Characterizing in-well DAS signal before fiber breakage

Martis James-Ravenell, Ge Jin

International Meeting for Applied Geoscience and Energy (IMAGE)

... vibration magnitude. By assuming the vibration amplitude follows a normal distribution, and accounting for the phase wrapping effect, we estimate...

Time Variations of Natural Gamma Radiation

Robert S. Foote, Nathan E. Frick

Environmental Geosciences (DEG)

..., examines the effect of atmospheric radon daughter radiation measured at the earth's surface on the total measured gamma ray spectrum resulting from...

Detrital Quartz as a Natural Tracer--fourier Grain Shape Analysis

Robert Ehrlich, John J. Orzeck, Bernhard Weinberg

Journal of Sedimentary Research (SEPM)

... - On), where Rn represents the amplitude of the "nth" harmonic and the remainder concerns the phase angle of that harmonic. The set of harmonic...

Understanding Pore Structure of Mudrocks and Pore-Size Dependent Sorption Mechanism Using Small Angle Neutron Scattering

Amirsaman Rezaeyan, Timo Seemann, Pieter Bertier, Vitaliy Pipich, Leon Leu, Niko Kampman, Artem Feoktystov, Lester Barnsley, Andreas Busch

Unconventional Resources Technology Conference (URTEC)

..., the phase behaviour depending on pore size was investigated with subsequent neutron scattering. The results have revealed a vast heterogeneity, which can...

Comparison of Quantitative Mineral Analysis By X-Ray Diffraction and Fourier Transform Infrared Spectroscopy

Paul R. Craddock, Michael M. Herron, Susan L. Herron

Journal of Sedimentary Research (SEPM)

... inversion does not solve for organic matter (kerogen) as a standard phase, and so the reconstructed spectrum is not expected to match the measured spectrum...

Phase Residules Can Help Define Channels, by Marcilio Matos and Kurt J. Marfurt; #41140 (2013).

Search and Discovery.com

ABSTRACT: Ichno-Sedimentological Record of Short-Term Climate-Controlled Redox Events and Cycles in Organic-Rich Strata, by Charles E. Savrda, David J. Bottjer, Katherine Ozalas; #91003 (1990).

Search and Discovery.com

Frequency vs Azimuth (FVAZ): the Younger Member of the Family of Seismic Driven Fracture Characterization Methods

Juan Tavella, Victoria Lazzari, Marcelo Frydman, Néstor Herrera

Unconventional Resources Technology Conference (URTEC)

... from simple power spectrum evaluation results in an effective magnitude that is distorted by the overburden. Thus, to overcome this an inversion...

ABSTRACT: Thermobarometry and geochemistry of gases of veinlet-impregnated mineralisation in deposits of oil- and gas-bearing areas and metallogenic provinces: principles of the geotechnology of the determination of prospects of oil- and gas-presence of

osyp Svoren, Ihor Naumko, Vasyl Hladun, Petro Chepil

Search and Discovery.com

... and their greatly fuller spectrum of the substantial composition towards order of magnitude and more exceed their values in host rocks but the concentration...

Abstract: Nonlinear Seismic Wave Propagation in Heavy Oil; #90224 (2015)

Wubing Deng and Igor B. Morozov

Search and Discovery.com

... Crisco are much weaker and phase-rotated, which suggests that they are caused by contrasts in viscosity. Thus, physical properties such as nonlinear moduli...

Spherical Wave Model Tests of VSP-Based Q-Estimation Techniques

Search and Discovery.com

... disappears with increasing depth. Figure 2 shows log magnitude spectra as generated with Equation (1) for depths from 15m to 61m. The zero-phase (non-causal...

Abstracts: Application of Fractional Fourier Transform in Cepstrum Analysis; #90173 (2015)

K. H. Miah, R. H. Herrera, M. van der Baan, and M. D. Sacchi

Search and Discovery.com

... to obtain both magnitude and phase information of a signal. The motivation of combining the FRFT with homomorphic transform is to take advantage...

Mapping of Salt Structures in the Gulf of Mexico Using Marine CSEM

J.J. Zach, M.A. Frenkel, P. Lindhom, A.M. Ostvedt-Ghazi, A. Kumar, T. Pham

Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)

... coordinate system. The normalization of receiver data relative to the source in both magnitude and phase is conducted with the known source current...

