The Experts below are selected from a list of 144 Experts worldwide ranked by ideXlab platform
Kenneth J Bird - One of the best experts on this subject based on the ideXlab platform.
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de convoluting mixed crude oil in Prudhoe Bay Field north slope alaska
Organic Geochemistry, 2008Co-Authors: K E Peters, Scott L Ramos, John E Zumberge, Zenon C Valin, Kenneth J BirdAbstract:Abstract Seventy-four crude oil samples from the Barrow arch on the North Slope of Alaska were studied to assess the relative volumetric contributions from different source rocks to the giant Prudhoe Bay Field. We applied alternating least squares to concentration data (ALS-C) for 46 biomarkers in the range C19–C35 to de-convolute mixtures of oil generated from carbonate rich Triassic Shublik Formation and clay rich Jurassic Kingak Shale and Cretaceous Hue Shale-gamma ray zone (Hue-GRZ) source rocks. ALS-C results for 23 oil samples from the prolific Ivishak Formation reservoir of the Prudhoe Bay Field indicate approximately equal contributions from Shublik Formation and Hue-GRZ source rocks (37% each), less from the Kingak Shale (26%), and little or no contribution from other source rocks. These results differ from published interpretations that most oil in the Prudhoe Bay Field originated from the Shublik Formation source rock. With few exceptions, the relative contribution of oil from the Shublik Formation decreases, while that from the Hue-GRZ increases in reservoirs along the Barrow arch from Point Barrow in the northwest to Point Thomson in the southeast (∼250 miles or 400 km). The Shublik contribution also decreases to a lesser degree between fault blocks within the Ivishak pool from west to east across the Prudhoe Bay Field. ALS-C provides a robust means to calculate the relative amounts of two or more oil types in a mixture. Furthermore, ALS-C does not require that pure end member oils be identified prior to analysis or that laboratory mixtures of these oils be prepared to evaluate mixing. ALS-C of biomarkers reliably de-convolutes mixtures because the concentrations of compounds in mixtures vary as linear functions of the amount of each oil type. ALS of biomarker ratios (ALS-R) cannot be used to de-convolute mixtures because compound ratios vary as nonlinear functions of the amount of each oil type.
A Cooke - One of the best experts on this subject based on the ideXlab platform.
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eileen west end development Prudhoe Bay Field alaska
AAPG Bulletin, 1990Co-Authors: A CookeAbstract:The western periphery of Prudhoe Bay Field is made of small faulted structures referred to as the Eileen West End area. Development plans for Eileen West End consist of drilling approximately 90 production wells on 80-ac spacing, two nonconventional (> 85{degree}) gas injectors, and one to two conventional gas injectors from two gravel pads (W and Z pads). The confirmation sequence of 20 wells was prioritized to provide information about the structure, fluid contacts, reservoir rock quality, and shale extent in the areas of the nonconventional gas injectors and to maximize, broad initial offtake. Drilling began with two rigs in February 1988, and production started up from Eileen West End in June 1988. In October 1989, 46 wells produced 50,000 BOPD. Peak capacity of 60,000 BOPD is expected by May 1990. Gas cap gas injection was initiated in the West End along with production. Two nonconventional gas injectors currently inject 90 MMCFD. A final injection rate for the West End is targeted at 130 MMCFD. Initiating injection concurrently with production will forestall additional pressure depletion from offtake in the Main Field of Prudhoe Bay. Integration of geologic reservoir description and engineering data is crucial to optimize, reservoir development. Current effortmore » include mud logging, sidewall core sampling, formation pressure testing, and fluid contact monitoring with open-hole and cased-hole logs. These data are interpreted to identify areas of gas or water influx and gas breakthrough to define the extent of permeability barriers, to evaluate pressure support requirements, and to effectively plan the remaining conventional and nonconventional producers.« less
Richard A Levinson - One of the best experts on this subject based on the ideXlab platform.
