Oklahoma Message Board

Is the initial production shown on a completion report the open choke production or the allowable. Does anyone know the relationship between open choke, reported initial production and allowable? Thanks.

Thanks. I'll have a look.

I became acquainted at the OK-NARO convention with a person with several years experience in production. I asked his opinion about the effect of choke settings on the decline curve of shale gas wells. He said that much is not known for certain, so proprietary competition is generating lots of research and experimentation in perforation and hydraulic fracturing techniques.

He said there is some thought that rapid early production may cause some degradation, i.e., crushing of the grains of sand (proppant) in the fissures created in hydraulic fracturing.

My take-away - shale gas production is still in its infancy, the best is yet to come.

I looked at several completion reports and found a heading, "choke size", with numbers like 17/64", 24/64" and 56/64".I'm not sure how to interpret the numbers. Is 56/64 more open than 17/64 or do the numbers simply mean the size of the choke. It appeared that numbers like 56/64 and 43/64 were associated with wells that are producing at higher rates. For example the 56/64 choke setting was for a well producing 392 barrels of oil and 3,300,000 cf gas/day. The 19/64 choke was associated with a well producing 46 barrels of oil and 2,100,000 cf gas per day. 

Thanks, Jayson. That's very clear and helpful. Larry