Needs for Fluvial/Alluvial Reservoirs in the United States

Cole

Fowler²,

Jackson³

et al. 1999

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The Department of Energy's (DOE's) Oil Recovery Field Demonstration Program was initiated in 1992 to maximize the economically and environmentally sound recovery of oil from known domestic reservoirs and to preserve access to this resource. Cost-shared field demonsixation projects are being Misted in geologically defined reservoir classes which have been prioritized by their potential for incremental recovery and their risk of abandonment. This document defines the characteristics of the fifth geological reservoir class in the series, fluvial/alluvial reservoirs.The reservoirs of Class 5 include deposits of alluvial fans, braided streams, and meandering slxeams. Deposit morphologies vary as a complex function of climate and tectonics and are characterized by a high degree of heterogeneity to fluid flow as a result of exlmrne variations in water energy as the deposits formed.Eighty four Class 5 reservoirs in the DOE's Tertiary Oil Recovery Information System (TONS) database contain a total of 39 billionbarrels of original oilinplace (OOIP) or about 11% of the 360 billion barrels of 00IP in United States reservoirs listed in TOWS. Using the TONS database and its predictive and economic models, the recovery potential which could result from future application of improved oil recovery technologies was estimated to be between 228 million and 4.4 billion barrels, depending on oil price and the level of technology advancement. As much as 43!%of this potentially recoverable oil maybe abandoned by the year 2000 if immediate action is not taken. TORIS analysis and review of past industry experience with improved recovq applications in Class 5 reservoim indicated that the following processes, in order of decreasing importance, have the greatest potential for improving recovery from Class 5 reservoirs (1) Mill drillin~especially when used in conjunction with profile modification. and/or polymer floodi.rg (2) steam processes; (3) in situ combustion; (4) C02 miscible processes; (5) alkaline f100dS; and (6) surfactant f100dS.Efficient reservoir management through selecting the most suitable improved recovery process and applying it correctly, optirrdy, and in a manner consistent with the properties of the reservoiq can also contribute to increased recovery. Class 5 reservoirs will benefit from research associated with general reservoir characterization technologies and methodologies, but Class 5 reservoirs also have a need for very specific reservoir characterization models for individual reservoirs, plays, and basins. Such models addressing depositional, &genetic, tectonic, and fluid aspects of Class 5 reservoirs, will enable an increase in the predictability of the results from improved oil recovery process applications. Other identified areas of research and development that may have a positive influence on Class 5 recoveries include reservoir simulation, wellbore and facilities, and environmental considerations. Environmental research needs include demonstration of cost-effective waste management practices and demo...

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Section: Depositional History and Facies Characteristicsmentioning

confidence: 96%

Section: Depositional History and Facies Characteristicsmentioning

confidence: 98%

Section: Depositional History and Facies Characteristicsmentioning

confidence: 99%

Section: Depositional History and Facies Characteristicsmentioning

confidence: 99%

See 2 more Smart Citations

Reservoir Characterization, Production Characteristics, and Research Needs for Fluvial/Alluvial Reservoirs in the United States

Cole

Fowler²,

Jackson³

et al. 1999

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“…There are two causes for thin interlayer formation (Geehan et al, 1986;Xue, 1991;Mackey & Bridge, 1995). One is the interlayer at the stages of deposition including argillaceous interlayer and argillaceous cementation conglomerate interlayer, and the other is the interlayer in process of sediment diagenesis which is mainly calcareous cementation gritstone interlayer.…”

Section: Causes For Thin Interlayer Formationmentioning

confidence: 99%

A Study of Architecture of Thin Interlayer within Meandering River Monosandbody of Thick-Bedded Oil Layers

Shan¹,

Lin

Chen³

et al. 2017

JGG

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This paper investigates the reservoir architecture of thin interlayer within meandering river monosandbody in the thick-bedded oil layers. The thin interlayer within the monosandbody of the terrestrial reservoir is one of the dominant factors which form the reservoir heterogeneity of fluid motion. It is of equal importance in comparison with the rhythmic distribution of permeability, and it is also the important content of the elaborate representation of reservoirs. However, previous researches of the heterogeneity of reservoir focus mostly on the theory of distribution disparity of the permeability and neglect the influence of thin interlayer on the heterogeneity. Therefore, taking the PⅠ2 individual reservoir at the Putaohua reservoir formation in Daqing oilfield as an example, this paper analyzes the distribution, formation, and the three-dimensional construction of the internal thin interlayer of the monosandbody from a new point of view, on the basis of which a set of cycle research technique about it is put forward. With the method of configuration parameter extraction, which is most important before establishing interlayer configuration in three dimensions, this study clarifies the classification, causes of formation and the differences of distinct monosandbodies. Ultimately, four categories of thin interlayer according to the characteristics of the studied area is divided and two dominate causes for thin interlayer formation is discussed: argillaceous and arenaceous rock interlayer through deposition and interlayer in process of sedimentary diagenesis.For the convenience of the study, here mainly focuses on the thick -thin interlayer. Techniques are taken the use of determining the obliquity of the thin interlayer superface based on the configuration of paired wells and abandoned channel surface. The causes for thin interlayer and their classification, distribution and the three-dimensional construction are entirely revealed, which would possess important geologic meaning for taking affective engineering measures in the aspects of the elaborate representation of oil reservoir, and the research of remaining oil formation and distribution.

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Muddy Basins

2005

Mud and Mudstones

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Geologic Prediction of Shale Continuity Prudhoe Bay Field

Cited by 26 publications

References 3 publications

Reservoir Characterization, Production Characteristics, and Research Needs for Fluvial/Alluvial Reservoirs in the United States

Reservoir Characterization, Production Characteristics, and Research Needs for Fluvial/Alluvial Reservoirs in the United States

A Study of Architecture of Thin Interlayer within Meandering River Monosandbody of Thick-Bedded Oil Layers

Muddy Basins

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