ABSTRACT: Fracture Characterization in the Georgetown Formation (Central Texas) with AVO; #90013 (2003)

Robin Pearson, Bryan DeVault, Sri (Sam) Kulkarni, Jeff Copley

Search and Discovery.com

... fracture signature is most apparent on the azimuthal AVO gradient term. Armed with this new insight, the 3-D seismic data were revisited and reprocessed...

Rock Physics and Reservoir Characteristic of a Calcitic-Dolomitic Sandstone Reservoir

H. Morris, B. Hardy, E. Efthymiou, T. Kearney

Indonesian Petroleum Association

.... However many legacy AVO datasets still have this subtle but important problem. Undertaking any Intercept (I) and Gradient (G) analysis...

Integrated Workflow for the Reservoir Properties Prediction using the Ultra-Far Seismic Data, Mansoura Area, Onshore Nile Delta, Egypt, #42325 (2019).

Walaa Fathy, Asghar Shams,

Search and Discovery.com

... and gradient that indicates the AVO anomaly. By calibration of this AVO anomaly with both the gamma ray log and top pay of gas well, we can notice...

Frequency Gradient of Spectral Decomposition for Identifying Hydrocarbon Reservoir … Example from Indonesian Field

Abdul Haris, Ahsanul Khair

Indonesian Petroleum Association

... reservoir, the resulted low frequency shadow zone is consistent with AVO attribute such as product of AVO’s intercept and gradient. However, the conventional...

Fluid and Petrophysical Prediction in the Elastic Impedance Domain Using Neural Network Technique; #41066 (2012)

M. Hermana, M. Najmi, Z.Z.T. Harith, and C.W. Sum

Search and Discovery.com

...() = A + B sin2 (1) where A and B are the intercept and gradient in 2-term AVO. By changing sin2 with tan, the equation would be: R() = A + B tan (2...

Seismic Avo Attributes and Machine Learning Technique to Characterize A Distributed Carbonate Build Up Deposit System in Salawati Basin Eastern Indonesia

Yudistira Effendi, Edi Suwandi Utoro, Sri Lestari, Lilik T. Hardanto

Indonesian Petroleum Association

... in amplitude of a seismic reflection with varying offset. These attributes include: AVO intercept, AVO gradient, intercept multiplied by gradient, far...

Abstract: Generation and Interpretation of Multiple Seismic Data Volumes for Fluid and Lithology Discrimination in the Mahogany Field, Offshore East Coast Trinidad, by Rosemarie T. Ramkhelawan, Charlie Baynes, Mick J. Casey, Samuel R. Johnson, and Jennifer L. Nelson; #90039 (2005)

Search and Discovery.com

Geological Interpretation Using Pattern Recognition from Self-Organizing Maps and Principal Component Analysis

Search and Discovery.com

Abstract: Mining Big Data Using Principal Component Analysis and Using Results to Find Oil and Gas with Neural Analysis of Multiple Seismic Attributes … Machine Learning!; #90304 (2017)

Deborah Sacrey

Search and Discovery.com

... (sweetness, relative acoustic impedance, average energy), AVO (fluid factor, intercept gradient), spectral decomposition (either envelope based...

Rock Physics and Reservoir Characterization of a Calcitic-Dolomitic Sandstone Reservoir; #41499 (2014)

H. Morris, E. Efthymiou, B. Hardy, T. Kearney

Search and Discovery.com

... the partial stacks are used to create intercept and gradient reflectivity that it becomes evident. Figure 6 and Figure 7 show the resulting intercept...

Gas Reservoir Delineation of Pantai Pakam Timur Field, North Sumatra, Indonesia

D. Tangkalalo, M. Farid Ma'ruf, Ambar Sudiono, Widjiono

Indonesian Petroleum Association

... Corner, 1997): Where : R = Reflection coefficient θ = Incident angle A = AVO intercept B = AVO gradient AVO evaluation of Pantai Pakam...

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

... are derived from intercept and gradient values or equivalents. They are employed to interpret pore fluid and/or lithology. Intercept (A) Gradient (B...

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)

... background trend of AVO Intercept and Gradient data (A and B), using a 3D seismic dataset from offshore Australia. We use Shuey’s two-term approximation...

Abstract: Determination of AVO Attributes for Hydrocarbon Resources Region of Malay Basin: The Fluid Factors (Geophysics Paper 4)

T. L. Goh, Uzir Alimat, Shaidin Arshad, M. Izzuljad Ahmad Fuad

Geological Society of Malaysia (GSM)

... of A and B were 52 the intercept and the gradient attribute of reflection amplitude versus sin2Δ plot. Castagna and Smith (1994) reported...

