Abstract: Case Study of Advanced Seismic Imaging to Illuminate Low Reflectivity Carbonate Reservoirs in Offshore Abu Dhabi, UAE; #91204 (2023)

Mohamed Mahgoub, Khalid Obaid, Oleg Khakimov, Saif Al Mesaabi

Search and Discovery.com

... Least Squares Migration improved the low frequency stability and AVA response of the final data. In this publication we present the workflow...

Multiple Suppression on Marine Data Recorded in The Middle East

Search and Discovery.com

Fast

Search and Discovery.com

Magnetic Anomalies of the Northern Gulf of California: Structural and Thermal Interpretations: Chapter 22: Part III. Regional Geophysics and Geology

O. Sanchez-Zamora, P. Doguin, R. W. Couch, G. E. Ness

AAPG Special Volumes

.... The slopes of the straight lines in Figure 7, fitted by least squares, yield the average depth, h, to the tops of the magnetic sources according...

Porosity Trends of the Lower Cretaceous J Sandstone, Denver Basin, Colorado

James W. Schmoker, Debra K. Higley

Journal of Sedimentary Research (SEPM)

... sandstone porosity histograms are plotted as a function of vitrinite reflectance in Figures 6-10. Least-squares power-law regression lines with R0...

Estimation of the Information Capacity and Practical Significance of Relationships used in Geophysical Logging

A. I. Volkova, L. B. Dvorkin

Petroleum Geology: A Digest of Russian Literature

..., A. S., 1958, Method of least squares from principles of probability theory: Geodezizdat. Geophysical logging studies often use various empirical relationships...

Difficult Lithologies: Part 4. Wireline Methods

Khaled Hashmy, Mark Alberty

AAPG Special Volumes

... these equations effectively for a solution. The more commonly used methods are -- Graphical crossplots -- Linear matrix solutions -- Weighted least squares...

Using Ground-Penetrating Radar and Capacitively Coupled Resistivity to Investigate 3-D Fluvial Architecture and Grain-Size Distribution of a Gravel Floodplain in Northeast British Columbia, Canada

Adrian S. Hickin, Benjamin Kerr, Thomas E. Barchyn, Roger C. Paulen

Journal of Sedimentary Research (SEPM)

..., M.H., and Barker, R.D., 1996, Rapid least-squares inversion of apparent resistivity pseudosections by a quasi-Newton method: Geophysical Prospecting, v...

Imaging the Colorado Plateau - Basin and Range Transition Zone Using Basalt Geochemistry, Geochronology and Geographic Information Systems

Reina F. Downing, Eugene I. Smith, Richard L. Orndorff, Terry L. Spell, Kathleen A. Zanetti

Pacific Section of AAPG

... of Geophysical Research, v. 101, p. 17,425-17,445. York, D., 1969, Least squares fitting of a straight line with correlated errors: Earth and Planetary...

The "Sorting Out" of Geological Variables Illustrated by Regression Analysis of Factors Controlling Beach Firmness

W. C. Krumbein

Journal of Sedimentary Research (SEPM)

... in the machine first computing by least squares methods the linear coefficients of the line of regression of beach firmness on each independent...

Five Geological Datasets: Appendix B

David E. Hamilton, Thomas A. Jones

AAPG Special Volumes

..., and the least-squares gridding algorithm with smoothing filter was used (see Appendix A, this volume). STRUCTURAL TOP OF A COAL UNIT These control points...

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...

Integration of Magnetic, Gravity and Geologic Data in Mapping Geologic Structures: A Case Study of a part of Lafiagi [Sheet 203], Southwestern Nigeria, #41737 (2015).

Kehinde A. Olawuyi, Bankole D. Ako, Gregory O. Omosuyi, Obasanmi A. Adelusi

Search and Discovery.com

...) by solving Euler’s equations for a given index n by least-squares inversion of the data. 2D Forward Modeling and Inversion of the Aeromagnetic...

