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Visualizing Marcellus (PA) oil & gas production (through September)

Marcellus (PA) – update through September 2018

This article contains interactive dashboards also available in the original blog post


This interactive presentation contains the latest gas (and a little oil) production data, from all 8,512 horizontal wells in Pennsylvania that started producing since 2010, through September.

Gas production from horizontal wells came in higher again in September, at 17.4 Bcf/d. Output has grown by about 10% in the 4 preceding months, driven mostly by an increase in well completions; In both August and September, 107 wells started production, the highest since the end of 2014.

This increase in completion activity didn’t have a negative effect so far on well productivity. In the ‘Well quality’ tab you’ll find the production profiles for all these wells, averaged by the year in which they started. Group the wells by the quarter in which they started (using the ‘Show wells by selection’), and you’ll see that the best initial performance came from the wells that started in Q3 this year, at over 13 MMcf/d.

Of the 5 leading operators, Cabot stood out as it increased gas production by 18% in just 2 months (see the final tab).

The ‘Advanced Insights’ presentation is displayed below:

This “Ultimate Return” overview shows the relationship between gas production rates, and cumulative gas production, averaged for all horizontal wells that started producing in a certain quarter.

Well design has changed significantly over the years; in 2012 about 4 million pounds of proppant was used per completion, on average, while this has recently increased to over 18 million pounds. The plot clearly shows how this has had a positive impact on well productivity.

Early next week I will have a new update on the Niobrara.

Happy Thanksgiving!


The original post (which includes a brief manual) can be found here:

Production data is subject to revisions. For this presentation, I used data gathered from the following sources:

  • Pennsylvania Department of Environmental Protection
Enno Peters's picture

Thank Enno for the Post!

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wind smith's picture
wind smith on November 22, 2018

Not good news to me.

Enno Peters's picture
Enno Peters on November 23, 2018

Sorry to hear that!

Bob Meinetz's picture
Bob Meinetz on November 30, 2018

To me neither, wind. Personally, I don't consider my personal enrichment worth sacrificing the environment of our descendants. But evidently some do, theirs.

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