Clay Typing, Mineralogy, Kerogen Content and Kerogen Characterization from DRIFTS Analysis of Cuttings or Core

Michael Herron, MaryEllen Loan, Alyssa Charsky, Susan L. Herron, Andrew E. Pomerantz, Marina Polyakov

Unconventional Resources Technology Conference (URTEC)

... Tmax values. DRIFTS Mineralogy and FTIR The DRIFTS methodology of performing a weighted least squares regression of a sample spectrum on a library...

Improved TOC and Lithology Prediction for Wolfcamp Shales Using AVO Attribute Analysis

Jaewook Lee, Un Young Lim, David Lumley

Unconventional Resources Technology Conference (URTEC)

...(curvature) terms of the AVO curves depending on the changes in the rock properties. We apply a least-squares curve fitting method to calculate the three...

ABSTRACT: Enhanced-Semblance-Weighted High Resolution Radon Transform in T-X Domain, by Wang, Tang; #90142 (2012)

Search and Discovery.com

Computer Sand Volume Determinations in the Long Beach Unit of the Wilmington Oil Field

Xenophon C. Colazas, Donald D. Clarke, John H. Robinson, Daniel D. Moreno

Pacific Section of AAPG

... and a weighted least squares fit of a. surface passing through the point is performed. Each point is weighted by its distance from the center point...

Problem Areas in Interpretation of Pressure Measurements in Thin and Multi-Layered Reservoirs

C. Fraisse, B. Simon, B. Seto, D. Nardio, J. Pouzet, Y. Grosjean

Indonesian Petroleum Association

... of the Tunu field, this gradient can only be derived from the linear, least squares fit of actual pressure measurements taken from a large number of thin water...

Quantifying Detection Limits and Uncertainty in X-ray Diffraction Mineralogical Assessments of Biogenic Carbonates

Karen L. Vyverberg, John M. Jaeger, Andrea Dutton

Journal of Sedimentary Research (SEPM)

... in fossil coral samples. We compare the accuracy and precision of an ordinary-least-squares and a weighted-least-squares regression technique for low...

Clay Minerals in the Sediments of Lake Baikal: A Useful Climate Proxy

Richard Yuretich , Martin Melles , Brenn Sarata , Hannes Grobe

Journal of Sedimentary Research (SEPM)

... are not amenable to a direct statistical analysis. However, when the data are smoothed (locally weighted least-squares regression, coefficient = 0.3...

Geochemical Evaluation of Part of the Cambay Basin, India

A. Banerjee , K. L. N. Rao

AAPG Bulletin

... vitrinite reflectances plotted against depth for the two blocks under study. Least-squares best-fit lines for the data indicate hydrocarbon generation...

Estimating Parameters for Hierarchical Permeability Correlation Models

Zhenxue Dai, Robert W. Ritzi Jr., David F. Dominic

Special Publications of SEPM

...-squares criterion, along with parameter prior information and other weighted constraints, is used as the objective function of the inverse problem, which...

CSPG/CSEG/CWLS Convention 2006; - Abstracts, #90211 (2015).

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COMBINING GEOSTATISTICS AND MULTI-ATTRIBUTE TRANSFORMS: A CHANNEL SAND CASE STUDY, BLACKFOOT OILFIELD (ALBERTA)

B. Russell, D. Hampson, T. Todorov and L. Lines

Journal of Petroleum Geology

.... First, an initial model is built from the well logs and seismic picks. Then, this model is perturbed until a best least-squares fit is obtained between...

Evaluation of Electron Tomography Reconstruction Methods for a Barnett Shale

Laura Frouté, Emeric Boigné, Matthias Ihme, Anthony R. Kovscek

Unconventional Resources Technology Conference (URTEC)

... techniques (Conjugate Gradient Least Squares, Simultaneous Iterative Reconstruction Technique) are used to reconstruct the structure of a Barnett shale...

Induced Gamma Ray Spectroscopy (IGS) Log Application in the Java Sea

Cholid Mas, Anna Maria, Mark Schneider, Bambang Hari Setiyawan

Indonesian Petroleum Association

... yield, can be determined by weighted least squares spectral fitting. Figure 3 summarizes the process of obtaining elemental yield. This process...