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geology and stratigraphy of fluvio deltaic deposits in the ivishak formation applications for development of Prudhoe Bay Field alaska
AAPG Bulletin, 1999Co-Authors: Janok P Bhattacharya, James A Lorsong, Scott T Sindelar, Douglas Knock, David D Puls, Richard A LevinsonAbstract:Significant remaining reserves in Prudhoe Bay Field are confined within deltaic rocks at the base of the Triassic Ivishak sandstone. The initial stratigraphic characterization of the Prudhoe Bay reservoir was lithostratigraphically based, and it depicted this basal reservoir interval as tabular zones between marine shale and overlying coarse-grained, fluvial sandstones. A reassessment of this interval based on cores and genetic-stratigraphic correlations depicts en echelon, offlapping, fluvially dominated deltaic wedges. Reservoir-quality rocks occur in distributary mouth bar, distributary channel, and fluvial facies associations. A paleogeographic reconstruction of one delta lobe includes an alluvial plain crossed by channels of possibly braided or low-sinuosity rivers. This alluvial plain graded into a delta plain cut by distributary channels that fed distributary mouth bars on a broad delta front. River dominance is inferred from the abundance of unidirectional current structures, normally graded beds, soft-sediment deformation, and general absence of wave-formed, tidal, and biogenic structures. Slumping and growth faulting locally replaced coarsening-upward deltaic successions with sharp-based, overthickened mouth bar and distributary channel deposits. Mudstones deposited following delta-lobe abandonment form laterally extensive flow barriers between lobes. Compartmentalization is most pronounced distally, where deltaic sandstones are overlain by and pass laterally into marine shale. Proximally, fluvial and deltaic sandstones are juxtaposed across erosional contacts, improving reservoir continuity. This stratigraphic interpretation is corroborated by production and surveillance data plus an interference test. Locally, stratigraphy and poor waterflood performance reflect completions in diachronous sandstones that originated in separate deltaic lobes. Previously, poor well performances were attributed to sandstone pinch-outs. In some cases, production can be enhanced with recompletions rather than infill drilling. Nonconventional wells planned and completed with the benefit of detailed facies-association correlations currently are recovering millions of barrels of previously bypassed oil.
K E Peters - One of the best experts on this subject based on the ideXlab platform.
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de convoluting mixed crude oil in Prudhoe Bay Field north slope alaska
Organic Geochemistry, 2008Co-Authors: K E Peters, Scott L Ramos, John E Zumberge, Zenon C Valin, Kenneth J BirdAbstract:Abstract Seventy-four crude oil samples from the Barrow arch on the North Slope of Alaska were studied to assess the relative volumetric contributions from different source rocks to the giant Prudhoe Bay Field. We applied alternating least squares to concentration data (ALS-C) for 46 biomarkers in the range C19–C35 to de-convolute mixtures of oil generated from carbonate rich Triassic Shublik Formation and clay rich Jurassic Kingak Shale and Cretaceous Hue Shale-gamma ray zone (Hue-GRZ) source rocks. ALS-C results for 23 oil samples from the prolific Ivishak Formation reservoir of the Prudhoe Bay Field indicate approximately equal contributions from Shublik Formation and Hue-GRZ source rocks (37% each), less from the Kingak Shale (26%), and little or no contribution from other source rocks. These results differ from published interpretations that most oil in the Prudhoe Bay Field originated from the Shublik Formation source rock. With few exceptions, the relative contribution of oil from the Shublik Formation decreases, while that from the Hue-GRZ increases in reservoirs along the Barrow arch from Point Barrow in the northwest to Point Thomson in the southeast (∼250 miles or 400 km). The Shublik contribution also decreases to a lesser degree between fault blocks within the Ivishak pool from west to east across the Prudhoe Bay Field. ALS-C provides a robust means to calculate the relative amounts of two or more oil types in a mixture. Furthermore, ALS-C does not require that pure end member oils be identified prior to analysis or that laboratory mixtures of these oils be prepared to evaluate mixing. ALS-C of biomarkers reliably de-convolutes mixtures because the concentrations of compounds in mixtures vary as linear functions of the amount of each oil type. ALS of biomarker ratios (ALS-R) cannot be used to de-convolute mixtures because compound ratios vary as nonlinear functions of the amount of each oil type.
David R Underdown - One of the best experts on this subject based on the ideXlab platform.
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Prudhoe Bay Field study ― Return fluid analysis
1990Co-Authors: Stephen W Almond, Jerry L Brady, David R UnderdownAbstract:Monitoring ionic content of returned fluids after various acidizing treatments gives insight into actual chemical acid-spending processes that occur dowhnole. In this study, laboratory tests ansd Field treatments were performed, and the resultant dissolution processes were monitored
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Prudhoe Bay Field study return fluid analysis
Journal of Petroleum Technology, 1990Co-Authors: Stephen W Almond, Jerry L Brady, David R UnderdownAbstract:Monitoring ionic content of returned fluids after various acidizing treatments gives insight into actual chemical acid-spending processes that occur downhole. In this study, laboratory tests and Field treatments were performed, and the resultant dissolution processes were monitored. Results show that the high siderite concentration (6 to 12%) in the Sadlerochit formation accounts for most ({approximately} 60 to 70%) of the hydrochloric acid spending, as well as {approximately} 10 to 15% of carbonate spending and {approximately} 10 to 15% of clay dissolution during HF acid treatments. The HF spending was primarily on quartz/chert in the laboratory, Field results, however indicate that the secondary clay dissolution process was the primary HF spending reaction.
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Prudhoe Bay Field study return fluid analysis
SPE formation damage control. symposium, 1990Co-Authors: Stephen W Almond, Jerry L Brady, David R UnderdownAbstract:Monitoring ionic content of returned fluids after various acidizing treatments gives insight into actual chemical acid-spending processes that occur dowhnole. In this study, laboratory tests ansd Field treatments were performed, and the resultant dissolution processes were monitored
