Replies to This Discussion

Permalink Reply by Skip Peel - Mineral Consultant on September 17, 2011 at 16:11

For wells tested on a restricted choke, it is an average Haynesville horizontal well.

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Permalink Reply by Les Bamburg on September 18, 2011 at 15:33

Smith, this is a reasonably good Haynesville Shale well that would have produced +/- 15 MMcfd on a more typical choke size (22/64").

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Permalink Reply by smith1 on September 19, 2011 at 2:05

Does that mean with a restricted choke - that it will possibly produce longer?

Thanks Skip & Les B. Appreciate it.

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Permalink Reply by Skip Peel - Mineral Consultant on September 19, 2011 at 2:37

Yes.  HA operators believe that production on a restricted choke setting slows decline and increases EUR.

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Permalink Reply by Les Bamburg on September 19, 2011 at 2:51

Smith, the producing life would not necessarily be longer but the initial decline rate is much flatter.  For some completion designs this could result in a potential increase in total gas produced over the life of the well. 

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Permalink Reply by smith1 on September 19, 2011 at 2:55

OK, I think I understand, Again, Thanks

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Permalink Reply by smith1 on September 19, 2011 at 3:28

So, to get what it is producing/daily (for use of the royalty calculator) you would divide that 6963 by the # of days stated on the Sonris site. If completed 8/7 - would you use 7 days (give or take?)

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Permalink Reply by Les Bamburg on September 19, 2011 at 4:07

Smith, the 6963 Mcfd (thousand cubic feet per day) is the initial daily production rate.  There should be minimal decline for the first few months so you could use a rate of ~ 6500 Mcfd for an initial estimate. 

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Permalink Reply by Ben on September 19, 2011 at 10:07

The first month of production can be deceiving since unless the well was completed on the first day of the month, the production will be attributable to a time period less than an average of 30.4 days.  It's wise to see what the second and third month of production show before figuring out a monthly average.  Once you have that, you simply divide by 30.4 to get an average daily figure.

 

Few if any wells I've seen actually produce at the IP rate in the Haynesville, so it's great for "flash" but as stated above usually with a 22, 24, o4 26/64" choke.  Even then the higher the IP the higher the rate that the monthly production reflects, usually.  For example, if a well comes in at an IP rate of 20,000 mcf/d, to have it actually produce 300,000 mcf a month (or approx. 10,000 mcf a day is a good thing, and not uncommon.

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Permalink Reply by Les Bamburg on September 19, 2011 at 10:27

Ben, the rate stated was not derived from the monthly production so producing days is not a factor.

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Permalink Reply by Ben on September 19, 2011 at 10:47

Gotcha'.  I was just throwing in my two cents pointing out related observations.  I've been looking at too many of these SONRIS reports for too long, I guess.  The pressures are another thing that I'd like to learn about.  What does the FTP and CP figures have to do with reservoir being robust or better than others.  Is higher better?  On which one, or both?  The SONRIS data is somewhat inconsistent on a well by well basis.  Is there a blog going on that?

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Permalink Reply by Les Bamburg on September 19, 2011 at 11:33

Ben, the higher the flowing pressure the better and you need to look at that in conjunction with the flow rate and choke size.

 

You have to be careful in reviewing the pressure information reported as Haynesville Shale wells actually have a flowing casing pressure because production tubing is typically installed months after the initial test.  For this well the CP is not relevant since the FCP is reported as the FP.

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