Fluid Prediction from 3-D Seismic Data in Deepwater Sandstone Reservoirs: Applications from Cocuite Gas Field, Veracruz Basin, Southeastern Mexico

Fouad, Khaled, Jennette, David C., Soto-Cuervo, Arturo

GCAGS Transactions

..., p. 1849-1855. Castagna, J.P., H.W. Swan and D.J. Foster, 1998, Framework for AVO gradient and intercept interpretation: Geophysics, 63, no. 3, p...

Rock Physics Study of Coal Bed Methane Reservoir Rock: Case Study of Muaraenim Coal

Bagus Endar B. Nurhandoko, Susilowati, Usep M. Ishaq, Hussein Rudiyanto, Y. Wiyanto, Budi Sulistyanto, Mahatman L. Budi, Kaswandhi Triyoso, KiskoRiondo Siahaan, Wahyu E. Abdillah, Danang Kusudiharjo

Indonesian Petroleum Association

... saturation tends to the class III, or tends to shift into lower gradient and intercept than brine saturated coal. These phenomena show that the AVO effect...

AVO Responses: The Good, the Bad and the Evil

Per Avseth

GEO ExPro Magazine

... is to make crossplots of the zero-offset reflectivity (R0) versus the AVO gradient (G). These attributes are estimated from pre-stack seismic gathers...

Learning from 40 Years Experience: Risking Seismic Amplitude Anomaly Prospects; #110139 (2010)

Mike Forrest

Search and Discovery.com

.... 5. 6. 7. 8. 9. Edge Effects Rock Physics Primary AVO Effects AVO Attribute Cross-plots (Intercept vs. Gradient) Pitfalls Vertical and Lateral...

Shallow Gas in Asribasin: Drilling Hazard or Future Potential?

Dwandari Ralanarko, Wahyu Seno Aji, Heri Gunawan, Rifqi Lubban Jauhari, Julius Sunarta, Pranowo Nugroho

Indonesian Petroleum Association

... type III of AVO anomaly (Rutherford, 1989) with negative value of intercept (≈ -0.1), negative value of gradient, and positive value of product (P*G...

Amplitude Versus Offset (AVO) Analysis: Part 7. Geophysical Methods

Allan T. Long, R. C. Anderson

AAPG Special Volumes

... to yield an amplitude versus offset gradient section. The gradient section can then be interpreted, and AVO anomalies can be correlated to the stack...

Geophysical Characterization of Carbonate Reservoirs Using Advanced Interpretation Techniques: Applications to Abenaki Formation, Penobscot Block, Nova Scotia; #42083 (2017)

D. Coronel, E. Villamizar, E. Illidge, S. Khurama

Search and Discovery.com

.... Figure 15 shows the gradient-intercept crossplot made for the Abenaki limestones. Based on the analysis of AVO attributes and the expected behavior...

Reservoir Characteristics of Donggi Field, Central Sulawesi, Using Inversion and AVO Analysis Methods

Dede Suherman, M. Aris Isnandar, Syaiful Damuar, Artini Sukotjo, Suprapto Soemardan

Indonesian Petroleum Association

... a perfect well, correlated to the seismic. For this purpose, intercept and gradient attributes are generated from all data gathered, while seismic...

Time Lapse Feasibility Seismic Study of Gas Carbonates Reservoir in Tetra Field, Indonesia

Helmi Indrajaya, Boris Gurevich, Maxim Lebedev, Sigit Sukmono

Indonesian Petroleum Association

... shows a significant change to zero-offset reflectivity (the intercept) but only minor changes to the AVO gradient.  The change in seismic response...

Offshore Colombia: Discovering New Value in Legacy Data Using Modern Workflows

Kyle Reuber, Antara Goswami, Darren Judd, Shihong Chi, ION

GEO ExPro Magazine

... gathers and the integration of well * A) * TWT PreTSM- - * * * * + Gradient vs Intercept B) ION Geophysical Corporation Legacy vs...

Case Study: Can We Use Angle Gathers to Detect Fracture Distribution of Carbonate Reservoir in Rama Field?

Zha Chaoyang, Sun Pengxiao, Shen Xiaohong, Wen Shuliang, Tang Donglin, Heng Liqun

Indonesian Petroleum Association

... intercept and gradient from a linear fit of P-wave reflection amplitude to the sine square of the angleof-incidence, which contains implied information...