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The AAPG/Datapages Combined Publications Database
Showing 1,462 Results. Searched 196,217 documents.
Surfactant EOR Improves Oil Recovery in a Depleted Eagle Ford Unconventional Well - A Case Study
I. Z. Ataceri, I. W. R. Saputra, A. R. Bagareddy, M. H. Elkady, D. S. Schechter, G. W. Haddix, V. A. Brock, K. H. Raney, C. W. Strickland, G. R. Morris
Unconventional Resources Technology Conference (URTEC)
... to stimulation. The “most likely” Arps decline curve, fit with least squares to the entirety of the pre-stimulation data (excluding two shut-in events...
2023
Bilinear Flow Analysis of Shale Gas Wells With Dynamic Hydraulic Fracture Conductivity
Ivan C. Aldana, I. Yucel Akkutlu, W. John Lee
Unconventional Resources Technology Conference (URTEC)
... was regressed using an ordinary least squares technique. Using Eq. 1, we calculated fracture conductivity and permeability for the one stage of production...
2023
Transactions: Gulf Coast Association of Geological Societies; 2016 Front Matter
Jennifer M. Smith-Engle, James J. Willis, Jill C. Willis, Norman C. Rosen, Dorene B. West
GCAGS Transactions
..., Using Corrected Bottom-Hole Temperatures 635 Wilson, Zachary, and Seiichi Nagihara Practical Application of Adaptive Least-Squares Reverse Time...
2016
Permeability Evolution during Deformation of Siliciclastic Sandstones from Moab, Utah
O. Kwon, B. T. Ngwenya, I. G. Main, S. C. Elphick
AAPG Special Volumes
... four different effective confining pressures. The fitting was carried out using a nonlinear least-squares routine based on the Marquardt-Levenberg...
2005
Holocene Relative Sea-Level Changes and Coastal Stratigraphic Units on the Northwest Flank of the Baltimore Canyon Trough Geosyncline
Daniel F. Belknap, John C. Kraft
Journal of Sedimentary Research (SEPM)
... in the previous section, basal peats were used in least-squares regression analyses to form a local relative sea-level curve. Figure 7 shows the data...
1977
The Application of Borehole Image Logs to Fluvial Facies Interpretation
Marinus E. Donselaar, Jasper M. Schmidt
AAPG Special Volumes
... Ltd.The frequency-distribution model was computationally fitted to the borehole image log dip distribution data using the least-squares difference method...
2010
Clay Diagenesis in Wilcox Sandstones of Southwest Texas: Implications of Smectite Diagenesis on Sandstone Cementation
James R. Boles, Stephen G. Franks
Journal of Sedimentary Research (SEPM)
... expandability were made, and a best-fit linear equation was determined by the least squares method. From the equation, the weight percent of each oxide...
1979
Lenticular Gypsum: Occurrences in Nature, and Experimental Determinations of Effects of Soluble Green Plant Material on its Formation
Robert D. Cody
Journal of Sedimentary Research (SEPM)
... of gypsum precipitated at the end of an experimental run is shown as a function of time. Least squares regression analyses of the data leads to the following...
1979
Flume Experiments on Lower-Flow-Regime Bed Forms in Coarse Sand
Warren R. Costello, John B. Southard
Journal of Sedimentary Research (SEPM)
... spacing along the centerline in about the downstream half of the channel, where bed orms were fully developed. Computer-fitted least-squares straight lines...
1981
Carbonate Sedimentation And Diagenesis Associated With Mg-Ca-Chloride Brines: The Permian San Andres Formation in the Texas Panhandle
Amos Bein , Lynton S. Land
Journal of Sedimentary Research (SEPM)
... by least-squares analysis of detailed X-ray diffractometer data. Data were analyzed using the SPSS (Statistical Package for the Social Sciences) programs...
1983
Trend Analysis: Chapter 18: Part IV. Managing the Business
Michael D. Smith, Donald R. Jones
AAPG Special Volumes
... want a 60% or higher probability of achieving at least a 15% DCFROR (discounted cash flow rate of return), and second, we want no more than a 15...
1992
Pollen, PB-210, and Opaque Spherules: An Integrated Approach to Dating and Sedimentation in the Intertidal Environment
James S. Clark , William A. Patterson III
Journal of Sedimentary Research (SEPM)
... excess activity from 6 cm to the surface dictate that this section be considered separately. Excluding the two surface values, least-squares analysis...
