Deepwater Santos Basin: Extending the Pre-Salt Play Outboard

Cian O'Reilly, James Keay, Jianli Song, Griselda Martinez, Seung Yoo, Taejong Kim, Eric Newman, Pedro Zalan, TGS

GEO ExPro Magazine

... acquire 3D multi-client seismic in the outboard South Santos? Because it is prospective! TGS (acquisition years 2000–2001) and Spectrum (acquisition...

Source Rock Maturity Assessment Using the Advanced Surface-enhanced Raman Spectroscopy

Yao Li, Le Lu, Sheng Wu, Yongchun Tang

Unconventional Resources Technology Conference (URTEC)

...). The Raman spectrum of organic matter consists of the disordered (D) band and the graphite (G) band. The G-band is associated with the in-plane vibration...

Abstract: Removing Blended Sources Interference Using Stolt Operator; #90224 (2015)

Amr Ibrahim

Search and Discovery.com

... in the frequency domain. Unfortunately, the best Radon basis that fit the data use hyperbolic or apex shifted hyperbolic travel times which are time variant and so...

Abstract: Robust Surface-Consistent residual Statics and Phase Correction…Part 1; #90224 (2015)

Nirupama Nagarajappa and Peter Cary

Search and Discovery.com

... deconvolution (Cary et al. 1993) is to attempt to whiten the amplitude spectrum and zero the phase. Due to noise and other factors, we expect that phase errors...

Chapter 5: Seismic Trace Inversion

Tom Wittick

North Texas Geological Society

... frequency, quickly varying wiggles on the log, but there is also a very slowly varying trend function that is generally increasing with depth. This low...

Marine Seismic Sources: Part IV

Lasse Amundsen, Martin Landrø

GEO ExPro Magazine

... scrutiny is mid-frequency sonar, which can produce sound at levels of up to 237 dB re 1uPa @ 1m at frequencies between 2-8 kHz (see GEO ExPro Vol 7 No 4...

Seismic Trace Inversion

Abilene Geological Society

.... There are many high frequency, quickly varying wiggles on the log, but there is also a very slowly varying trend function that is generally increasing with depth...

Enhancing Reservoir Imaging and Monitoring Using Crosswell Seismic

Sanjeev Dogra, Ajay Nalonnil, Bruce Marion

Indonesian Petroleum Association

... frequency shift method to estimate Q based on average frequency. The frequency corresponding to the centroid of the power spectrum of a wavelet...

Appendix A: Considerations for Optimum 3-D Survey Design, Acquisition and Processing

R. Malcolm Lansley

AAPG Special Volumes

..., and that the amplitude spectrum of the source wavelet that was introduced into the subsurface was flat. If these assumptions are not satisfied...

Seismic Exploration for Stratigraphic Traps: Geophysical Exploration Methods

Paul L. Lyons, M. B. Dobrin

AAPG Special Volumes

... the spectrum thus obtained, the higher will be the frequency of the events on the resulting seismogram; and the ultimate objective of such processing...

Quantitative analysis of DAS recorded P-wave generated by perforation shots

Peiyao Li, Ge Jin

International Meeting for Applied Geoscience and Energy (IMAGE)

... of the shot gather. The signal travels with the same velocity as at frequency will stack constructively and become peaks in the dispersion spectrum. Examples...

A Big Fan of Signals? Exploring Autogenic and Allogenic Processes in Lobyte3D, a Numerical Stratigraphic Forward Model of Submarine Fan Development; #51593 (2020)

Peter Burgess, Isabella Masiero, Stephan Toby, Robert Duller

Search and Discovery.com

..., even in the absence of any allogenic signal, with cycles and trends in bed thickness, but no single characteristic frequency. In the oscillating supply...

Understanding Frequency Decomposition Results Using Forward Modeling to Correlate Geology With Frequency Responses

Search and Discovery.com

Abstract: Time-varying Wavelet Estimation and Deconvolution; #90171 (2013)

Mirko van der Baan

Search and Discovery.com

... method proposed by Wiggins (1978). They search for a constant phase rotation (i.e., a frequency independent one) that renders the data maximally...

Abstract: A New Method for Microseismic Event Detection and Automatic Time Picking; #90187 (2014)

Yoones Vaezi and Mirko van der Baan

Search and Discovery.com

... spectrum density of the data is dominated mostly by the ambient noise and is quite different from that of microseismic events. Therefore, depending on how...

Geometric mode decomposition method for diffraction separation

Peng Lin, Suping Peng, Yang Xiang, Chuangjian Li, Xiaoqin Cui

International Meeting for Applied Geoscience and Energy (IMAGE)

... slice of the f-x spectrum and ignores the close relationship between different frequency slices. In addition, the geometric information of signals...

Wavelet Processing

Lee Lu

Indonesian Petroleum Association

... frequency content. A record of synthetic data having unit amplitude sine waves (8-100 Hz) is generated for this demonstration (Figure 1 (a)). Figure 1...

Subsurface monitoring during tunnel excavation area using auto-correlation

Enhedelihai Nilot, Gang Fang, Yun Zhou Tan, Yanlong Niu, Heng Zhang, Yunyue Elita Li

International Meeting for Applied Geoscience and Energy (IMAGE)

... PSD in the frequency band of 1-100 Hz. The averaged spectrum showed some difference: in the band of 30-50 Hz, the energy becomes larger, while the PSD...

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

Abdul Haris, Ahsanul Khair

Indonesian Petroleum Association

...Frequency Gradient of Spectral Decomposition for Identifying Hydrocarbon Reservoir … Example from Indonesian Field Abdul Haris, Ahsanul Khair...

Least Square Q-Kirchhoff Migration: Implementation and Application

Xiaodong Wu, Yi Xie, Joe Zhou, Dechun Lin, Yu Wang

Petroleum Exploration Society of Australia (PESA)

... is the reference frequency. Equation (1) normally is solved in least square sense (Nemeth et al., 1999), m = argminm0 ‖d − LQ m0 ‖ 2 (2) Problem (2) has...

Micro and Macro-Scale Investigation of Cementing Characteristics of Gas Hydrates, by Jinhai Yang, Bahman Tohidi, and Ben M. Clennell; #90035 (2004)

Search and Discovery.com

Advances in Geophysical Techniques for the Detection of Drilling Hazards and Their Application to Seismic Exploration

D. C. N. Pratt, Tong Pow Mun

Southeast Asia Petroleum Exploration Society (SEAPEX)

... equations. “Geophysics”, V 50, pp 609–614. 5. Taner, M.T., and Sheriff, R.E., 1977, Application of Amplitude, Frequency and Other Attributes...

Seismic signal considerations for fast reservoir characterization

Folkert Hindriks

International Meeting for Applied Geoscience and Energy (IMAGE)

... to approximate a bandlimited impedance representation by phase rotating the reflectivity trace and shaping the signal spectrum, either by applying a direct...

Spectrofluorometric Determination of Sand Tracer Concentrations: RESEARCH-METHOD PAPER

Raymond S. Farinato, Nicholas C. Kraus

Journal of Sedimentary Research (SEPM)

... is lost to molecular motion, resulting in scattered photons of lower frequency. Both the absorption and emission characteristics (wavelengths...

Characterization and simulation of transverse noise waves of a multisensor solid streamer

Viktor Smirnov, A. Sourice, J. Ribette, J. Mars, P. Herrmann

International Meeting for Applied Geoscience and Energy (IMAGE)

... spectrum. The angle and frequency dependent reflection of the seismic wavefield at the water-air interface causes destructive interference...