Energy Resources Program
Wednesday, April 13, 2016
USGS Publication: Open-File Report 2016-1037
As part of a cooperative effort among the U.S. Geological Survey (USGS), the U.S. Department of Energy, and the U.S. Department of the Interior Bureau of Ocean Energy Management, two grids of two-dimensional multichannel seismic reflection data were acquired in the Gulf of Mexico over lease blocks Green Canyon 955 and Walker Ridge 313 between April 18 and May 3, 2013.
Tuesday, August 04, 2015
USGS Publication: Open-File Report 2015-1138
Located approximately 80 kilometers northwest of Anchorage, Alaska, the Susitna Basin is a complex sedimentary basin whose tectonic history has been poorly understood. Recent interpretation of two-dimensional seismic reflection data integrated with well, aeromagnetic, and gravity data provides new insights into the structural and stratigraphic nature of the basin.
Thursday, November 14, 2013
Outside Publication: Department of Energy-National Energy Technology Laboratory The U.S. Geological Survey (USGS) led seismic acquisition in the Gulf of Mexico from April 18 to May 3, 2013, collecting ocean-bottomseismometer (OBS) and high-resolution 2D data at lease blocks Green Canyon 955 (GC955) and Walker Ridge 313 (WR313). This collaborative effort among the U.S Department of Energy (DOE), the U.S. Bureau of Ocean Energy Management (BOEM) and the USGS was conducted to provide improved imaging and characterization of the known gas hydrate accumulations at these study sites.
Friday, August 30, 2013
Friday, January 28, 2011
USGS Publication: Scientific Investigations Report 2011–5005In this study, the connectivity equation (CE), which is a new approach to model non-Archie rocks, is used to correct for the clay effect and is compared with results using the Waxman and Smits method. The CE presented here requires no parameters other than an adjustable constant, which can be derived from the resistivity of water-saturated sediments.
Tuesday, July 20, 2010
USGS Publication: Scientific Investigations Report 2010–5138
Accurate S-wave velocities for shallow sediments are important in performing a reliable elastic inversion for gas hydrate-bearing sediments and in evaluating velocity models for predicting S-wave velocities, but few S-wave velocities are measured at low effective pressure. Predicting S-wave velocities by using conventional methods based on the Biot-Gassmann theory appears to be inaccurate for laboratory-measured velocities at effective pressures less than about 4–5 megapascals (MPa).
Wednesday, March 17, 2010
USGS Publication: Scientific Investigations Report 2010–5013Large amplitude waveform features have been identified in pulse-transmission shear-wave measurements through cylinders that are long relative to the acoustic wavelength. The arrival times and amplitudes of these features do not follow the predicted behavior of well-known bar waves, but instead they appear to propagate with group velocities that increase as the waveform feature’s dominant frequency increases.
The Seismic Data Processing and Interpretation Group performs specialized 2-D and 3-D seismic reflection data processing and interpretation for the Energy Resources Program and other clients upon request using state of the art hardware and software. The Group maintains the National Energy Research Seismic Library (NERSL) and have been acquiring seismic reflection data since the mid 1970's. A primary holding of NERSL is the National Petroleum Researve-Alaska (NPRA) data archive which provides download access to over 12,000 miles of seismic line data.
This site highlights publications, data and other resources of the Seismic Data Processing and Interpretation Group.
Our group is responsible for the operation and maintenance of the USGS Energy Resources Program’s 2-D and 3-D seismic reflection data processing facility located in Denver, Colorado. We process both newly acquired seismic data and re-process older vintage data. These data can be either single- or multi-channel 2-D seismic lines or 3-D seismic data cubes. Also included in our responsibilities are various geophysical analyses of well logs. The end products we generate provide detailed subsurface structural and stratigraphic information which provides the foundation for geologic-based hydrocarbon resource estimations, petroleum reservoir characterization, basin analysis, fluid-flow modeling, geologic framework studies, characterization of petroleum systems, recognition of geologic hazards, and the analysis of hydrologic systems.
We are currently using two Red Hat Enterprise Linux workstations to process our 2-D and 3-D data sets. One workstation is a single-processor Dell Precision T7400 with 16 GB of memory. The second workstation is a single-processor Dell Precision T7500 with 24 GB of memory. We are currently in the process of retiring the Dell Precision T7400 workstation and replacing it with a new dual-processor Dell Precision 7910 workstation with 128 GB of memory. This new workstation will provide a significant upgrade to our processing capabilities. All of our users have the ability to use their desktop PCs to connect to and process on the workstation via a secure connection.
The geophysics group is currently using two different software packages to process seismic data: Halliburton Landmark’s ProMAX and Open Geophysical’s OpenCPS. Historically, our group has utilized ProMAX for the majority of our seismic processing, but we are transitioning to using OpenCPS as our main processing package. Using ProMAX, our processors have access to both ProMAX 2-D and ProMAX 3-D; while using OpenCPS, our processors have access to the time, Kirchhoff depth, advanced land and marine packages. Additionally, our processors often write their own software modules and scripts to customize their workflows.
For interpreting and visualizing seismic and well data, we utilize two PC-based software packages: IHS Kingdom Suite and LMKR GeoGraphix. The majority of our interpretation projects are completed using Kingdom Suite. Our interpreters have access to tools to complete processes such as synthetic seismogram generation, well log display, correlation, and interpretation, velocity analysis, and 3-D visualization. We also use ESRI ArcGIS for map generation and GIS analysis, and Blue Marble Geographics’ Geographic Calculator for coordinate system transformations and calculations.
The Seismic Data Processing & Interpretation group manages a large quantity of information that we are working to make accessible through this website. At this time, two collections of data are available which include
National Archive of Marine Seismic Surveys The National Archive of Marine Seismic Surveys (NAMSS) is a marine seismic reflection profile data archive.
Antarctic Seismic Data Library System for Cooperative Research (SDLS)
Page Last Modified: Tuesday, April 18, 2017