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Showing 1 to 20 of 45 for “"isopach"”.
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The Relationship of the Mississippian Charles formation to the Structure of the Nesson Anticline of North Dakota
<p>An isopach map superimposed upon a structure contour map of the Charles formation shows a definite thinning of the Charles over the structurally high areas of the Nesson Anticline of North Dakota. It is here suggested that this fact be used to help exploration for oil in the area. </p>
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Discontinuities in the Icebox Formation (Ordovician), Williston Basin, North Dakota and Montana
… of the Winnipeg Group from each other, and isopach maps were constructed for each formation to ensure consistency and uniformity in the stratigraphic data. Most gamma-ray curves within the Icebox Formation interval tend to extend off-scale. A total of 365 gamma-ray curves were extracted from …
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Methane potential of upper Fort Union formation sandstones, Campbell County, Wyoming
… total sandstone thickness, and sandstone ratio isopach maps of the study area. In the northern section of the study area, the upper part of the study interval crops out; therefore, a second set of maps were constructed for the northern area. The resulting maps depict an increase in sandstone …
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Delineating of the Utica Shale/Point Pleasant Formation Play System to Determine Influence of the Precambrian Basement in Northeastern Ohio
… then contoured into four structure maps and 4 isopach thickness maps. These maps were analyzed with known Precambrian faults and lineaments, along with known Precambrian basement features, to determine if these Precambrian influences affected the deposition of these Ordovician strata. It is …
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Sequential development of the Gassaway structure in Braxton County, West Virginia
… positive flower structures. Structure and isopach maps constructed from several hundred wells throughout the study area help constrain the aerial extent of the Gassaway structure, defining it as a dome rather than an anticline. Well log data were used to construct stratigraphic …
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Sub-Surface Structural Analysis of the Appalachian Basin in Morrow County, Ohio
… log data from 2,662 wells to create structure, isopach, trend surface, and residual maps. A key objective of this study was to correlate stratigraphic horizons across the county within Cambrian-Ordovician strata to determine locations of thinning and thickening that are translated throughout the …
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Description and Genesis of the Western Cold Turkey Creek Field Anomaly, Williston Basin, Bowman County, North Dakota
… The resulting data were used to generate an isopach map for each of twenty-nine lithologic units identified, and an additional five structure contour maps were generated on the tops of conformable units. Units were correlated and two cross-sections through the structure were generated. One …
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A Subsurface Stratigraphic Study of the Middle Atoka, Sebastian County, Arkansas
… based on picked tops was used to create isopach maps of the units of interest. The log signatures and geometry of the sand bodies indicate that they were deposited in a deltaic system that prograded across this portion of this basin. Distributary-mouth bar deposits dominate the Casey …
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Stratigraphic evolution and architectural analysis of structurally confined submarine fans: a tripartite outcrop-based study
… supply (A:S), as the bowl-shaped basin filled. Isopach mapping reveals a prominent thick, which nearly coincides with the depositional axis of the Guaso I. Proximally, this thick comprises a mass-transport complex, as well as channels and mudstone sheets. On the basin floor, the thick is largely …
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Regional Mapping and Reservoir Analysis of the Middle Devonian Marcellus Shale in the Appalachian Basin
… maps were generated over the study area.;• Isopach maps of the Mahantango Shale, Marcellus Shale, Oatka Creek Member, Cherry Valley and Union Springs Member. These maps show the stratigraphic thicknesses of the various formations and members.;• Net thickness maps of the Marcellus Shale …
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3D seismic attribute analysis and machine learning for reservoir characterization in Taranaki Basin, New Zealand
… conducted for structural maps, horizon slices, isopach, and velocity maps. Well log and morphological analyses are performed for formation sequence and petrophysics identification. Attribute analyses including RMS, dip, azimuth, and eigenstructure coherence are implemented to identify …
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A Regional Study Of Wilcox Reservoirs In The Deepwater Northern Gulf Of Mexico
… of a cross section and structure, amplitude, and isopach maps, as well as, reserve calculations. These results are then compared to the literature on jack and St. Malo fields to provide an evaluation of regional reservoir characteristic variations. There is potential for economic gain in both …
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Subsurface study of the Lee formation in Buchanan County, Virginia
… data supported by 11thologic analysis and isopach mapping of the present report indicate that post-Mississippian pre-Pennsylvanian time in Buchanan County was a time of emergence and erosion. During this time, basinlike topographic depressions were developed in southeastern and northwestern …
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Stratigraphy and Depositional Environment of the Middle Atoka Formation, Central Arkoma Basin, Western Arkansas
… logs and associating previous research. Several isopach maps are made, explaining the development of sandstone in target units such as Tackett and Casey.</p> <p>The sequence stratigraphy of the middle Atoka formation is mainly composed of transgressive systems tracts and part of a highstands …
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Depositional environments and history of the Winnipeg Group (Ordovician), Williston Basin, North Dakota
… facies relationship between these units.</p> <p>Isopach maps, sandstone-shale ratio maps, and kaolinite-illite ratio maps suggest that the Middle Ordovician marine connection to North Dakota was to what is now the southeast through Minnesota rather than to the present southwest, as was previously …
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Analysis of the Upper Cotton Valley Group in the Northeastern Mississippi Interior Salt Basin
… the study area. Stratigraphic cross sections and isopach maps have been prepared to display changes in thickness of the Upper Cotton Valley Group. This provides an understanding and comparison of sediment deposition in the northeastern MISB during the Late Jurassic to Early Cretaceous time. The …
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Allostratigraphy of the Upper Ordovician Blue Mountain Formation, Southwestern Ontario, Canada
… 3. The creation of subsurface elevation and isopach maps, defining structure and extent of the allomembers in subsurface, 4. Identifying the Algonquin Arch as a mobile feature during the Upper Ordovician, responding to the loading and unloading of the Taconic orogenic front and the resulting …
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Tectonic history of Billings and southern McKenzie Counties, southwestern North Dakota
… trend surface residuals to define structures. Isopach map patterns, along with subsidence analysis were used to identify episodes of tectonic activity within the area. </p><p> Although the subsidence of the Williston Basin was the principal regional tectonic activity, the structural features in …
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Provenance, redox conditions, and diagenesis of shales in Chang 7 member of Upper Triassic Yanchang Formation, Ordos Basin, China
… body is outlined roughly parallel to the 10 m isopach line of high-GR shale in Chang 7. The third paper examines mineral compositions of shales determined by XRD analysis to identify its provenance. Results show multiple provenances and reveal that the quartz-albite correlation is a useful …
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Stratigraphic Architecture and Paleogeography of the Juniata Formation, Central Appalachians
… from the inner shelf to the upper shoreface. Isopach and paleocurrent data suggest the shoreline was oriented NE–SW and detrital sediment was dispersed west and southwest across the basin. Tectonics controlled the 2nd-Order basin-fill pattern, and these patterns vary along the strike of the …
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