SoundBal: Two-Phase Production Logging by Integrating Mass Balance and DAS-Based Speed of Sound

Peyman Moradi

Unconventional Resources Technology Conference (URTEC)

... information of the cross-spectrum to estimate SoS, prioritizing phase data over amplitude variations. This provides greater flexibility and noise resilience...

Spectral Balancing Can Enhance Vertical Resolution, by Kurt J. Marfurt and Marcilio C. de Matos; #41357 (2014).

Search and Discovery.com

Textural, Elemental, and Isotopic Characteristics of Pleistocene Phreatic Cave Deposits (Jabal Madar, Oman)

Adrian Immenhauser, Yuri V. Dublyansky, Klaas Verwer, Dominik Fleitman, Serguei E. Pashenko

Journal of Sedimentary Research (SEPM)

... of the cavity systems are indicated (CS). B) Portions of the exhumed cavity floor and sidewalls. Phase-I through Phase-IV calcites are indicated. HR...

Spectral hydrology: Resolution and uncertainty in multifrequency oscillatory hydraulic tomography

Jeremy R. Patterson, Michael Cardiff

International Meeting for Applied Geoscience and Energy (IMAGE)

... at a prescribed frequency. The recorded signal is represented by an arriving pressure sinusoid with amplitude and phase delay that can be described...

Vibration Induced Fatigue; Threats and Mitigation

Helge Lawrenz

Indonesian Petroleum Association

... magnitude vibration cycles. Vibrations can be of different excitation sources, with mechanical excitation that is caused by rotating equipment, being one...

Methane-hydrate Laboratory and Modeling Research: Bridging the Gap

Charles E. Taylor, Jonathan Lekse, Niall English

AAPG Special Volumes

... identical. These experiments were repeated a minimum of three times to verify the results. The Raman spectrum of the methane hydrate formed in the F-110...

Analysis of Modern Equatorial Tidal Periodicities as a Test of Information Encoded in Ancient Tidal Rhythmites

Allen W. Archer, Erik P. Kvale, Hollis R. Johnson

CSPG Special Publications

... R. Johnson 1991 189 196 Modelling of tidal rhythmites based on modern tidal data, including a spectrum of diurnal to semidiurnal settings, allows...

Case Studies: Integrated Production Profiling Analyses from Distributed Temperature and Acoustic Data

Yilin Mao, Caroline Godefroy, Alain Gysen

Unconventional Resources Technology Conference (URTEC)

... of the overall signal magnitude within production intervals reveals the production potential of each zone. The algorithm to set production rate ranges from DAS...

Identifying Frac Growth in Multiple Horizons using Integrated Microseismic and Induced Seismic Monitoring Approaches

Ted Urbancic, Andy Cochrane, Sheri Bowman

Unconventional Resources Technology Conference (URTEC)

... moment magnitude from seismic moment, which itself is measured from the long-period spectral amplitudes of the displacement spectrum (see also Baig...

Abstract: Q Estimation by a Match-filter Method; #90174 (2014)

Peng Cheng and Gary F. Margrave

Search and Discovery.com

... the change in the spectra of reflections. The spectrum of the reflected wave is subjected to the tuning effect (Sheriff and Geldart, 1995) of local thin...

Magnetic Spectrum of the San Kampaeng Geothermal Area, Northern Thailand

Somsri Sertsrivanit, Charn Tantisukrit, Surachai Praserdvigai

Geological Society of Malaysia (GSM)

... for the energy spectrum of the magnitude of the magnitic field due to the block in one-direction is given by E(v) = 471^ .K^ .Rj.R|^.[exp( —2hv...

New imaging method of fractured-cavity reservoir based on seismic spectrum decomposition: A case study of the Halahatang Oilfield, Tarim Basin, NW China

Chaozhong Ning, Yong Li, Xingfang Liu, Qi Wang, Xiaojuan Deng, Hongliu Zeng, Yintao Zhang, Xiaoming Wang, Jun He, Weiwei Wang

International Meeting for Applied Geoscience and Energy (IMAGE)

...New imaging method of fractured-cavity reservoir based on seismic spectrum decomposition: A case study of the Halahatang Oilfield, Tarim Basin, NW...