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The AAPG/Datapages Combined Publications Database

Showing 1,777 Results. Searched 195,354 documents.

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Application of the β-Derivative to Evaluate Multi-Fractured Horizontal Well Performance in Unconventional Shale Reservoirs

F. Anthony Jimenez, Thomas A. Blasingame

Unconventional Resources Technology Conference (URTEC)

... = Dimensionless pressure integral ppd = Primary pressure derivative ("Cartesian" derivative), psi/hr q = Flowrate, STB/D rw = Wellbore radius, ft R2...

2022

Abstract: On Choosing Differential Operators; #90171 (2013)

John C. Bancroft

Search and Discovery.com

... with the main emphasis placed on the first derivative, using a polynomial and spectrally derived approximations. The accuracy of the operators is compared using...

2013

Abstract: On Choosing Differential Operators; #90171 (2013)

John C. Bancroft

Search and Discovery.com

... with the main emphasis placed on the first derivative, using a polynomial and spectrally derived approximations. The accuracy of the operators is compared using...

2013

Finite Difference Modeling: Part I: Become Expert in Five Minutes

Lasse Amundsen, Ørjan Pedersen, Martin Landrø

GEO ExPro Magazine

... a little bit… derivative.” The history of calculus does not begin with the findings of the English mathematician and physicist Sir Isaac Newton (1642...

2018

The Utilization of the "Rate-Integral" to Assist with Decline Curve Analysis of Poor-Quality Unconventional Time-Rate Data

E. W. Bryan, D. Symmons, D. Ilk, T. A. Blasingame

Unconventional Resources Technology Conference (URTEC)

... integral-derivative," where these functions are defined as: pDi = 1 tD tD ò0 pD (t )dt pDid (tD ) = t D d pDi (tD ) dtD ("pressure integral...

2021

Analysis of Multiple Flow/Buildup Tests Including a 5-year Buildup: Case Study of an Australian Shale Gas Well

Christopher R. Clarkson, Alexander Cote

Unconventional Resources Technology Conference (URTEC)

... to BU #1. Use of the integral of rate-normalized gas pseudopressure and its derivative further improves the derivative quality (Figure 11, right), without...

2022

Numerical Modeling of 1D Anomalous Diffusion in Unconventional Wells Using a Nonuniform Mesh

Ralf Holy, Erdal Ozkan

Unconventional Resources Technology Conference (URTEC)

... coefficient similar to Darcy’s permeability with field units of md. d1−α . ft β−1 . The time-fractional derivative ∂1−α 𝑓𝑓(𝑡𝑡)⁄∂t1−α is defined...

2017

Well Done as Activity and Discoveries Rebounded in 2022

PESA Staff

Petroleum Exploration Society of Australia (PESA)

... $100 per barrel, Rystad Energy research showed. Many shale operators offset their risk exposure through derivative hedging, helping them to raise capital...

2022

Characteristics of the Free Surface Multiple Attenuation Using Wave Field Extrapolation; #40504 (2010)

Patrícia P. Ferreira, Marco Antonio, Cetale Santos, and Luiz Landau

Search and Discovery.com

... attenuation is based on forward wave field extrapolation theoretical principles in which the one-way Rayleigh integral uses the input data as a prediction...

2010

Recognition of Subtle Features in Geologic Maps

J. E. Robinson, D. F. Merriam

CSPG Special Publications

... of noise. Operators such as downward continuation, derivative, and edge detection can be applied to digital geologic maps on shallow, well-documented...

1980

Predicting Estimated Ultimate Recovery from Flowing Material Balance Analysis Considering Rock and Connate Water Expansion for Unconventional Gas Reservoirs

Aykut Atadeger, Mustafa Onur, Leslie G. Thompson, Barry A. Ruddick

Unconventional Resources Technology Conference (URTEC)

... identification method is proposed. It is based on a log-log diagnostic plot of the derivative of rate-normalized pseudopressure change vs. sorted material...

2021

Characterization of Gas Reservoirs Using Production Data Analysis - Pre-Tertiary Basement Gas Reservoir, South Sumatra, Indonesia

Helmi Pratikno, Teddy H. Komaroedin, Taufan Marhaendrajana

Indonesian Petroleum Association

... integral-derivative functions to present data function with better resolution, as well as to account for variable-rate/variable pressure drop...

2005

Unsteady-state diffusion modeling of gas in coal matrix for horizontal well production

Jian-Chun Guo, Ren-Shi Nie, and Yong-Lu Jia

AAPG Bulletin

...-integral function () and its derivative () with dimensionless production time (); and are plotted using full lines and dashed lines, respectively. Rate...

2014

Abstract: A Phase Shift Plus Interpolation Extrapolation for Two-way Wave Equation Migration; #90172 (2014)

Jianhua Pan

Search and Discovery.com

... applied to downgoing wave and upgoing wave are different and the derivative of wavefield to depth needs to be calculated. A synthetic example presented...

2014

A hybrid deep learning network for tight and shale reservoir characterization using pressure and rate transient data

Hamzeh Alimohammadi, Hamid Rahmanifard, and Shengnan Nancy Chen

AAPG Bulletin

... integral derivative cumulative production. The performances of these architectures are compared, and the hybrid convolutional neural networks–long...

2022

Multispectral Volumetric Curvature Adding Value to3D Seismic Data Interpretation, #41540 (2015).

Satinder Chopra, Kurt J. Marfurt

Search and Discovery.com

... filter of the form kx (α-1) applied to a conventional first derivative. The space domain operators corresponding to different values of α mentioned...

2015

A Physically Consistent Decline Analysis Method for Unconventional Wells

Jorge A. Acuña

Unconventional Resources Technology Conference (URTEC)

... of the data and results in a noisy derivative for field data. The + : D !& procedure to reduce noise is by calculating the integral normalized...

2021

An Alternative BEM Modeling of Transient Pressure Response of Fractured Reservoir by Use of a Semi-Analytical Approach

Junlei Wang, Ailin Jia, Yunsheng Wei, Yadong Qi

Unconventional Resources Technology Conference (URTEC)

... the segment. Besides, both flow across the edge of fracture and fluid compressibility is negligible. Using the Fredholm integral equation (Cinco-Ley, 1978...

2019

Size Frequency Distributions of Sediments

W. C. Krumbein

Journal of Sedimentary Research (SEPM)

... with it an integral curve and a derivative curve. The integral curve is such that its ordinate at any point represents the area under the given curve up...

1934

Niobrara Oil Potential

Richard A. Harnett

Earth Science Bulletin (WGA)

... within an area to a first derivative map. The first derivative equals the slope, or dip. Then a second derivative map is constructed which shows...

1968

Pressure Buildup Interpretation in Unconventional Wells

Jorge A. Acuña

Unconventional Resources Technology Conference (URTEC)

... operators so it is becoming more important to review pressure buildup interpretation techniques. Discrepancies between buildups and drawdown...

2023

Optimizing the Development of a Stacked Continuous Resource Play in the Midland Basin

James Courtier, Joe Wicker, Travis Jeffers, Pat Curth

Unconventional Resources Technology Conference (URTEC)

..., allows for the development of a very high quality series of acoustic impedance inversion products and associated derivative attributes. Laredo has...

2016

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