Replies to This Discussion

Permalink Reply by Robert on January 20, 2012 at 3:56

The target or formation determines the depth of the well. 

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Permalink Reply by emily amedee on January 21, 2012 at 9:18

THANKS

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Permalink Reply by The_Baron on January 20, 2012 at 4:35

If it was that easy we wouldn't need geologists

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Permalink Reply by Henry on January 21, 2012 at 1:23

emily,

Operators will drill to a depth where they expect to find gas.  Below the surface, gas is not uniformly distributed by depth.  Rather, there are distinct layers where gas can and cannot be found.  Operators know this, based on seismic data and by drilling test wells.  Many of these layers are familiar to readers on this site.  Some of the more common ones we talk about are the Hosston, Cotton Valley, Bossier, and Haynesville formations. 

Also note that a formation such as the Haynesville is developed by what is known as "horizontal drilling."  In other words, the operator drills downward, and then turns the drillbit 90 degrees to run the drillbit horizontally through the formation.  So while the will may be drilled to 10,000 feet vertical depth, the wellbore may run as much as 14,000 feet to account for a 4000' lateral section.  It is this 4000' lateral that is perforated for fracking in the Haynesville Shale.

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Permalink Reply by emily amedee on January 21, 2012 at 9:27

thanks

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Permalink Reply by Les Bamburg on January 21, 2012 at 5:18

Emily, generally wells in deeper formations should produce more than ones in shallower formations but this is not always the case as many other geologic and well completion factors determine initial production rates.

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Permalink Reply by emily amedee on January 21, 2012 at 9:34

At the top of a formation..gas rises..gas is there...easier for drilling co. to extract because of location.

Les, these are statements made but I am not sure what they mean...Can you read  

between the lines here? (for me)  this location seems to be beneficial to the co., but is it to the owners?

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Permalink Reply by Les Bamburg on January 21, 2012 at 9:50

Emily, for the same formation there are many factors that determine the best location for drilling and production.  Some of these include cost of well drilling/completion, oil versus gas, production rate, gas richness, reserve recovery per well, etc.

 

It is not really about gas rising as it is trapped within the formation. 

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Permalink Reply by emily amedee on January 21, 2012 at 10:21

Okay, thanks Les.  I do know that the cost of drilling is going to be less and the site has gas and oil..gas is what they are going for...I'll just have to wait and see how it does!  Thanks again.

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Permalink Reply by Two Dogs, Pirate on January 21, 2012 at 10:32

Emily, where is the property that is being drilled?

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Permalink Reply by emily amedee on January 21, 2012 at 11:00

Permitted in January..not drilled yet.  S9 T19N R1W   CVD Zone Unionville field, Lincoln

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