Bayesian Variable Pressure Decline-Curve Analysis for Shale Gas Wells

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

Unconventional Resources Technology Conference (URTEC)

... transformation is not straightforward. Equation 4 is the least-squares regression of the cumulative production. ( ) = arg min − ; , () , The goal...

Determination of Paleoheat Flux from Vitrinite Reflectance Data

I. Lerche , R. F. Yarzab , C. G. St. C. Kendall

AAPG Bulletin

... the point in multidimensional space that minimizes the least-squares deviation. An alternate method of determining these parameters consists of a Newton...

Abstract: Seismic Data Decomposition into Spectral Components Using Regularized Nonstationary Autoregression; #90187 (2014)

Sergey Fomel

Search and Discovery.com

...=-log(Zn)/t. 3. Estimate amplitudes A1,A2,…,AN of different components in equation 6 by linear least-squares fitting. Prony’s method can be applied...

Abstract: Efficient Sampling of 3-D Basin Modelling Scenarios, by S. B. Nielsen and K. Gallagher; #90923 (1999)

Search and Discovery.com

Upside down Rayleigh-Marchenko imaging: Towards a practical exact redatuming scheme for ocean bottom acquisitions

Ning Wang, Matteo Ravasi

International Meeting for Applied Geoscience and Energy (IMAGE)

...− , f+ m (5) which can be solved by the least-squares inversion. Subsequently, the Green’s functions can be retrieved according to equation 4. Θ−xR...

A Note on 'A Procedure for Computing the Lattice Constants of Some Crystal Systems by Chan (1976)'

Y. H. Lye

Geological Society of Malaysia (GSM)

... and then solving them by the method of least squares. The normal equation derived are transformed into matrix notation and are solved by using Gauss...

Abstract: Array Analysis of Surface Microseismic Data from the Rolla Microseismic Experiment; #90174 (2014)

Katarina Seckarova and David W. Eaton

Search and Discovery.com

... with the smallest least-squares error provided the solution. In addition, error plots provide a measure of the level of uncertainty in these parameters...

Comparison of the Descriptors of Sediment Grain-size Distributions

Thomas A. Jones

Journal of Sedimentary Research (SEPM)

... Doctoral Thesis, Northwestern University, 123 p. JAMES, W. R., 1968b, Least squares surface fitting with discontinuous functions: Office of Naval...

An Efficient Iterative Algorithm for Hydraulic Fracture Geometry Characterization with Distributed Strain Data

Yongzan Liu, Lijun Liu, Tiankui Guo, Ge Jin

Unconventional Resources Technology Conference (URTEC)

.... The problem is iteratively solved using the linear least squares method with smoothness regularization. Each iteration begins with an initial guess...

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...

New Technology to Identify and Characterize Natural Fractures

W. W. Weiss, Abdel Zellou

Four Corners Geological Society

... producing rate. For example, the northwest-southeast curvature information was used to construct a linear least squares fit to model the data. Four...

Abstracts: Geophysical Study of the Peace River Landslide; #90173 (2015)

Oluwafemi O. Ogunsuyi, Douglas R. Schmitt, Derek Martin, James Morgan, and Corey Froese

Search and Discovery.com

... with a nonlinear smoothness-constrained least-squares inversion method (Loke and Barker, 1996) to produce a possible true resistivity...

Abstracts: The Conventional and Non-conventional Seismic Differencing; #90173 (2015)

Vanja Vracar and Robert J. Ferguson

Search and Discovery.com

... least-squares algorithm, II) Conversion of reflection data from IDS to FSD, III) Identify surface transfer function, in FDS and IDS and IV) Compute...

Time Lapse Geochemistry Production Allocation; End Member Definition and Selection; Case Studies; Delaware Basin and Eagle Ford

Adam Turner, Catherine Donohue, J. Alex Zumberge, Andrew Muñoz, Philip Bergeron

Unconventional Resources Technology Conference (URTEC)

... are then used as endmembers for production allocation. In this study, the Alternate Least Squares (ALS) allocation method is used. ALS evaluates the goodness...