1984
Bottom Currents And Sediment Transport on San Pedro Shelf, California
David E. Drake, David A. Cacchione, Herman A. Karl
Journal of Sedimentary Research (SEPM)
... surface-wave-induced currents and a least-squares fit was computed for mean speeds as a function of ln z, where z is distance above the bottom. In cases...
1985
Silica Diagenesis, I. Solubility Controls
Loretta Ann Williams , George A. Parks, David A. Crerar
Journal of Sedimentary Research (SEPM)
.... , --Alexander (1957). Two precipitated amorphous silicas. Solid lines are least-squares regression fits to redigitized data. +--Crerar and others (1981...
1985
The Importance of Sea-Level Fluctuations in the Formation of Linear Conglomerate Bodies; Carrot Creek Member of Cardium Formation, Cretaceous Western Interior Seaway, Alberta, Canada
Katherine M. Bergman, Roger G. Walker
Journal of Sedimentary Research (SEPM)
... a weighted least-squares procedure to calculate grid-point values from surrounding real data points. The data grid was then smoothed to produce the mesh...
1987
Classification of Large-Scale Subaqueous Bedforms: A New Look at an Old Problem-SEPM Bedforms and Bedding Structures
Gail M. Ashley, Symposium Chairperson
Journal of Sedimentary Research (SEPM)
... forms are dunes. FIG. 9B. A log-log plot of wind ripples () and eolian dunes () and the calculated least squares regression line compared to regression...
1990
Fault Interpretation During Seismic Interpretation and Reservoir Evaluation: Fractured Reservoirs: Origin, Description, Evaluation
M. E. Badley, B. Freeman, A. M. Roberts, J. S. Thatcher, J. Walsh, J. Watterson, G. Yielding
AAPG Special Volumes
... are determined by least-squares regression to all data-points above the effective limit of seismic resolution. The spatial variation in slopes can...
1991
Fourier and Autocorrelation Analysis of Estuarine Tidal Rhythmites, Lower Breathitt Formation (Pennsylvanian), Eastern Kentucky, USA
Ronald L. Martino, Dewey D. Sanderson
Journal of Sedimentary Research (SEPM)
... for analysis. Additionally, the locality 3 data appear to be noisier. An exponential least squares regression curve was fitted to the data...
1993
Origin of Dolomite in the Phosphatic Miocene Hawthorn Group of Florida
John S. Compton , Donald L. Hall , David J. Mallinson , David A. Hodell
Journal of Sedimentary Research (SEPM)
... 0.003° 2 steps for 5 seconds per step to calculate the unit cell parameters a and c of dolomite by the least-squares cell refinement program LCLSQ...
1994
Measuring Sandstone Compaction from Modal Analysis of Thin Sections: How to Do It and What the Results Mean
S.N. Ehrenberg
Journal of Sedimentary Research (SEPM)
... is the least-squares fit to a larger set of Garn Formation data, including these points plus average core porosity values from 12 additional wells...
1995
The Role of Magnesium in the Crystallization of Calcite and Aragonite in a Porous Medium
Lurdes Fernandez-Diaz , Andrew Putnis , Manuel Prieto , Christine V. Putnis
Journal of Sedimentary Research (SEPM)
... 508V Guinier viewer. The lattice parameters of the different samples were refined using between 12 and 22 reflections and a least-squares program CELL...
1996
Identifying the Controls Over Downstream Fining of River Gravels
Trevor B. Hoey, Brian J. Bluck
Journal of Sedimentary Research (SEPM)
.... The conversion equations obtained (Table 1) were obtained by ordinary least-squares log-log regression. Percentiles obtained from all 122 surface counts were...
1999
Structural and Stratigraphic Evolution of the Campos Basin, Offshore Brazil: Chapter 38: Analogs
W. U. Mohriak, M. R. Mello, G. D. Karner, J. F. Dewey, J. R. Maxwell
AAPG Special Volumes
... the Campos basin were determined for each well by fitting an exponential curve, in a least-squares sense, to the present-day variation of porosity...
1989
Responses of Stable Bay-Margin and Barrier-Island Systems to Holocene Sea-Level Highstands, Western Gulf of Mexico
Robert A. Morton , Jeffrey G. Paine , Michael D. Blum
Journal of Sedimentary Research (SEPM)
... is described by a least-squares polynomial regression of data points or the position of individual peat samples is taken as the best proxy for sea level...
2000
Basic Types of Submarine Slope Curvature
Erwin W. Adams , Wolfgang Schlager
Journal of Sedimentary Research (SEPM)
... and correlation coefficients from nonlinear least-squares regression (e.g., Davis 1986). Figure 3A shows a slope profile best described...
2000