Large-scale 3D Inversion of Helicopter Electromagnetic Surveys for Oil Sands Exploration near Fort McMurray, Alberta, Canada; #41303 (2014)

Leif H. Cox, Glenn A. Wilson, Michael S. Zhdanov, Jonathan Rudd, and John Wilson

Search and Discovery.com

... Helicopter time-domain electromagnetic (HTEM) systems have dominated the airborne electromagnetic (AEM) industry for mineral exploration...

Application of Visco-Acoustic Full Waveform Inversion to Shallow-Water, Shallow-Gas Data, #41802 (2016).

Xin Cheng, Ronan Petton, Ian Anstey, Wai-Leong Lai, Denes Vigh, Gavin Menzel-Jones

Search and Discovery.com

... attenuation, respectively. Thus, using the real part only, we obtained a new approximate phase-only visco-acoustic wave equation in the time domain as: (4...

Attenuation of Residual Multiples and Coherent Noise in the Wavelet Transform Domain, by Tamara Pokrovskaia and Richard Wombell; #90037 (2005)

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A Comparison between Geostatistical Inversion and Conventional Geostatistical-simulation Practices for Reservoir Delineation

C. Torres-Verdn, A. Grijalba-Cuenca, H. W. J. Debeye

AAPG Special Volumes

... to a processing step aimed at correcting and reducing the effect of bad caliper readings).Figure 3 is a time-domain cross section of the well-log...

Anomalies Indicate Potential

Aslak Myklebostad, Svein Ellingsrud

GEO ExPro Magazine

... with source signals transmitted as pulses in time domain, result in a deeper imaging as well as the ability to record near-offset data, giving rise...

A New Method of Multiple Attenuation: Multiple Identification and Subtraction

Search and Discovery.com

... transform in time domain provides a further improvement of the resolution in the curvature direction in many cases compared with that in the frequency domain...

Abstract: Time Domain Least-squares Prestack Migration; #90172 (2014)

Ricardo C. Rebollo, Mauricio D. Sacchi

Search and Discovery.com

...Abstract: Time Domain Least-squares Prestack Migration; #90172 (2014) Ricardo C. Rebollo, Mauricio D. Sacchi AAPG Search and Discovery Article #90172...

Weighted stacking of up-and down-going RTM images using peak signal-to-noise ratio analysis

Sérgio Luiz E. F. da Silva, Ammir Karsou, Paulo H. B. Alves, Roger M. Moreira, Jorge Lopez, Marco Cetale

International Meeting for Applied Geoscience and Energy (IMAGE)

... a seismic source estimated following the methodology described in Pratt (1999) and an acoustic modeling engine in the time domain. Figures 4(a) and 4(b...

Computer-Aided Well Log Correlation (1)

J. H. FANG , H. C. CHEN , A. W. SHULTZ , and W. MAHMOUD

AAPG Bulletin

...) also employed cross correlation but, in addition, introduced the Fourier transform to give a "stretched" time domain signal (in order to take care...

Fiber Optic Revelations From a Multistage Open Hole Lateral Fracturing Treatment

Jason Baihly, Allen Dutt, Efejera Ejofodomi, Alex Menkhaus, Paul Dickenson, Colin Wilson, Kevin England

Unconventional Resources Technology Conference (URTEC)

... to achieve distributed fiber-optic measurements is optical time domain reflectometry (OTDR). A pulse of laser light is fired into one end of an optical fiber...

Interpretative Filtering

Leila Ajjabou, Maëlle Bourdais, Natalia Gritsajuk, Sébastien Lacaze, Jean-Philippe Adam

Australian Petroleum Production & Exploration Association (APPEA) Journal

... and geology is better preserved. Finally a back transformation is used to revert to the regular time domain. Extracted artefacts are scanned carefully to ensure...

Bringing ML models into mainstream applications by enabling cloud platform connections

Rafael Pinto, Ilya Agurov, Roman Emreis, Iurii Koniaev-Gurchenko, Dmitrii Zolotukhin, Viktar Huleu, Evgeny Shulikin, Andrey Derevyanka, Pavel Shashkin, Maksim Krug, Ivan Grechikhin, Anton Petrov, Simon Shaw, Brian Macy, Chengbo Li, Chuck Mosher, Anand Malgi

International Meeting for Applied Geoscience and Energy (IMAGE)

...) to calculate the zero-offset reflectivity. Then, we converted the result to the time domain using the P-wave velocity model and applied an antialias...

Illuminating Reservoirs With Electromagnetics

Leonard J. Srnka

Indonesian Petroleum Association

... processing, analysis, and interpretation is performed using frequency-domain multicomponent techniques, although time-domain single-component CSEM...

