ABSTRACT 4D Seismic Monitoring of CO2: Practical Considerations, #90103 (2010)

David Lumley

Search and Discovery.com

... and images, especially the level of non-repeatable noise and complexity of wavefields, determines whether the CO2 can be accurately detected and quantified. I...

Fracture Characterization Based on Attenuation Estimation From Seismic Reflection Data Using Well-Log-Based Localized Spectral Correction

Fangyu Li, Tao Zhao, Tengfei Lin, Kurt J. Marfurt

Unconventional Resources Technology Conference (URTEC)

... from a simple convolution model (noise free) (Sheriff and Geldart, 1995):  a(t )   s( )r (t   ) d ,  (2) where, a t  is the reflected...

Capturing Geological Realism in Stochastic Simulations of Rock Systems with Markov Statistics and Simulated Annealing

Kevin P. Parks , Laurence R. Bentley , Allan S. Crowe

Journal of Sedimentary Research (SEPM)

... in a succession as a component of random noise so long as the depositional process remains stationary at the scale of interest (Doveton 1994). Markovian...

Web-Based Technologies for Real-time Directional Survey Quality Improvement

Jarrod S. DeVerse, Stefan Maus

Unconventional Resources Technology Conference (URTEC)

... in the natural magnetic field, poor instrument calibration, random sensor noise, magnetic mud, and human error. Often times, such errors go unrecognized...

The Comparative Reliability of Magnetic, Photometric and Microscopic Methods of Determining the Orientations of Sedimentary Grains

Asahiko Taira, Barry R. Lienert

Journal of Sedimentary Research (SEPM)

...-axes to individual grain elongation directions has little effect on the validity of the method. For the magnetic susceptibility anisotropy method, we...

Chapter One: Introduction to AAPG Memoir 42/SEG Investigations in Geophysics, No. 9, 7th Ed.

Alistair R. Brown

AAPG Special Volumes

... to the embedding material, the random and systematic noise in the data, and the phase of the seismic wavelet. Figure 1-5. Resolution of the reflections...

Impact of Reservoir Heterogeneity on Steamflood Performance

M. Kumar

Indonesian Petroleum Association

... CIM/SPE 90–96 presented at the Petroleum Society of CIM/SPE International Technical Meeting, Calgary. 23. Voss, R. F., 1985. Random Fractal Forgeris...

Characteristics of Microzonation Modelling in Reservoir Evaluation

Search and Discovery.com

Predicting and Detecting Carbonate Cemented Zones Within Latrobe Group Reservoirs of the Gippsland Basin

Mark Bunch

Petroleum Exploration Society of Australia (PESA)

... if the acoustic properties of the units comprising such features remain constant. The field survey data also bear overprints of both random and coherent noise...

Geomechanical and Flow Simulation of Hydrofracs Using High-Resolution Passive Seismic Images

Alfred Lacazette, William Dershowitz, Jan Vermilye

Unconventional Resources Technology Conference (URTEC)

... as in reflection seismic processing (trace fold). The second stacking step (time fold - summation of time steps) cancels random noise and accumulates...

Abstract: A Regional Erosion Surface and Its Effect on the Smackover Reservoir-Seal System Along the South Arkansas – North Louisiana Jurassic Shelf, by Ezat Heydari and Lawrence R. Baria; #90085 (2008)

Search and Discovery.com

Broadband Seismic Technology and Beyond: Part IV: PGSs GeoStreamer „ Mission Impossible

Lasse Amundsen, Martin Landrø

GEO ExPro Magazine

... a deleterious effect on the seismic wavefield. But, as we explained in the previous articles in this series, if one could have motion sensors together...

Low-Base Frequency Helicopter AEM Data from a Square-Wave System -Helitem2

Adam Smiarowski, Graham Konieczny

Petroleum Exploration Society of Australia (PESA)

... a challenge with airborne EM methods. Although modern systems have been improved with greater primary transmitter moments, noise from receiver coil...

