Evaluation of Water Hammer Analysis as Diagnostic Tool for Hydraulic Fracturing

Xiang Ma, Fuping Zhou, Jose Alberto Ortega Andrade, Shekhar Gosavi, Damian Burch

Unconventional Resources Technology Conference (URTEC)

..., an ordinary least squares objective function would not work because the magnitude of pressure changes significantly during the well shut...

Hyperspectral imaging for the determination of bitumen content in Athabasca oil sands core samples

Michelle Speta, Benoit Rivard, Jilu Feng, Michael Lipsett, and Murray Gingras

AAPG Bulletin

... TBC” herein.The relationship between the spectral TBC estimates and the true TBC was evaluated by linear least squares regression analysis. In all...

Forecast of economic gas production in the Marcellus Shale

Wardana Saputra, Wissem Kirati, David Hughes, and Tadeusz W. Patzek

AAPG Bulletin

... the best—in the least squares sense—predictions of possible futures, are free from bias, and avert significant over- or underpredictions of reserves...

Fracture-enhanced Porosity and Permeability Trends in the Bakken Formation, Williston Basin, Western North Dakota

Wayne B. Freisatz

Williston Basin Symposium

.... 1300-1323. Narr, W, and I. Lerche, 1984, A method for estimating subsurface fracture density in core: AAPG Bulletin, v. 68, no. 5...

Chapter 4: Synthetic Seismograms and Their Uses

Tom Wittick

North Texas Geological Society

... resistivity to sonic values. The Pseudosyn process uses a least squares minimum error technique to fit the data to an equation of the same form...

Depositional Processes at the Lower Wilcox Shelf…Slope Transition Zone

Mariana I. Olariu, Hongliu Zeng

GCAGS Journal

... of sandstone thickness between surfaces of interest was achieved in PetraTM software and entailed the creation of a grid using the least squares method...

Preliminary Report on Curved Fractures Near Faults as Related to Fluid Extraction

Richard J. Erdlac, Jr., Richard J. Erdlac

West Texas Geological Society

..., R.H., Jr., 1974, Experimental test of least squares strain gage calculation using twinned calcite: Geological Society of America Bulletin, vol. 85, p...

Synthetic Seismograms and Their Uses

Abilene Geological Society

... that transforms resistivity to sonic values. The Pseudosyn process uses a least squares minimum error technique to fit the data to an equation...

Quantitative Modelling of the Processes of Differential Compaction

M. J. O'Connor, P. E. Gretener

CSPG Bulletin

... a least-squares regression analysis. In both cases examined (T = 1,000 and Ti = 200) more than 98 per cent of the variance could be explained by a first...

Statistical Analysis of Fractures from the Hydraulic Fracture Test Site 1

Frank Male, Bethany Rysak, Robin Dommisse

Unconventional Resources Technology Conference (URTEC)

... distributions with the NoU-Turn Sampler. This software allows us to build generalized linear models such as ordinary least squares, Poisson, and logistic...

Quantifying Spacing Degradation in Northern Delaware Basin Using Machine Learning and Subsurface Properties

Charles Connell, Kyle LaMotta, Jizhou Li, Matt Mayer

Unconventional Resources Technology Conference (URTEC)

... spacing. For each cluster, we fit this logarithmic function to the normalized production and distance data using nonlinear least squares optimization...

Ooids from Great Salt Lake, Utah, as an Analogue for the Genesis and Diagenesis of Ooids in Marine Limestones

Charles F. Kahle

Journal of Sedimentary Research (SEPM)

.... S. HANWERKER, 1963, The least-squares refinement of crystal unit cells with powder diffraction data by an automatic computer indexing method (abs.): Pros. Ann...

Estimates of Sand Transport on the New York Shelf Using Near-bottom Current Meter Observations

P. E. Gadd, J. W. Lavelle, D. J. P. Swift

Journal of Sedimentary Research (SEPM)

... current speed of 30 cm/sec is reached. A least-squares analysis of the more recent flume data was performed in order to re-evaluate the coefficients...

