Smart eXcitations (SmartX): well testing by sinusoidal stimulation

Smart eXcitations (SmartX): well testing by sinusoidal stimulation

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SmartX is a new way to test oil and gas wells that is faster than current technologies and can be conducted simultaneously on several wells. Furthermore, it can be used with existing wells without any specific preparation and with no significant production loss. SmartX is able to produce estimates much faster than conventional testing. For example it does not test all the frequencies necessary to reproduce a build-up test, but only the faster ones. This is particularly relevant for parameter estimation in short- and medium- term optimisation.
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SmartX is a new way to test oil and gas wells that is faster than current technologies and can be conducted simultaneously on several wells. It also does not require new equipment and involves minimal disruption of production. SmartX uses sinusoidal signals instead of steps to conduct tests, which is effective for short-term optimisation because entire fields can be tested in a few hours. The technique estimates near-well and flow parameters (water cut, gas-oil-ratio, productivity index) along with their error intervals. Furthermore, compared to traditional methods, SmartX can be adjusted to balance between estimation accuracy and production loss. 

The current practice is for wells to be tested every month or even more frequently. Traditional approaches require routing the production of the tested well from the production manifold to an identical testing manifold. This reduces total production and requires operators to pay the extra cost of testing equipment.

 

One of the most common testing methods is the build-up test, which involves halting a stable flow rate from the well being tested. A build-up test can take a few hours to several days, depending on the characteristics of the wells and reservoir. The drawback is that generally only one well at a time can be tested and the "cash flow" is reduced because the output of the well being tested has to be excluded from the production manifold. SmartX offers an alternative method with better performances and an easier setup.

The SmartX approach uses established mathematical tools and allows several wells to be tested simultaneously. Therefore the information from the wells is separated by the application of frequency analysis to the signal from a single flow meter. Furthermore, SmartX can be used with existing wells without any specific preparation and with no significant production loss. Hence it is suitable for continuous background monitoring of well parameters during production.  SmartX is able to produce estimates much faster than conventional testing, because it does not test all the frequencies necessary to reproduce a build-up test, but only the faster ones. This is particularly relevant for parameter estimation in short- and medium- term optimisation.


You can download the SmartX video at the following links:

http://www.iocenter.no/video/smart-excitations-smartx-well-testing-sinusoidal-stimulation-english-video for the English version,

http://www.iocenter.no/video/smart-excitations-smartx-well-testing-sinusoidal-stimulation-portuguese-video for the Portuguese version.

Right click on the video and select Save video as. You need to have a valid IO center account to view and download the video.


You can download the SmartX presentation slides at http://www.iocenter.no/presentation/smartx-project

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