- published: 29 Aug 2011
- views: 393746
This short video shows in a simple way what three-dimensional seismic cube is, explains why it is more beneficial compared to 2D modification, and gives you an idea of how scientists use it. The idea to use three-dimensional seismic method for displaying geological structures appeared several decades ago, however its extensive use began only 10-15 years ago. 3D seismic acquisition, processing and interpretation requires significant resources, but the quality and value of the results are worth the cost. 3D seismic is most widely applied in offshore petroleum industry, where it provides crucial geological information and helps to significantly reduce the financial risks at the following drilling stage. Interesting facts • Despite the high costs, US Gulf of Mexico performs almost ubiquitous ...
Reflection seismology (or seismic reflection) is a method of exploration geophysics that uses the principles of seismology to estimate the properties of the Earth's subsurface from reflected seismic waves. The method requires a controlled seismic source of energy, such as dynamite/Tovex, a specialized air gun or a seismic vibrator, commonly known by the trademark name Vibroseis. Reflection seismology is similar to sonar and echolocation. Refraction seismology is a geophysical principle (refraction) governed by Snell's Law. Used in the fields of engineering geology, geotechnical engineering and exploration geophysics, seismic refraction traverses (seismic lines) are performed using a seismograph(s) and/or geophone(s), in an array and an energy source. The seismic refraction method utilizes...
Total E&P Nederland has been producing gas in the Dutch continental shelf area since the 1970s. The most recent seismic studies of Total's acreage in the Dutch sector of the North Sea are already 20 years old. This fact, together with declining production and the improvements in production techniques over the years, meant that a seismic feasibility study was essential. The project has a number of distinct stages: the feasibility study, the tender procedure, data acquisition and data processing. The feasibility study was completed towards the end of 2011 and established the parameters for the survey. Five seismic survey companies entered bids for the project, and Fugro Geoteam AS was awarded the contract, worth tens of millions dollars. This 3D seismic project is of immense strategic ...
Lønneberget presents SHIPMAP, a new way to process seismic data, and an idea of how you can make the geological model "on-the-go" as the seismic surveying is taking place. Our idea is represented with a movie made in Adobe AfterEffects.
BroadSeis is the CGG broadband marine solution, combining industry-leading equipment, unique variable depth streamer acquisition techniques and proprietary deghosting and imaging technology. Over 270,000km2 of BroadSeis 3D, including 70,000km2 of BroadSource and 33,000km2 wide-azimuth data has been acquired. From shallow water North Sea and Indonesian prospects to deep water Gulf of Mexico and West Africa, we have demonstrated BroadSeis' ability to emit, record and process six octaves of data, including ultra-low frequencies in the 2.5 - 5 Hz range, enhancing penetration and illumination below complex overburdens such as subsalt and sub-basalt environments.
John N. Louie, Applied Geophysics class at the University of Nevada, Reno, Lecture 7. http://crack.seismo.unr.edu/ftp/pub/louie/class/492-syll.html Reflection principles - profiling, sounding, NMO, dip. Text: 4.4.3-4.4.8, p. 176-186: W. Telford, L. Geldart, and R. Sheriff, Applied Geophysics, Cambridge Univ. Press, ISBN 0521339383. Seismic overheads 1: p. 33-37: http://crack.seismo.unr.edu/ftp/pub/louie/class/492/overheads/Seismic1.pdf Process your own seismic data with the point-and-click, open-source JRG/Viewmat system from http://crack.seismo.unr.edu/jrg
Seismic processors are Geophysicists who turn raw seismic (earth vibration) data into a true representation of the subsurface, which helps organizations choose drilling sites for oil and gas reserves.
A helpful animation and explanation of how geoscientists use 3D seismic exploration to find and drill for oil and natural gas energy fuel sources with great accuracy despite those energy resources being buried deep beneath the ground.
This short video explains -- to a non-seismologist -- the concept of seismic migration. Common Midpoint Stack, which was state of the art until the early 1970's, was able to produce seismic images with good signal-to-noise. However, the seismic events tend to be mis-positioned and cross one another, particularly when there is geologic dip. Migration is the process of correcting these dip and positioning errors as an automatic digital procedure. Only the seismic velocity must be known (which, unfortunately, is no small feat in many areas!).
Seismic exploration The second part of the new Wintershall series on oil looks at seismic exploration. Wintershall uses modern technologies such as 3D and seismic surveys to increase the discovery rate of crude oil.
Video from the Geo ExPro article: Augmenting Seismic in Challenging Resource-Rich Areas. Just as 3D seismic improved oil and gas exploration, new technology is helping identify oil and gas resources in high definition in areas of permafrost, volcanic cover and heavy oil. Authors: Cheryl Goreski, Quantec Geoscience and Alysha Dominico, Tangible Words
John N. Louie, Applied Geophysics class at the University of Nevada, Reno, Lecture 9. http://crack.seismo.unr.edu/ftp/pub/louie/class/492-syll.html Reflection acquisition - phases, spatial aliasing, spreads, stack chart, signal/noise, field strategies. Text: 4.5.1-4.5.2, p. 186-192: W. Telford, L. Geldart, and R. Sheriff, Applied Geophysics, Cambridge Univ. Press, ISBN 0521339383. Seismic overheads 2: p. 1-52: http://crack.seismo.unr.edu/ftp/pub/louie/class/492/overheads/Seismic2.pdf Process your own seismic data with the point-and-click, open-source JRG/Viewmat system from http://crack.seismo.unr.edu/jrg