Bed Configurations in Steady Unidirectional Water Flows. Part 1. Scale Model Study Using Fine Sands

Lawrence A. Boguchwal , John B. Southard

Journal of Sedimentary Research (SEPM)

... by fitting least-squares straight lines through full centerline profiles--a method that itself introduced an error of a few percent in depth measurement...

Resolving Sedimentological Uncertainties Using Magnetostratigraphic Correlation: An Example from the Middle Jurassic of Burgundy, France

Kifaya N. Belkaaloul , Djafar M. Aissaoui , Michel Rebelle , Gerard Sambet

Journal of Sedimentary Research (SEPM)

... analysis (Kirschvink 1980) with linear segments fit by least-squares analysis with three or more points between 330° and 550°C for thermally cleaned...

Assessment of Rate Normalization and Pressure Deconvolution Techniques to History-Match and Forecast Production of Tight-Oil Reservoirs Using a Physics-Based Rate-Time Model

Leopoldo M. Ruiz Maraggi, Larry W. Lake, Mark P. Walsh

Unconventional Resources Technology Conference (URTEC)

... cross-validation = initial condition = leave-one-out = least-squares = million = partial differential equation = R-squared (Pearson's correlation...

Lithology and reservoir properties of the Delaware Mountain Group of the Delaware Basin and implications for saltwater disposal and induced seismicity

Katie Smye, D. Amy Banerji, Ray Eastwood, Guin McDaid, Peter Hennings

Journal of Sedimentary Research (SEPM)

... by interpolating between well data points using a least-squares method. While differentiating reservoir sandstones and mapping their distribution...

Sedimentology and Depositional Environments of the Emery Sandstone Member of the Mancos Shale, Emery and Sevier Counties, Utah

J. Paul Matheny, M. Dane Picard

Rocky Mountain Association of Geologists

.... mean grain size. Grain size limits and sorting values are shown. Line A (y = .15x-.175, correlation coefficient = 33) is a least squares fit. Line 6 (y...

Oil vs. Gas: What are the Limits to Prospect-Level Hydrocarbon Phase Prediction?; #42513 (2020)

Andrew Murray, Zhiyong He

Search and Discovery.com

... in the C15+ saturates fraction (the most common method in fluid-source correlation studies). The calculations were done using the Alternating Least...

Water

K. O. Emery, Elazar Uchupi

AAPG Special Volumes

... and again in 1929 the net was made internally consistent by a least-squares "special adjustment." Fig. 198. Comparison of mean monthly sea levels...

Jurassic Magmatic Arc in the Alaska-Aleutian Range Batholith–Chemical Variations and Polarity*

Bruce L. Reed, Alfred T. Miesch, Marvin A. Lanphere

Alaska Geological Society

... surfaces, fitted by conventional least-squares methods, were used to examine the geographic variation of major oxides, normative minerals, and a few...

Seismic Foldout: Revealing a Promising New Play Concept in the Salar Basin, Offshore Canada

Yermek Balabekov, Susana Tierrablanca, Sriram Arasanipalai, Nizar Chemingui, PGS

GEO ExPro Magazine

... various attributes. Traditionally, a sequential workflow using Full Waveform Inversion (FWI) followed by Least- Squares Reverse Time Migration (LS-RTM...

Rejuvenating legacy seismic for screening carbon storage sites in the Gulf of Mexico

Neville Brookes, Ravi Kumar, Gregor Duval, Simon Otto, CGG

GEO ExPro Magazine

.... This improved approach benefited from least-squares fitting of the data and improved utilisation of the lower frequencies, resulting in broadband...

Satellite Magnetic Anomalies over Southeast Asia

G. Van Klinken, C. Y. Lee, M. H. Loke

Geological Society of Malaysia (GSM)

... and ionosphere .the data set has been significantly trimmed and corrected in a manner described by Regan, et aZ (1975). In addition, a linear least...

Rock Temperatures and Depths to Normal Boiling Point of Water in the United States

H. Cecil Spicer

AAPG Bulletin

...-line equation, [EQUATION] which have been obtained for each location given in the table by making a least-squares adjustment of the straight line...