Mobile Shale in the Niger Delta: Characteristics, Structure, and Evolution

Richard W. Wiener, Michael G. Mann, Michael Terry Angelich, Joseph B. Molyneux

AAPG Special Volumes

...; obs. = observed; 50 km = 31.1 mi.Regional seismic velocity data were used for depth conversion of seismic lines and analysis of regional velocity...

Elastic full-waveform inversion using random space shift

Yuhui Yao, Jizhong Yang, Yuzhu Liu

International Meeting for Applied Geoscience and Energy (IMAGE)

... than AFWI due to the slow S-wave velocity which requires a more accurate initial model than Pwave velocity, together with the existence of tradeoff...

Integrated 3D Seismic Data Modeling and Processing Methodology for Structural Model Analysis: Case Study

T. Salinas

Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)

... (PSDM) that requires perform a careful interpretation in depth as the seismic velocity behavior is modeled. The availability of this structural...

Practical solutions for reflection-driven FWI and application to Gulf of Mexico datasets

Max Liu, Ren-douard Plessix, Yi Yang, Jeffrey Vander Hurst, Na Shan, Rob Schelstrate, Colin Perkins, Vanessa Goh

International Meeting for Applied Geoscience and Energy (IMAGE)

...-depth ambiguity, and acoustic and shear impedance imprints in velocity updates. In this paper we dive deeper into some of these issues and discuss...

Interpretation of first-arrival times of borehole acoustic measurements acquired in high-angle wells using 3D eikonal numerical simulations

Feiyue Xia, Carlos Torres-Verdín

International Meeting for Applied Geoscience and Energy (IMAGE)

... and that the wave traveltime is only affected by velocity variations on the traveling path (Červený, 2001). Wang et al. (2017) applies a simplified raytracing...

New Insights into the Deep-Water Otway Basin - Part 1. Integrated Depth Imaging Workflows Unravelling the Subsurface

Si Ying Lee, Bee Jik Lim, Arwindran Anantan, Alexander Karvelas

Australian Petroleum Production & Exploration Association (APPEA) Journal

... velocity variations of the major geological units whilst maintaining the depth consistency at the intersection location of all the 2D lines in both dip...

Seismic geomorphology and sedimentology of a fluvial-dominated delta: Implications for the Neogene reservoirs, offshore Bohai Bay Basin, China

Shang Xu, Fang Hao, Changgui Xu, Huayao Zou, and Baishui Gao

AAPG Bulletin

... are identified. Seismic facies 1 displays discrete high-amplitude reflection and a distinct U-shape incision. In plan form, this seismic facies shows a linear...

A Geomaterials Approach to Fault-Zone Characterisation; #41693 (2015)

Gary D. Couples, Helen Lewis, Elma Charalampidou, Jingsheng Ma, Antonio Zamarron

Search and Discovery.com

... surface may occur in limited cases, that is not the usual response • Typical: lozenge-shaped, en echelon regions of high shear strain, with both...

A deep-learning workflow for weak reflection extraction in pitch-catch measurements in cased-hole

Qiang Wang, Hua Wang, Shaopeng Shi

International Meeting for Applied Geoscience and Energy (IMAGE)

...ut the active learning strategy. Fig. 9 The A0 and TIE boundary picking by solving Eikonal equation. (a) A0 pseudo-velocity map; (b) Calculated A0 travelti...

Abstract: Stratal Slicing and Seismic Facies Imaging, by H. Zeng and N. Tyler; #90937 (1998).

Search and Discovery.com

Brine volume and salt dissolution rates in Orca Basin, northeast Gulf of Mexico

Robin S. Pilcher, Raleigh D. Blumstein

AAPG Bulletin

... and 4.3 mi) (Figure 2). The midwater seismic reflector occurs at a TWT of 3005 ms, equating to a depth of 2251 m (7385 ft) if an average seawater velocity...

Workflow for a joint inversion of gravity and gravity gradients for environmental applications

Luigi Bianco, Mojtaba Tavakoli, Andrea Vitale, Maurizio Fedi

International Meeting for Applied Geoscience and Energy (IMAGE)

... the structural similarity between different physical parameters, such as for instance seismic velocity and density, or others. Among others, we...

ABSTRACT: Converted Shear-Wave Anisotropy Attributes for Fractured-Reservoir Management; #90013 (2003)

JAMES E. GAISER, RICHARD R. VAN DOK

Search and Discovery.com

... with the engineering data. P-wave AVO/AVA and azimuthal velocity anisotropy analyses can be important for inferring fracture properties (e.g., Hall et al., 2000...

