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Marathon Frac Magic - Gonzales County
A few weeks ago I discovered information about the large frac's that EOG was performing of some of their better wells. I have recently found that Marathon has been testing similar massive frac jobs on some wells in Gonzales County. The recent monster well report on their Burrows No. 2 is a perfect example as compared to the Burrows No. 1 drilled earlier with a smaller frac. I think the oil componet of the No. 2 is in the 4,000 bopd range so more that double the production of the No. 1
Burrow # 1 - 1569 bopd, 7137' lat, 3.8 MM lb prop (? stages)
Burrow # 2 - 6275 boe/d, 7198' lat, 8.4 MM lb prop (27 stages).
The implications of this are huge assuming the decline curve will follow the traditional model. This would mean that the larger frac is creating double the EUR of the smaller frac. The ROI on wells the bigger fracs will be huge, not the mention that the royalty owner will be doubling their take over the life of the well. It may also mean that some of the marginal areas have now become profitable. However this approach hasn't to my knowledge been tested in the updip areas as yet. The service companies and sand haulers should be jumping up and down for joy with all the additional business it will create for them. I can only guess at what the recovery factor will become with this method, perhaps going from the current 6% to 12%? I wonder how long it will take other operators to get on the bandwagon. This could be the equivalent of finding a second EF formation! I wonder if this is something they have learned from the Baken or some other shale formation?
I hope that some of the experts will comment on this.
Views: 420
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Comment by Steve N on November 13, 2012 at 8:06pm -
Very interesting. Thanks for sharing the info. I think that as the fracing industry infrastructure in South Texas(field offices and yards, rail terminals, etc.) becomes more developed we will see frac costs dropping across the Eagle Ford Shale, especially with more competition coming online. Also, resin coated proppant looks very promising due to its low crush properties where higher pressures are encountered.
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Comment by Steve N on December 7, 2012 at 5:55pm
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Gary, have you heard anything about EOG trying larger bits (larger borehole) in Gonzales?
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Comment by Gary Ainsworth on December 7, 2012 at 7:42pm -
Steve - I am not aware of any changes in drill bit size or casing, but honestly I haven't been looking. I will see what I can find out. I have noticed that they are bumping upf the casing size of the laterals on their pearsall test wells up to 51/2" just as they were with the EF wells up to now as opposed to the 4 1/2 " that they started with.
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