Well Results

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Permalink Reply by Roger on February 1, 2010 at 2:32pm

Serial #239521

COMPLETED 9-28-09; GAS; HAYNESVILLE RA; 5432 MCFD; 10/64 CHOKE; 21 GVTY; 7635# CP; PERFS 12,340-15,769' MD; 11,993-12,011'

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Permalink Reply by Les B on February 1, 2010 at 3:04pm

Roger, although the rate may look low, the well was tested on a small choke size. If opened up further, the well should be able to flow closer to 15 MMcfd. This well is further south than any previous horizontal Haynesville Shale well in Louisiana and the lateral length was shorter than many other wells. The test rate was comparable to Chesapeake's Nabors Logan 34 #H1 Well.

Forest, Black Stone Min 26 #H1 Well, Serial #239521, S26-T8N-R14W, Sabine Parish, 5432 Mcfd, 10/64" Choke, 7635 psi Flowing Pressure

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Permalink Reply by Roger on February 1, 2010 at 5:11pm

Les B,

Thanks for the information. This is exactly what I wanted to hear. Hopefully, the wells nearby will have the same (or better) production.

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Permalink Reply by Roy on February 4, 2010 at 5:14am

Les B
Could you explain the relationship of IP in Mcfd, choke fraction ie. 10/64 and psi flowing pressure. Are there equations used from these variables? How is EUR determined? I am trying to get my head around these numbers, how they relate and are used.

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Permalink Reply by Les B on February 4, 2010 at 9:56am

Roy,
For a given well the larger the choke size, the higher the flow rate (Mcfd) but the lower the flowing wellhead pressure. There are limits because opening the choke too much could result in a very high flow rate that would damage the reservoir and/or equipment. Also the flowing wellhead pressure must be greater than the line/separator pressure (~ 1000 psi).

There are theoretical relationships between choke size and flow rate with complex equations but for a given well the operator would use actual test rates with different choke sizes to derive a more accurate understanding.

For a given development such as the Haynesville Shale, operators develop "type curves" for estimating EUR (estimated ultimate recovery) based on a well's early production history. Actual production history is a better indicator of expected EUR than the reported initial flow rates.

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Permalink Reply by Henry on February 1, 2010 at 4:09pm

Roger,
I'd be happy to have that well.

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Permalink Reply by ken hatcher on February 1, 2010 at 5:49pm

Les, with the long lateral on the comstock well at noble perhaps maybe we can have a better understanding...??

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Permalink Reply by Les B on February 1, 2010 at 11:22pm

Ken, given Comstock's past success I would definitely expect this well to have excellent results.

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Permalink Reply by qwert on February 1, 2010 at 6:54pm

For what it's worth, in a press release on November 2, 2009, Forest Oil self reported this well at 21mmcfe/day (the press release is posted on their website). The release is a little vague and reports two IP's for two wells that are only identified by completion date and order. The SONRIS information for the Blackstone well corresponds with the completion date (October of 2009) and order (3rd) for the 21 mmcfe well. I realize the company releases are not always the most accurate indication of the IP, but just thought it was worth noting.

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Permalink Reply by ken hatcher on February 1, 2010 at 9:15pm

Well, whatever it was it sparked some activity in the area and it is still going on!

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Permalink Reply by Les B on February 1, 2010 at 11:16pm

Qwert, well spotted!! I concur the Forest news release tags the Black Stone 26 well at 21 MMcfd and the Madden 18 well at 15 MMcfd (Sonris - 14,829 Mcfd). I could definitely see the Black Stone well flowing at this high rate the given test rate on the small choke size.

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Permalink Reply by qwert on February 2, 2010 at 6:16pm

Thanks. i just noticed a typo in my earlier post -- the completion date for Forest's third well which they reported at 21 mmcf was September (not October) in both the press release and SONRIS information, which, again, corresponds to the Black Stone well. I think this is good news for Sabine Parish, and I'm glad to see it.

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