Comparing Two Wells, Mano A Mano -- From A Reader -- February 9, 2019

This is really some nice work by a reader. Much more than I have time for. Much, much appreciated.

The reader is comparing two CLR wells in the Rattlesnake Point oil field. One is a Bridger well; the other is a Mountain Gap well.

Note: the data in red is my data based on dividing oil produced by number of days of production. This was done quickly and not double-checked. Errors may have been made. I often make simple arithmetic errors.

Bridger wells are tracked here.

Mountain Gap wells are tracked here.

The Rattlesnake Point oil field is tracked here.

The reader notes:

Both wells drilled by the same company, same vintage, a mile apart. 

The reader comments:

Looking at the initial production rates it seems to me after 7-8 years of production the well with the most production would have the best geology?

My comment: it's hard to believe that the geology differs that much one mile apart. My first hunch if one well is appreciably different from another well and both wells are within a mile of each other, and assuming the operator is not "managing" the two wells differently, that it has more to do with a) percent of time the wellbore was in the "seam/target"; and, b) the quality of the completion.

The reader noted that the results of the re-frack done one year later were much better than the frack a year earlier. Again, experience? Or a better frack?

Another comment: don't get overly excited about the production disparity between the initial production (from the first frack) and that following the re-frack: this probably has more to do with the decline rate than anything else. It's better to compare well vs well. If that makes sense.

The reader brings up another point which I will get to in another post.