Abstract: High Resolution 5D Interpolation: Measuring and Compensating for 5D Leakage; #90174 (2014)

Peter Cary and Mike Perz

Search and Discovery.com

... interpolation (Trad, 2009) generates the new data by using two constraints, a least-squares fitting constraint on the input data and a weighted L2-norm...

Abstract: Inversion Approach to Calculate Instantaneous Frequency; #90174 (2014)

Jiajun Han and Mirko van der Baan

Search and Discovery.com

... regularized least squares approach is to minimize Hf   2 2   2 Df 2 2 , where D is the classic Tikhonov regularization operator and  is a scaling...

Understanding Attributes and Their Use in the Application of Neural Analysis … Case Histories Both Conventional and Unconventional, #41473 (2014).

Deborah Sacrey, Rocky Roden

Search and Discovery.com

...-Based Coherence Least-Squares-Based Coherence AVO attribute volumes are computed from prestack data (gathers) . They include combinations of near...

Mesosoic and Cenozoic Thermal History of Sedimentary Rocks in the Bintuni Basin, Irian Jaya, Indonesia

Paul B. O'Sullivan, Kevin C. Hill, Ijep Saefudin, R. Daniel Kendrick

Indonesian Petroleum Association

... VR data set, which displays the obvious kink at ~2,000m, does not allow a "least-squares" estimate of the maximum paleogeothermal gradient. However...

The Effects of Seismic Data Conditioning on Pre-Stack Simultaneous Impedance Inversion

Scott W. Singleton

GCAGS Transactions

... Taner, takes the “statics-based” approach (Taner, 2004). It minimizes a least-squares error in a reflector by determining a local statics shift...

The Age of Illite Cement Growth, Village Fields Area, Southern North Sea: Evidence from K-Ar Ages and 18O/16O Ratios

A. G. Robinson , M. L. Coleman , J. G. Gluyas

AAPG Bulletin

... 14 shows the data for Ravenspurn North, Cleeton, and Hyde field illites plotted on such a isochron diagram. The best-fit, unweighted, least squares...

Continuous Lookback, Calibration, and Adjustment Reduces Biases and Improves Reliability of Production Forecasts

Malik Alarfaj, Duane A. McVay

Unconventional Resources Technology Conference (URTEC)

... and McVay (2020) showed that CB can be estimated from the slope of the least-squares best-fit line of the calibration curve and DB can be estimated from...

Spatially varying Chi volumes: A study in offshore Australia on background trend calculation from the Shuey two-term approximation

Hayden Powers, Noah R. Vento

International Meeting for Applied Geoscience and Energy (IMAGE)

... for the FPC algorithm. Other regression methods—least-squares, Random Sample Consensus (RANSAC), and variations of root mean square (RMS)— were tested...

Extracting Meaningful Estimates of Rock Properties from 3-D Anisotropic Velocity Models Derived from Borehole Microseismic

Scott Taylor, Jeremy King, Ben Schaeffer, Todd Hibbitts, Lucas McGreaham, Khaled Ghuneim

Unconventional Resources Technology Conference (URTEC)

...-optimal map of microseismic events. Accurate effective velocity modeling is also essential for travel time computation, used for a least squares...

Introduction to Contouring Geological Data with a Computer: Part 8. Integrated Computer Methods

J. L. Gevirtz

AAPG Special Volumes

... that are taken in groups of three and fitted exactly to a plane using a least squares or bicubic spline methods. The grid node estimate is obtained by averaging...

Abstract: Azimuthal Fourier Coefficients: A Simple Method to Estimate Fracture Parameters; #90174 (2014)

Jon Downton and Benjamin Roure

Search and Discovery.com

... it in terms of cos(2) and sin(2) and thus be solved in a straightforward fashion using least squares inversion (Downton and Gray, 2006...

Application of Both Physics-Based and Data-Driven Techniques for Real-Time Screen-Out Prediction with High Frequency Data

Jianlei John Sun, Arvind Battula, Brandon Hruby, Paymon Hossaini

Unconventional Resources Technology Conference (URTEC)

... after the maximum surface pressure. Then, step 2 applied a piecewise linear least squares fit library (Jekel and Venter 2019) with three line segments...