Can anyone tell me what is happening on this chart?

[energyuser]

Here is a chart from a gas well appox 2900 ft deep. This well is on a pump jack and moves about 14 bbls a day of water. Does anyone know what this pattern represents. We are trying to figure out this. Any help would be appreciated. Here is the link.

http://www.elementsclothing.com/chart/

 

[zdas04]

It looks to me like the pump is gas locking--4-5 times a day the pump is getting enough gas into it to prevent the traveling valve from opening. While the pump is gas locked, the liquid level rises in the wellbore, curtailing production. When enough water leaks past the plunger to break the gas lock then the pump starts pumping again.

This is very common in gas wells with pump jacks.

David Simpson, PE
MuleShoe Engineering

http://www.muleshoe-eng.com

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