Replies to This Discussion

Permalink Reply by Rock Man on August 12, 2018 at 10:37

Agree that 3D will not help the reservoir, but will help greatly in landing zone efficiency and staying in the target. If you look at the PetroQuest presentation that shows the EOG lateral, you can see that it cross cut the target interval. It was too low in the first part of the lateral and too high in the last part. And at least in the last part, the lateral was right on top of an ash bed (which is not good as I pointed out earlier this week).

Despite the rapid decline in the EOG well, one also has to keep in mind that the EOG was drilled toe down. And that they have not appeared to have installed any artificial lift to help unload the lateral and wellbore to help production. With the well right now only flowing under its own reservoir energy, it has to fight any hydrostatic pressure that is sitting on the productive interval as any fluid (Oil and/or water) builds up in the lateral and vertical part of the hole.

I don't have the math formula in from of me, but imagine hydrostatic pressure / weight generated by 10,000' of fluid (for example). That will negatively impact ANY flow from the lateral perforations / stimulated section into the wellbore.

P.S. 3D will also help operator avoid faulting. Every fault not anticipated and crossed by a lateral is causing several hundred feet of the lateral to end up being "out of zone" as the operator tries to adjust once the fault in crossed.

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Permalink Reply by littleasy on August 12, 2018 at 9:43

It is my understanding that 3D seismic results in fewer dry holes by optimizing well locations.  This includes guidance for horizontal drilling projects.  The downside is cost, but the question is would it help locate “sweet spots” in a given region where they have limited or no 3D data???

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Permalink Reply by Rock Man on August 12, 2018 at 10:43

Good 3D data tied to well control / rock info can go a long way to evaluating reservoir quality in addition to the obvious improvement of lateral landing and targeting (and fault ID).

Considering the well costs we are looking at in this area, a 3D that costs $60,000 to $80,000 per square mile is a good investment for any serious operator.

It is a chicken or egg situation as to should you get the 3D first vs get some successful wells first. 

I am figuring that operators have purchased and are analyzing every bit of historical 2D and 3D data that is in the data libraries of such companies as Seitel, SEI and other firms. Getting that data is a lot cheaper than getting new data - plus it can be reprocessed to achieve some data improvement.

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Permalink Reply by littleasy on August 12, 2018 at 10:49

Thanks Rock Man, your presentation in Marksville made me comfortable offering my amateur geologist’s comment.  I’m glad you shared your expertise with the group.

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Permalink Reply by Rock Man on August 12, 2018 at 10:54

That was one of the objectives of the presentation, i.e. spread the G&G "word" to others so that they can better understand it and then relate it to others.

And you are very welcome - it was great meeting and talking to you and others in Marksville!

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Permalink Reply by William C. Morrison on August 15, 2018 at 4:34

Aside from 3D, what about re-evaluation of existing Seismic data. There is plenty of that around, some I am sure is very old and some is newer. I can recall the old days when dynamite was used to initial an area for seismic data collection. Later technology use what I would describe as "thumpers." I have seen that used in Texas on the Barnett Shale play. But surely, with modern day computers, old data can be re-evaluated at much less cost of 3D collection and evaluation. I would think there are some back rooms at the various E&P outfits full of data, not just seismic but previously drilled records, etc. I would appreciated reading about that kind of assessment.

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Permalink Reply by Rock Man on August 15, 2018 at 4:41

You are dead on target that old 2D and 3D data can be used. If the acquisition tapes are available, the data can be re-processed to extract more data / info and-or make the data easier to work with. Results of reprocessing will vary depending on the original acquisition parameters and the amount of energy pumped into the ground to get this data.

There are several seismic sales companies that have large libraries of older data that can be purchased by operators for a lot less than shooting new data. Seitel and SEI are two of these companies.

Go to www.Seitel.com and look at their data map to get an example of the amount of data for sale that is available in the Louisiana AC trend.

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Permalink Reply by William C. Morrison on August 15, 2018 at 5:07

Thanks. I did look at Seitel link but they have little data on the area I am interested in.  But they indeed have a impressive library of data.  I know there is data on the area as there are gas wells that produced until they "sanded" over.  No matter, somebody has it.  That is at least comforting.  That an the fact we do have a current lease although I do not think EOG is going to do much.

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Permalink Reply by John M Santamaria on August 15, 2018 at 4:55

Was there information presented about the current status of possibility of any more Austin chalks wells in avoyelles?

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Permalink Reply by Rock Man on August 15, 2018 at 4:59

Are you asking if my presentation addressed more Avoyelles Parish drilling? 

There is no way that anyone can predict that EOG or any other operator will do some more drilling in this Parish, but considering that the EOG is a "good show well" that has already made over a 100,000 BO from to toe down short lateral that appears to not be optimally drilled in the target interval does point to possibility of additional drilling.

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Permalink Reply by mudbug on August 15, 2018 at 6:19

Does anyone have any information as to who EOG has sold or is selling to?

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Permalink Reply by Rock Man on August 15, 2018 at 6:32

Nothing has posted from EOG and any possible buyer @ this - assuming it ever happens right now.

The word for the time being is "patience" - things move slowly in the oil field / especially in terms of A&D issues.

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