Seismic Guided Drilling (SGD*): A New Technology for Look-Around and Look-Ahead of the Bit Prediction During Drilling

Nader C. Dutta, Sherman Yang, Jianchun Dai, Aranya Bhaduri, S. Chandrasekhar, Firoze Dotiwala, C.V. Rao

Indonesian Petroleum Association

... and suggested a two-step process to obtain “propagation or rock velocity”: first, perform depth imaging and then go back to time domain...

Analysis of rank-reduction methods for filtering and interpolation

Rafael Manenti, Mauricio D. Sacchi

International Meeting for Applied Geoscience and Energy (IMAGE)

... ∥ dtrue − drec ∥2 2 , (12) where drec is the final 3D time-domain reconstructed data and dtrue is the synthetic true noise-free data. Notice...

Hydraulic fracture aperture estimation using low frequency DAS and DSS in Austin Chalk and Eagle Ford Shale

Xiaoyu Zhu, Jonathan Ajo-Franklin, Julia Correa, Yuanyuan Ma, Jaewon Saw, Linqing Luo, Kenichi Soga

International Meeting for Applied Geoscience and Energy (IMAGE)

... and dynamic Brillouin optical time domain reflectometry (BOTDR)-based system (Luo et al., 2019). DAS has a gauge length of 10 meters, < 1 µe sensitivity and 1...

Modelling pure qP-wave in attenuative VTI media using fractional viscoacoustic wave equation

Shanshan Zhang, Kun Tian, Ning Qin, Yanguang Wang, Changbo Wang

International Meeting for Applied Geoscience and Energy (IMAGE)

... are demonstrated by numerical examples. Theory and method For anisotropic viscoelastic media, time-domain constitutive equation can be expressed as:  σ m...

Finite-difference wavefield propagation using superstepping

T. Nemeth, K. Nihei, A. Loddoch, A. Sekar, K. Bube, J. Washbourne, L. Decker, S Kaplan, Ch. Wu, A. Shabelansky, O. Cristea, Z. Yin

International Meeting for Applied Geoscience and Energy (IMAGE)

... time domain (FD) schemes to advance a wavefield one timestep at a time to perform a matrix-vector multiplication of the current and previous wavefields...

3D inversion of electromagnetic logging-while-drilling data

David Marchant, Nigel Clegg, Luke Rawsthorne, Jari Kunnas

Petroleum Exploration Society of Australia (PESA)

... is a very complex geology. The 3D inversion results provide a much clearer picture. In real-time well placement operations, the 3D inversion will enable...

A novel viscous pure-acoustic wave equation and its numerical implementation in 3D TTI media

Long Wu, Yixian Xu, Shigang Xu

International Meeting for Applied Geoscience and Energy (IMAGE)

... , Transforming eq. (6) to the time-space domain and introducing P-wavefield component P(x, t) and auxiliary component Q(x, t) , we can derive the following...

A Distinctive Rock Type Classification based on Acoustic Impedance Inversion in the Baturaja Carbonate Oil Reservoir, Zulu Field, PHE ONWJ

Atmaji Nugroho, Chandra Sakti, Ermin Retnowati, Said Sabbeq, Zamzam Nurzaman

Indonesian Petroleum Association

..., with only 900 – 1000 ms in time domain. It affects the seismic quality which is ranging from medium to good. The seismic bin size is 6.25 m x 12.5 m...

Effective Fracture Geometry Analysis Based on Data of Well Production, Pressure Gauge, and Strain Change of HFTS-1-III in Eagle Ford Shale

Fatima Almarzoog, Kan Wu, Ge Jin

Unconventional Resources Technology Conference (URTEC)

... fluctuations in the coherent optical time-domain reflectometer along the fiber length, which can be detected by scanning the fiber with a range of laser...

Abstract: Full Waveform Inversion of Crosswell Seismic Data Using Automatic Differentiation; #90187 (2014)

Danping Cao and Wenyuan Liao

Search and Discovery.com

.... The synthetic waveform records were computed using the popular time domain finite difference code. The Ricker wavelet with a central frequency 180Hz...

An Efficient Workflow for Geological Characterization in Unconventional Reservoirs from a New Through-the-Bit Logging Electrical Micro-Imaging Tool, #42334 (2018).

Shiduo Yang, Patrick McBride, Josselin Kherroubi, Alexis He, Isabelle Le Nir, Daniel Quesada, Redha Hasan AI Lawatia, Andy Wray,

Search and Discovery.com

... correction has been developed to incorporate the pipe changes and is based on time domain data directly (Figure 2). The pipe changing interval...

Abstract: Successful Imaging Below Salt: Technique and 2 Case Histories, by R. Marschall, H.-J. Zoch, C. Henke, M. Krieger, and F. Kockel; #90923 (1999)

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