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The AAPG/Datapages Combined Publications Database
Showing 639 Results. Searched 200,673 documents.
Applying State-of-the-Art Completion Techniques in Vaca Muerta Formation
Pablo A. Crespo, Marcelo Pellicer, Henry Jacot
Unconventional Resources Technology Conference (URTEC)
... put in regions of similar stress. One of the easiest ways to counter the heel bias effect is to use a tapered or variable shot cluster perforation...
2021
Post-depositional Structures in the Lias, South Wales
Frank J. Wobber
Journal of Sedimentary Research (SEPM)
...-nodular limestone bed of the inset. Interstratal sliding produced isolated nodules, and tapered nodular to semi-nodular limestone units to left...
1967
Optimizing Completion Designs for the East Texas Haynesville Utilizing Production Flow Allocations From Lower-Cost Fiber Optic Sensing DAS/DTS Systems
M. Weber, D. Weatherly, V. Mahue, R. A. Hull, K. Trujillo, R. Bohn, E. Jimenez
Unconventional Resources Technology Conference (URTEC)
.... A portion of those stages included 9 clusters per stage (11 ft. cluster spacing) with a reduced amount of shots per foot by 33% and a tapered perf design...
2021
The Generation of Scour Marks Near Obstacles
Peter D. Richardson
Journal of Sedimentary Research (SEPM)
.... With a long, tapered, slender solid immediately behind an obstacle (like scour-remnant ridges on a beach) the flow may never separate, but instead...
1968
Particle Shape: Classification of Thickness Using Slotted Screens
John C, Ludwick
Journal of Sedimentary Research (SEPM)
... are made of nickel and manufactured by electroforming. They were specified by the manufacturer as having tapered slots and a staggered pattern...
1971
Geochemistry-Based Production Allocation in Bakken-Three Forks Development
Peter Kaufman, Aaron Rodriguez, Joshua Miller, Jana Bachleda, Shuangyu Ge, Faye Liu
Unconventional Resources Technology Conference (URTEC)
... well using typical modern completions strategies such as extreme limited entry and tapered perforation design. Figure 3. Left – detailed map...
2024
Subaqueous Shrinkage Cracks from the Caithness Flagstone Series (Middle Devonian) of Northeast Scotland
R. Nowell Donovan, Richard J. Foster
Journal of Sedimentary Research (SEPM)
... in plan and tapered in form; they can also branch from a central point, hence assuming a complex sinuous appearance. Two-hundred discrete simple cracks, 5...
1972
Formation of Barrel Concretions around Methane Seepage Pathways in Upper Middle Eocene Shelf Sediments, Stone City Bluff, Texas
Jennifer K. Hendricks, Thomas E. Yancey, James E. Flis, Christopher J. Flis, Ethan L. Grossman
GCAGS Transactions
... (arrowed) at base of largest concretion. D) Short, large diameter concretion with tapered top and bottom. E) V-shaped barrel concretion in situ. F) Small...
2012
Distribution of Microborings Within Continental Margin Sediments of the Southeastern United States
Brian D. Edwards , Ronald D. Perkins
Journal of Sedimentary Research (SEPM)
... that tapered from 14 µm to 1-2 µm at their terminations (Figs. 4 and 5). These forms are remarkably similar to fungal endoliths figured by Cavaliere...
1974
Design and Calibration of a Photo-extinction Settling Tube for Grain Size Analysis
Asahiko Taira , Peter A. Scholle
Journal of Sedimentary Research (SEPM)
... was placed at the bottom of the tube (component 16 of Fig. 2). The tube was tapered into the container so that the complete sample could be recovered...
1977
Saturated hydraulic conductivity (Ks) of earth materials in a weathering profile over the Kuantan Basalt, Pahang, Malaysia
John Kuna Raj
Geological Society of Malaysia (GSM)
... towards one end where the lower 1.5 cm tapered to a thickness of 0.15 cm to provide a cutting edge. Prior to sampling, the tubes were externally greased...
2021
Using Biogenic Structures to Interpret Sharp Lithologic Boundaries: An Example from the Lower Devonian of New York
Molly Fritz Miller, Judith Rehmer
Journal of Sedimentary Research (SEPM)
... as exichinial burrow casts (Fig. 3C). Terminations are tapered, indicating that the animal moved vertically as well as horizontally along the interface...
