Pads, Wells, and Laterals

How many wells would a PA well pad have?

 

How many laterals does a single well have? 

 

If a well pad diagram showed 6 laterals 1H, 2H, 3H etc. are they single or separate wells?

 

If these laterals are from a single well head, is production then measured as the sum of all laterals passing through the well head? 

 

What would typical production be from a single average marcellus lateral? As an example, If it was 5, would 3 laterals all producing 5 separately equal 15 for the well production of that month? 

 

Any answers appreciated.

 

 

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Permalink Reply by Tom Copley on January 25, 2011 at 11:21am

Farmhouse-- I'll take a stab at your questions:

#wells/pad        6

#laterals/well    1

Q, well pad diagram showed 6 laterals - single or separate?   Ans. Separate

Production measured from one well with one lateral

Production per well average ~~ 5 Mmcf/d with one lateral

Also, this wiki page on pad drilling might help.

--Tom
Permalink Reply by Tim Hale on January 27, 2011 at 4:25am
actually its up to 8 wells per pad.....4 going to the NW and 4 to the SE....all hort. wells with a lateral lenght of between 3,000-6,000 ft.....average production of 5-10K per day to begin with....a rather quick decline in 18 months and then stable production for the remain 15 - 20 years.
Permalink Reply by Farmhouse on January 25, 2011 at 12:54pm
Thanks Tom. Very Helpful.
Permalink Reply by Tim Hale on January 27, 2011 at 4:25am
a 5 ac pad drains 640 ac....1 square mile
0jw0dsu4txfuvPermalink Reply by 0jw0dsu4txfuv on January 27, 2011 at 4:47am

Presently in PA one Operator has 16 wells on one pad. There is some talk of multiple laterals from a single well bore. This is a practice that has been done in Austin Chalk and over areas. There are

wells now being tested at much higher flow rates but the gas transmission system can't handle the

volume. Honestly PA this is going to be such a good thing for us. We need to keep our govt. to take care and be responsiblw witht the everance taxes that will come.

Cheers

 

Permalink Reply by Mr. Majik on January 27, 2011 at 4:48am

That Wikimarcellus page has a serious piece of misinformation, or at least misleading information.  It says, "Typically the land required for a well pad is rectangular--usually about one half mile wide by two miles long with the pad itself positioned in the center of the rectangle."  In fact, the land area of one half by two miles is known as the spacing unit, unit, or pool.  The majority of that area will remain undisturbed at the surface.  The pad is the working surface area that must be cleared, leveled, and surfaced for the drilling rig, trucks, and other equipment needed to drill and complete the wells.  Typically the pad is just a few acres.

Permalink Reply by Tim Hale on January 27, 2011 at 5:03am
you guys are both correct........4-6 laterals going NW and 4-6 going in line to the SE....and it is a rectangular shape
Permalink Reply by Tom Copley on January 27, 2011 at 5:54am
Majik-- Thank you kindly for the correction. I actually knew that--it was merely sloppy writing on my part to leave the reader with the thought that a well pad required the entire spacing unit. I have rewritten the paragraph using a few of your own words. The wiki is a work in progress, so PLEASE, PLEASE feel entirely free to challenge anything you see in it that doesn't sound quite accurate, and if you have suggestions, don't be shy. The more accurate and complete, the better a community resource it will be. My email is tcopley@wikimarcellus.com --Tom
Permalink Reply by Hunter on January 27, 2011 at 8:29am
I'm confused gentlemen.  Is the average production per day for each well with 1 lateral ~5 million cu ft per day (Mmcf/d) or 5-10 thousand (K) per day?  Saw both answers in the comments/replies.  Help me out with this example:  If a pad has 6 wells (bore holes), each well bore has 1 lateral (3,000-6,000 ft), does that makes 6 laterals each producing ~5 million cu ft per day, that then totals ~30 million cu ft per day for all 6 well bores???  Thank you.
Permalink Reply by Tim Hale on January 27, 2011 at 8:34am
wells vary....but the answer to you question is 6 wells would do, on average, approx. 30,000 million BTU (or dekatherms or 1000 cublic feet) per day in the first year or two
0jw0dsu4txfuvPermalink Reply by 0jw0dsu4txfuv on January 27, 2011 at 8:54am
Mr Hale I don'y know your vocation here but I have seen some wells better than five and a bunch around 3 and we really don't know how long they are going to last.
Permalink Reply by Tom Copley on January 27, 2011 at 9:18am

Rural-- The 5 million cubic feet of natural gas per day (Mmcf/d) is an average per well, but actual production is quite variable and depends upon many factors. For example, wells in northeastern Pennsylvania tend to be more productive than ones in the east central part of the state. In the northeast such as Bradford or Tioga counties, a great well could produce 10 Mmcf/d or more. Whereas production in east central Pennsylvania might range between 1.5 and 4.0 Mmcf/d.

5.0 Mmcf/d is a good average number for Pennsylvania with the understanding that there is a wide variation between wells in actual flow rate. 

Incidentally, 5 Mmcf equals approximately 5,000 Mmbtu or exactly 5,000 Mcf . Here's a good calculator to use.

--Tom

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