A strategy for acoustic impedance direct inversion in depth domain

Ruiqian Cai, Chengyu Sun, Shizhong Li

International Meeting for Applied Geoscience and Energy (IMAGE)

.... To demonstrate the improvement of direct inversion results, the results of the damped least squares inversion method are used for comparison. It is worth...

PP-PS depth-domain AVA inversion

Maud Cavalca, Robin P. Fletcher

International Meeting for Applied Geoscience and Energy (IMAGE)

.... Whenever the medium shows some level of geological complexity, this is usually achieved using pre-stack least-squares migration techniques (Fletcher...

Wide-angle AVO-inversion using constant P-traces: AVP-inversion

Dennis Cooke

International Meeting for Applied Geoscience and Energy (IMAGE)

..., G and 𝒅 𝜽 are known and we wish to invert equation (1) for m using a Least Squares (LS) method. A simple and often used LS technique is shown...

High resolution imaging using multiples „ A North Sea case study

Chandan Kumar, Rodney Johnston, Petr Jilek, Xiaolei Song, Mikhail Davydenko

International Meeting for Applied Geoscience and Energy (IMAGE)

... In this paper, we propose a workflow based on least-squares full wavefield migration (LS-FWM). It can make use of raw hydrophone and geophone data...

Application of high-end seismic imaging technologies for field development in NWS Australia

Min Lee Chua, Kai Zhao, Narcisa Lazarescu, Wai King Yong, Sergey Birdus, Alexey Artemov, Xiang Li

Petroleum Exploration Society of Australia (PESA)

... will review here are (1) demultiple workflow with 3D curvelet domain subtraction, (2) hybrid Tomo-FWI velocity model building, and (3) Least-Squares Q Pre...

ABSTRACT: Improved Calibration of the Absolute Thermal Maturity of Coal-Sourced Oils and Gas Condensates Using PLS Regression, by Sykes, Richard; Zink, Klaus-Gerhard; #90155 (2012)

Search and Discovery.com

Methane Re-Saturation in Barnett Shale Core Plugs and Determination of Post-Coring Gas Loss

Search and Discovery.com

How Porosity and Permeability Vary Spatially with Grain Size, Sorting, Cement Volume, and Mineral Dissolution in Fluvial Triassic Sandstones: The Value of Geostatistics and Local Regression

J.M. McKinley, P.M. Atkinson, C.D. Lloyd, A.H. Ruffell, R.H. Worden

Journal of Sedimentary Research (SEPM)

... using the weighted least-squares functionality of Gstat. Kriging.—The coefficients of the variogram models estimated for the rock properties of porosity...

Deconvolution of Time-Varying Bottomhole Pressure Improves Rate-Time Models History Matches and Forecasts of Tight-Oil Wells Production

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

Unconventional Resources Technology Conference (URTEC)

...: naïve, generalized Tikhonov, truncated generalized singular value decomposition (TGSVD), truncated total least-squares (TTLS) and regularized...

Development of Raman Spectroscopy as a Thermal Maturity Proxy in Unconventional Resource Assessment

Grant Myers, Kelsey Kehoe, Paul Hackley

Unconventional Resources Technology Conference (URTEC)

... (MS-2671253). Similar strong relationships occurred in the Duvernay samples with respect to increasing maturity when using Partial Least-Squares analysis...

Velocity model building with a time shift objective function: Gulf of Mexico examples

Yi Yang, Ken Matson, Tadas Krupovnickas, Mark Huiskes, Rene-Edouard Plessix, Sijmen Gerritsen

International Meeting for Applied Geoscience and Energy (IMAGE)

... significant kinematic mismatches between field and synthetic data, leading to the problem of cycle-skipping in classic least squares Full Waveform Inversion...

A Comparison of Air Photograph and Computer Simulated Wave Refraction Patterns in the Nearshore Area, Richibucto, Canada and Jervis Bay, Australia

Edward A. Bryant

Atlantic Geology

... the programs occurs with this interpolation of depth from a regular gridded matrix. The Wilson program uses a least squares fitting based upon the four...

Least-squares reverse time migration of seismic source coding based on Shearlet transform

Yingkaer Nabi, Xiangbo Gong, Zhuo Xu

International Meeting for Applied Geoscience and Energy (IMAGE)

...Least-squares reverse time migration of seismic source coding based on Shearlet transform Yingkaer Nabi, Xiangbo Gong, Zhuo Xu Least-squares reverse...