Abstract: Geometry Factor for near Surface Borehole Resistivity Surveys: a Key to Accurate Imaging and Monitioring; #90224 (2015)

Kun Guo, Bernd Milkreit, and Wei Qian

Search and Discovery.com

... could result in systematic errors well above typical data noise level. It is also shown in Yi et al., 2009 that borehole deviation effect may cause...

Maximizing Efficiency of Deep-reinforcement Learning Agents in Autonomous Directional Drilling With Hyperparameter Optimization

Vivek Kesireddy, Georgy Kompantsev, Sheelabhadra Dey, Eduardo Gildin, Enrique Z. Losoya, Narendra Vishnumolakala

Unconventional Resources Technology Conference (URTEC)

... in the environment is sampled from a uniform distribution with parameters [-0.5, 0.5]. Additionally, the effect of the noise is scaled linearly with the speed...

Australian Insights into Streamer Technology Innovations

Andrew Long

Petroleum Exploration Society of Australia (PESA)

... (Hz) noise at tow depths of 7 and 15 m. Unfortunately, as demonstrated above, the effect of the receiver ghost has prevented conventional 100 50...

A Method for Determining the Randomness of Regionally Distributed Quantitative Geologic Data

R. A. Cadigan

Journal of Sedimentary Research (SEPM)

... is objectively subdivided into four areas, and the expected values are computed on the basic assumption that the regional distribution is random...

Effective Use of High Density VSP Measurements to Predict Pore Pressure and Estimate Mud Weight Ahead of Drilling in the Mahakam Delta, Indonesia

Mohammed Badri, Stephane Gazet, Gregoire de Tonnac

Indonesian Petroleum Association

... of incidence would represent true seismic reflectivity. Signal to noise ratio is enhanced with high-density recording and is critical in picking transit...

Acoustic nonlinear full-waveform inversion on an outcrop-based detailed geological and petrophysical model (Book Cliffs, Utah)

Daria Tetyukhina, Stefan M. Luthi, Dries Gisolf

AAPG Bulletin

... effects in the data. Random noise added to the data is rejected by the nonlinear inversion, contributing to improved spatial resolution. The results show...

Clays and Clay Minerals of the Santa Ana River Drainage Basin, California

G. M. McMurtry, Pow-Foong Fan

Journal of Sedimentary Research (SEPM)

.... These factors are the mass absorption coefficient ratios of the phases in question to quartz for the optical slit system used. Background and random noise were...

Abstract: Milankovitch Climate Cyclicity and its Effect on Relative Sea Level Changes and Organic Carbon Storage, Late Cretaceous Black Shales of Colombia and Venezuela, by T. Villamil and E. G. Kauffman; #90988 (1993).

Search and Discovery.com

Assessing Textural Variation in Laminated Sands Using Digital Image Analysis of Thin Sections: RESEARCH METHODS

Elmer H. van den Berg, Victor F. Bense, Wolfgang Schlager

Journal of Sedimentary Research (SEPM)

... elementary area (REA). A too small window introduces random noise in the measured values, a feature known as inadequate sample support (Anguy et al...

The Rise and Fall of a Cratonic Arch: A Regional Seismic Perspective on the Peace River Arch, Alberta

David W. Eaton, Gerald M. Ross, Jacqueline Hope

CSPG Bulletin

... (60, compared with typical values of 10 - 30), providing unusually good attenuation of random noise. In addition, the Lithoprobe data were acquired...

Enso and Sunspot Cycles in Varved Eocene Oil Shales from Image Analysis

Maurizio Ripepe , Lillian T. Roberts , Alfred G. Fischer

Journal of Sedimentary Research (SEPM)

... in 25-year increments, showed generally random distribution of varve thickness, except in a 400-year s gment which yielded two prominent peaks, one at 5.4...

How to Make Good Decisions … Examples From Exploration

Bernhard W. Seubert

Indonesian Petroleum Association

... by Howard and Danbom, Conoco) showed seismic panels generated from purely random noise (Figure 2) to an interpreter who was not aware of the random nature...