Mechanics of low-relief detachment folding in the Bajiaochang field, Sichuan Basin, China

Andreas Plesch, John H. Shaw, David Kronman

AAPG Bulletin

... of approximately 300 km2 (115 mi2). Data were acquired down to 5 s two-way traveltime (TWT), corresponding to approximately 10 km (6 mi) depth...

Abstract: Microseismic Event Locations Uncertainity and Acquisition Geometry; #90224 (2015)

Amna Feroz and Mirko van der Baan

Search and Discovery.com

... uncertainty in microseismic event locations. Uncertainties in microseismic event location arise due to several factors, including inaccurate velocity model...

Three-Dimensional Seismic Analysis in the Characterization of a Giant Carbonate Field, Onshore Abu Dhabi, United Arab Emirates

Peter Melville, Omar Al Jeelani, Saeed Al Menhali, Jürgen Grötsch

AAPG Special Volumes

... with arrows).The combination of the 3-D seismic data and the well data to make a depth map has revealed a very good relationship of velocity to depth...

Onshore–offshore correlations of Cretaceous fluvial-deltaic sequences, southern Baltimore Canyon trough

William J. Schmelz, Kenneth G. Miller, Gregory S. Mountain, James V. Browning, and Kimberly E. Baldwin

AAPG Bulletin

... surveys were primarily used to convert log measurements and biostratigraphic picks from depth to two-way traveltime (TWTT). Regional Time–Depth...

Pushing the boundary of WAZ streamer data for subsalt imaging: A case study in deepwater Mexico Campeche

Yi Chen, Kendra Pyke, Juan Wang, Jasmeen Moubarak, Earl Manning, Jessica Kopp, Rongzhang Chen, Chang Chen, Ravi Kumar, Minshen Wang, Sabaresan Mothi

International Meeting for Applied Geoscience and Energy (IMAGE)

... is at the confluence of multiple structural domains, including a complex and extensive salt canopy, creating significant challenges for velocity model building...

Hydraulic Stimulation in a Tight Gas Reservoir: Insights from Microseismic and Geomechanical Modeling and Interpretation

Claudio Rabe, Pierre-Francois Roux, Luisely Linares, Maximiliano Garcia Torrejon, Luis Alberto Vernengo, Diego R. Lachter

Unconventional Resources Technology Conference (URTEC)

... optimization in the deep tight gas well targeting Lajas Formation at 4300m depth, in Neuquén basin, onshore Argentina. The objectives of this work were (1...

Origins of overpressure in the central Xihu depression of the East China Sea shelf basin

Jun Li, Jingzhou Zhao, Zhiqiang Hou, Shuping Zhang, and Mengna Chen

AAPG Bulletin

... with the normal compaction trend or conforms to a higher level of normal compaction as the depth increases. In the sonic velocity–effective stress diagram...

Vertical anomaly clusters: Evidence for vertical gas migration across multilayered sealing sequences

Martino Foschi, Joseph A. Cartwright, and Frank J. Peel

AAPG Bulletin

... with the DSDP wells.Figure 3.(A) Representative 2-D seismic line [cutoff at a depth of 4s two-way traveltime (TWT)] passing across the study area (see Figure 1C...

The Fabric, or Internal Structure, of Rocks … The Patterns of Anisotropy; #42188 (2018)

Heloise B. Lynn

Search and Discovery.com

..., but has left in the azimuthal traveltime wobble (see red arrow). (b) Initial ORT common image gather. The ORT velocity field has specified the VTI and HTI...

Fit For Purpose Integrated Structural Identification Using Azimuthal Monopole Sonic Waveforms and Vertical Seismic Profiling: The First Case Study From The Vertical Unconventional Well in North Sumatera Basin - Indonesia

Erfandi Adhiansyah, Annisa Nur Mahdiya, Murthala Hatta, Irma Eliza, Barry Albert Lumankun

Indonesian Petroleum Association

... of the source offset. The process for producing the image involved building a velocity model. The velocity was derived from the time-depth relationship...

Seismic Stratigraphic Study of Two Oxfordian Carbonate Sequences, Eastern Saudi Arabia

George S. Langdon , Steven J. Malecek

AAPG Bulletin

...: (A) interpreted seismic data, (B) input velocity/depth model, and (C) synthetic section. End_Page 412------------------------------ Further evidence...

4D Finite Difference Forward Modeling within a Redefined Closed-Loop Seismic Reservoir Monitoring Workflow, #41922 (2016).

David Hill, Dominic Lowden, Sonika, Chris Koeninger

Search and Discovery.com

.... Such an in depth understanding cannot be achieved using one of the more traditional Sim-to-Seis type workflows. Introduction The history of closed-loop seismic...