WELLWORX

GREENSHOT

The GreenShot is a multipurpose device for operating oil and gas wells in an optimal fashion

It infers gas production through the casing without measuring it with a standard orifice meter. This is done periodically, say every 5 minutes, by closing the casing valve and measuring 1 minute pressure buildups. Gas traveling through the device during the 5 minute period is calculated using a formula based on real gas laws. The incremental rates are summed using the Trapezoid Rule. At the end of the day, the daily casing rate mcf/d is known. Oil and gas producers have historically not been willing to invest in orifice meters to measure casing gas. Now it is possible as part of a multipurpose device which adds value to the well.

GreenShot® shoots an automatic fluid level using the well’s own energy in a closed system. The method is acoustic. The method is green in that nothing foreign is injected into the well to create the acoustic wave or emitted from the well that pollutes the atmosphere. This is an ideal feature in today’s world wherein oil and gas producers are striving to limit greenhouse gasses in the atmosphere.

The fluid level is used to compute parameters that indicate well production potential. Pump intake pressure (PIP) is a good example. If PIP is high, more production is likely available. If PIP is low, the well is likely producing at capacity at the present pump setting depth. Subtle changes in acoustic velocity are thought to accompany production changes from zone to zone in multiply completed wells.

GreenShot® results are combined with results from the pump-off controller to provide continuous well tests.  Using the downhole pump as a meter, the pump-off controller estimates oil, water and gas produced through the tubing.  GreenShot estimates gas produced through the casing.  This is the total production stream comprising oil, water and gas. This continuous test is helpful in maintaining maximum production. Malfunctions can be found sooner. Remedial action can be taken sooner. Production can be allocated between wells producing into the same tank battery. This information is useful to reservoir engineers in preparing oil and gas reserve reports for management and stockholders. The allocations are done independently from Production Accountants with no human effort.

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The GREENSHOT ADVANTAGE

GreenShot® is a multipurpose device for operating oil and gas wells in an optimal fashion. Its function is threefold.

GreenShot® shoots an automatic fluid level using the well’s own energy in a closed system.

With GreenShot, malfunctions can be found sooner

Results are combined with results from the pump-off controller to provide continuous well tests.

GreenShot estimates gas produced through the casing

The method is green in that nothing foreign is injected into the wellto create the acoustic wave or emitted from the well that pollutes the atmosphere

“Dynamic Wells Require Dynamic Solutions”

Matt Raglin
WellWorx President

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