Rapid Estimations of Dynamic Hydraulic Fracture Fronts from Cross-Well Low-Frequency Distributed Acoustic Sensing Strain-Rate Measurements

Smith Leggett, Erich Kerr, Ding Zhu, Dan Hill

Unconventional Resources Technology Conference (URTEC)

...-algorithm-for-nonlinear-least-squares-problems. Fletcher, R. 1971. Modified Marquardt Subroutine for Non-Linear Least Squares., AERE-R-6799, Atomic...

ELECTRONIC COMPUTERS AID IN EXPLORATION DECISIONS AND INTERPRETATIONS

E. J. Assiter

Asociación Venezolana de Geología, Minería y Petróleo (AVGMP)

... be approximated by a low-order surface, but higher order than a plane. The least squares surface fitting routine for regular or irregularly spaced...

Determining Maximum Horizontal Stress with Microseismic Focal Mechanisms - Case Studies in the Marcellus, Eagle Ford, Wolfcamp

Alireza Agharazi

Unconventional Resources Technology Conference (URTEC)

... recorded event. In this technique, a best-fit solution is sought by minimizing a residual function, usually a least-squares function, for all wave...

Estimating the Line of Correlation

Norman Macleod, Peter Sadler

Special Publications of SEPM

... no assumptions with respect to differences between biostratigraphic datum types Least squares linear regression has a long history of use in graphic...

Tomography Techniques Applied to Near Surface Velocity Models in Complex Areas of Colombia

Jorge Monsegny, Saúl Guevara

Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)

... methods, like Least Squares, Conjugate Gradients and Downhill Simplex methods, among others. The specific non-linear technique used in this work, based...

Amplitude Recovery of Digitally Recorded Data

Roy O. Lindseth

Pacific Section of AAPG

.... The simplest approach to the compensation operation is merely to calculate by least squares an exponential decay curve to fit the entire seismic trace...

Pyseis: A high-performance, user-friendly Python package for GPU-accelerated seismic modeling and subsurface imaging

Stuart Farris, Guillaume Barnier, Ettore Biondi, Robert Clapp

International Meeting for Applied Geoscience and Energy (IMAGE)

... advanced algorithms such as full waveform inversion, least-squares reverse time migration, and wave equation migration velocity analysis. Temporal...

Mapping of Rock Property Changes in Space and Time Using Microseismic Data through Full-Waveform Inversion

Jyoti Behura

Unconventional Resources Technology Conference (URTEC)

... (Figure 2d) from the processed microseismic data in Figure 4. The gradient of the least-squares objective function is efficiently computed using...

Stress State Derived from Microseismicity Induced by Hydraulic Fracturing: Downhole and Surface Monitoring

Zuzana Jechumtálová, František Stanĕk, Leo Eisner, G.Randy Keller

Unconventional Resources Technology Conference (URTEC)

...ed to increase (by a factor 2) the importance of the clear P-wave amplitudes and compensate for the larger S-wave amplitudes in the least-squares inversi...

Inversion of Salt Diapir and Sedimentary Bed Observations: A Gulf Coast Case History

K. Petersen, I. Lerche

GCAGS Transactions

... is chosen that provides the best least squares fit to that criterion. The evolution is modeled only back to the time of deposition of horizon F due...

Event Sedimentation and Long-Term Accumulation in a Salt Marsh: St. Louis Bay, Mississippi

Lawrence A. Febo, Triniti A. Dufrene, Dana A. Watzke, Samuel J. Bentley

GCAGS Transactions

... negligible bioturbation in basal core sections, with a least-squares fit of the following equation to the data: Az=Ao exp (z/s) where Az equals activity...

Integrated Workflows for Drilling Optimization and Enhanced Production

Jakob Heller, Venkatesh Anantharamu, Andrew Lewis, Bruce Karr, Ron Bianco

Unconventional Resources Technology Conference (URTEC)

... Oriented Filtering (SOF) was used to remove unwanted noise (mostly high frequency) from seismic data whilst preserving the signal. A dip-estimate...