Got noisy impedance? Try this

Jingfeng Zhang, Reetam Biswas, Dhananjay Kumar, Matt Walker, Pedro Paramo, Kevin Wolf, Anar Yusifov, Sophia Gerth, Jeffrey Winterbourne, Qiang Liu, Xingchao Liu, York Zheng, Ryan Warnick

International Meeting for Applied Geoscience and Energy (IMAGE)

... of calculating impedances performs a least squares linear fit on the migrated seismic amplitudes at a given time over different angles to obtain the intercept...

Relation Between Chlorinity and Conductometric Salinity in Black Sea Water: Water

Klaus Kremling

AAPG Special Volumes

...)] Inserting the values from Table 1 and using the method of least squares, we can calculate b and a: b = 1.8128 and a = 0.0002. The standard deviation...

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...

Solving seismic inverse problems by an unsupervised hybrid machine-learning approach

Mrinal K. Sen, Arnab Dhara

International Meeting for Applied Geoscience and Energy (IMAGE)

... and the output of the DNN is an estimated model which is updated by back propagation. For example, for a linear problem, the damped least squares...

Estimation of Uncertainty in Coal Resources (1)

D. Mathew, M. P. Roberts

GCAGS Transactions

... for the lower half (zone 1) of seam no. 6 (fitted variogram: least squares method). Figure 5. Fitted and experimental variogram for the upper half...

Toward elastic free-surface topography with immersed boundaries

Edward Caunt, Rhodri Nelson, Fabio Luporini, Gerard Gorman

International Meeting for Applied Geoscience and Energy (IMAGE)

..., propagation of both compressive and shear phases yields improved imaging in contexts including reverse-time migration (RTM), least-squares RTM (LSRTM...

Shortest-path multiple well-log correlation

Hector Corzo-Pola, Sergey Fomel

International Meeting for Applied Geoscience and Energy (IMAGE)

...-squares method to get globally consistent shifts. While this method can enforce a global alignment of all logs, the least-squares fit can get...

Improved Statistical Method for Assessment of Undiscovered Petroleum Resources

David J. Forman, Alan L. Hinde

AAPG Bulletin

... Meisner and Demirmen, 1981), demonstrates that their distribution is normal. The straight line fitted by the least-squares method to the plot...

Demonstration and Quantification with Raman Spectroscopy of the Displacement of Adsorbed Methane from Coal by Injected Dissolved Carbon Dioxide for Carbon Sequestration

Grant A. Myers, Trevor Brown, Cody Morgan, Wade A. Bard, John M. Pope

Unconventional Resources Technology Conference (URTEC)

... mixtures, the technique of whole-spectrum Classical Least Squares analysis (Mark, 2010) was used to deconvolute complex overlapping spectrum components...

A recipe for practical iterative LSRTM with synthetic and real data examples from Brazil

Valeriy Brytik, Gopal Palacharla, Rishi Bansal, Diwi Snyder, Xu Li, Young Ho Cha, Partha Routh, Inma Dura-Gomez, Dmitriy Pavlov, Carey Marcinkovich

International Meeting for Applied Geoscience and Energy (IMAGE)

..., 𝑚 is the reflectivity model, and 𝑑 is the observed seismic data. The least-squares solution to the problem defined in the above equation can...

A Bayesian Framework for Addressing the Uncertainty in Production Forecasts of Tight Oil Reservoirs Using a Physics-Based Two-Phase Flow Model

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

Unconventional Resources Technology Conference (URTEC)

...on. Prior distributions for ln 𝑉𝑉𝑝𝑝 and ln 𝜏𝜏 𝑖𝑖 are best-fit distributions to the empirical histograms of 𝑖𝑖 least-squares optimization of...