Use of Ridge Regression Analysis in Geology: ABSTRACT

Thomas A. Jones

AAPG Bulletin

... distributed variables. The least-squares estimates of the regression coefficients commonly differ from the true coefficients if the independent variables...

Generalized internal multiple elimination

Dongliang Zhang, Constantinos Tsingas, Mohammed S. Almubarak

International Meeting for Applied Geoscience and Energy (IMAGE)

...://doi.org/10.3997/2214-4609.20130836. Zhang, D., and G. Schuster, 2014, Multiples least-squares reverse time migration: Geophysics, 79, no. 1, S11–S21...

Some Geological Applications of Trend-Surface Analysis: ABSTRACT

W. A. Read

AAPG Bulletin

... by power-series polynomials, fitted by the least-squares method to areal geological data. The technique allows the regional component, represented...

Geochemical determination of heavy oil viscosity using multivariate statistical algorithms, #90110 (2010)

Jennifer Adams, Barry Bennett, Lloyd Snowdon, Steve Larter

Search and Discovery.com

... viscosity measurements, which often reveal error introduced via sample handling and analysis. Here we present multivariate statistical partial least squares...

Unlocking subsurface complexity: Sparse ocean-bottom node and full-waveform inversion for northern Green Canyon, Gulf of Mexico

Kate Glaccum, Denes Vigh, Yao Yu, Eray Kocel, Bing Bai, Di Chen, Hongyan Li, Kevin Lyons

International Meeting for Applied Geoscience and Energy (IMAGE)

... in the migrated output. We can consider FWI as a type of non-linear least-squares process for this effect. Second International Meeting for Applied...

The direct linear electromagnetic inverse with constraints

Peter Walker

International Meeting for Applied Geoscience and Energy (IMAGE)

... is in ohms. Figure 3: The inverted resistance for the model in Figure 2 with no constrainsts (i.e using simple least squares). The colour scale...

Abstract: Least-Squares Measurement of Shear-Wave Splitting; #90211 (2015)

Richard Bale, Jianchao Li, Bruce Mattocks, and Shuki Ronen

Search and Discovery.com

...Abstract: Least-Squares Measurement of Shear-Wave Splitting; #90211 (2015) Richard Bale, Jianchao Li, Bruce Mattocks, and Shuki Ronen Datapages...

Improved subsalt imaging in Brazil Campos basin Cascaded application of hybrid interbed demultiple, P- and S-salt velocity joint migration, and subsalt converted wave suppression

Riaz Alai, Faqi Liu, Darrell Armentrout, David Brookes, Terry Johnson, Milos Cvetkovic, Gundogan Coskun, Shah Sulaiman, Kien Kok Lee, Afiq Mokhtar, Christopher Lee Slind, Hafizan Wahab, Wan Ching Low, Ali Andrea B. Hashim

International Meeting for Applied Geoscience and Energy (IMAGE)

... Top of Salt • Marchenko method - between Top and Base of Salt and through a simultaneous Least-Squares matching with the data, the estimated interbed...

CGG 3D Surface-Related Multiple Modelling: A Unique Approach, #41590 (2015).

David Le Meur, Antonio Pica, Terje Weisser

Search and Discovery.com

.... Introduction Multiple generation “squares” (at least for first order multiples) the degree of complexity of the reverberated reflected energy...

Horizon detection with CNN-based multiscale volumetric flattening

Jesse Lomask

International Meeting for Applied Geoscience and Energy (IMAGE)

... surfaces are subsequently fitted to these dips using least squares inversion. This method is demonstrated on 3D seismic using both 2D and 3D CNNs...

Abstract: AVAZ Inversion for Fracture Orientation and Intensity: a Physical Modeling Study; #90187 (2014)

Faranak Mahmoudian and Gary F. Margrave

Search and Discovery.com

... in matrix form can be written as, Gnm×3 X3×1 = Rnm×1 . (24) The unknown vector X = (W11 , W12 , W22 ) can be obtained from a damped least-squares inversion...

Machine learning and explainable AI for predicting missing well log data with uncertainty analysis: A case study in the Norwegian North Sea

Sushil Acharya, Karl Fabian

International Meeting for Applied Geoscience and Energy (IMAGE)

... regression, Principal Component Regression (PCR), Partial Least Squares Regression (PLSR), random forest, and bidirectional long short-term memory (Bi-LSTM...