1982
Developments in Western Canada in 1955
H. B. Peach
AAPG Bulletin
... as a single giant wedge of rock having its butt at the present Rocky Mountain Front and its tapered edge following the outcrop of the westerly sloping...
1956
Fossil Tree Casts in South Louisiana Soils
Joann Mossa , B. A. Schumacher
Journal of Sedimentary Research (SEPM)
..., the morphology typically changes downward from cylindrical to tapered and rounded in the lowermost 30 cm. Traces of lateral roots emanating from...
1993
Determination of Basinwide Paleocurrent Patterns in a Shale Succession from Anisotropy of Magnetic Susceptibility (Ams): A Case Study of the Mid-Proterozoic Newland Formation, Montana
Jurgen Schieber, Brooks B. Ellwood
Journal of Sedimentary Research (SEPM)
... in sandstones. Tapered arrows with stipple pattern indicate decreasing sand content, decreasing thickness of sand beds, and decreasing sand/shale ratio...
1993
Oriented Concretions, Ionian Coast, Italy: Evidence of Groundwater Flow Direction
E. F. Mcbride , M. Dane Picard , R. L. Folk
Journal of Sedimentary Research (SEPM)
.... All concretions have slightly tapered and rounded exposed ends. Presumably the rounded ends represent the natural ends of the concretions...
1994
Palynology and Age of Beaverhead Formation and Their Paleotectonic Implications in Lima Region, Montana-Idaho
Robert T. Ryder , H. Tate Ames
AAPG Bulletin
...). Triporate forms in that study tapered off from 15-20 percent to 5 percent of the sample total at the Turonian-Coniacian boundary. Although this percentage...
1970
Morphology of Ocean Basin Seaward of Northwest Africa: Canary Islands to Monrovia, Liberia
Julius Egloff
AAPG Bulletin
... Africa and extends from the base of the continental slope as a thick wedge of sediment (Fig. 2). The rise appears arched and tapered toward the northwest...
1972
Shallow and Deepwater Stromatolites in Lower Proterozoic Platform--to--Basin Facies Change, Great Slave Lake, Canada
Paul Hoffman
AAPG Bulletin
... low and tapered. This is related (Hoffman, 1967) to the general outhward (basinward) transport of sediment (Fig. 5). Columnar stromatolites have...
1974
Oil and Gas Developments in Western Canada in 1988
M. H. Portigal , R. M. Creed , J. R. Hogg , M. D. Hewitt
AAPG Bulletin
...). The average depth dropped 1.5% from 1,228 m in 1987. Drilling activity was especially strong during the first half of 1988, but tapered off toward...
1989
Paleostress analysis from image logs using pinnate joints as slip indicators
Alfred Lacazette
AAPG Bulletin
... at the fault and die-out in the host rock, they should be visibly tapered if both the fault intersection and the end of the joint are cut by the borehole...
2009
Computer modeling bioturbation: The creation of porous and permeable fluid-flow pathways
Andrew D. La Croix, Murray K. Gingras, Shahin E. Dashtgard, S. George Pemberton
AAPG Bulletin
... in computer graphics and design) that tapers to 1 cm (0.4 in.). The horizontal distance from the center of the half circle to the tapered tip is 25 cm...
2012
Hydraulic fracture networks bypassing thick sealing sequences as fluid conduits in deep overpressured strata
Qingfeng Meng, Baibing Yang, Zhifeng Guo, and Fang Hao
AAPG Bulletin
... that expands to 11.4 km at 3900 ms (Figure 6), creating a tapered conical structure (Figure 5D). In the outer regions of the diapir-like structure...
2025
Coiled-Tubing-Assisted Hydraulic Fracturing of CBM Wells in India Using CT-Deployed Hydrajet Perforation Technology; #41072 (2012)
Ajay Sharma, Dushyant Bhalla, and Sumit Bhat
Search and Discovery.com
... direction—from the annulus to the CT. While pumping down the CT, the ball presses against a tapered seat, creating a positive seal and not allowing flow...
2012
Diagenesis and Isotopic Evidence of Porosity Evolution in Reef Reservoir-Analog Facies in Outcrops of the St. Joe Group (Kinderhookian to Basal Osagean) in SW Missouri and NW Arkansas; #50890 (2013)
Beau Morris, Sal Mazzullo, and Brian White
Search and Discovery.com
... Dislodged reef blocks within the Compton Formation along the eastern side of Highway DD near Noel, Missouri have an apparent tapered and pinched...
2013