Would you like to start a free subscription?
Remember me | Forgot password
For full content view: Log in Now!
The Virtual Source (VS) idea is to reconsider receivers of wave energy as virtual sources with a known and controllable output waveform and radiation pattern for a wide range of conditions. This idea allows us to improve what we can do with physical sources and leads to many new possibilities, some described below, and many more to explore.
Acoustic waves going through a receiver are measured and recorded in various ways. These measured signals may be filtered to a desired waveform and selectively weighted and summed. This allows us to mathematically build a virtual source with the known desired waveform radiating from our illuminated receiver.
Properly designed downhole geophone configurations allow wave energy to pass through the virtual source receiver to the target and scatter back wave energy to this and other receivers. With this in mind, we can mathematically create a source that is as unobtrusive and cheap as a geophone . . .
This area of the site is restricted.
In order to gain access, please either Log
In, or subscribe to World Oil.
Two options are available to you for creating an account.
1. Get a Free Trial Subscription to World Oil Magazine and gain immediate access to select content on World Oil Online.
Start a Free Trial Subscription and gain immediate access to the complete current issue of World Oil Magazine. Plus, you’ll receive 3 upcoming issues of World Oil Magazine in print or digital format.* You also receive access to the Energy Events Calendar, Industry Statistics and WO Wire’s news and industry coverage.
2. Purchase a subscription to World Oil magazine and gain immediate
and complete access to World Oil Online. As a Total Access subscriber
you will have access to all areas of the site available to registered users and
free subscribers as well as having access to such premium content areas as:
Physical copies of this content may be available for purchase. Visit the Reprints & Back Issues section.
If you are already a paid subscriber and do not have access, please email CustomerService@worldoil.com.
World Oil's specialized upstream Engineering Data Tables featuring the Drill Bit Classifier, Tubing Tables and more. Get Total Access today.
Kuala Lumpur - March 25-28
The Woodlands, TX - April 1-3
Houston, TX - April 6-9
All material subject to strictly enforced copyright laws.
© 2014 World Oil. © 2014 Gulf Publishing Company.