Replies to This Discussion

Permalink Reply by Skip Peel - Mineral Consultant on May 14, 2018 at 6:24

Just that, a shack (often an RV or some type of portable temporary structure) with an attendant to monitor and control access to a private road leading to an O&G surface location.  I guess you could call them a guard but typically they are an unarmed civilian as opposed to a sworn officer or a rent-a-cop.

Permalink Reply by Hydrocarbonite on May 14, 2018 at 6:37

Ok thx, 

Permalink Reply by Rock Man on May 14, 2018 at 9:11

Building on Skip's comments, operators normally do this to control unwanted people traffic on location - especially sales people and individuals looking for work.

Plus interested individuals looking for well / test data

Permalink Reply by Bob Zimmerman on May 14, 2018 at 8:29

If it's big, fat tankers, it's oil. If it's smaller in diameter, slender tankers that look like huge canon barrels , it's water being hauled off. You want more of the first, less of the latter. 

The guard shack could be to help keep a tight hole, i.e. keep a lid on info about the well you don't want unauthorized persons to get ahold of. 

Permalink Reply by Rock Man on May 14, 2018 at 9:37

Some oil being trucked off this early in the flowback is a good thing to see, i.e. it means that they have exceeded storage capacity on site.

Early post frac flowback will be VERY high percentage water (frac fluid) with oil break through happening ?????. I am not familiar with how the AC Hz frac wells respond post frac as to when oil starts coming in and how oil cut progresses over time.

In looking at two extremes on this issue, the Lower Spraberry in the Permian may take over a month of 100% post frac water production before oil breaks through (and this is with 2000-3000 bbls per day volumes).

On the flip side, I have seen some Wolfcamp A wells start making oil day #3.

Eagle Ford tends to have oil break though within a week and then see oil cut percentage build to 40-50% in 30 to 60 days.

But in saying all this, there is no set "norm" for how a well will perform post frac.

Permalink Reply by Bob Zimmerman on May 14, 2018 at 13:32

In and around the Pitkin Field in the last boom, oil was present from day one, best I can recall. And were was tremendous water volumes right along with it. And gas, high pressure. Let me tell you, when that gas flame comes out of that pit and starts walking around, that separates the men from the boys right quick. The boys are in front on account of they're younger and faster, and the men are right behind them 'cause we're older and slower. But everybody is on the run from that hell. 

Permalink Reply by Rock Man on May 14, 2018 at 14:42

In reply to BZ's comments on Pitkin Field AC. the instantaneous O&G (plus water presence was due to the fact that this was a natural fracture based play - open fractures filled with "fluid" that would naturally flow once drilled into (and hydrostatic pressure released).

Difference now is pumping thousands of bbls of water and large volumes of proppant into the AC to create the matrix fracture system. Imagine this being like a "wave" of frac fluid pushing out from the lateral. As the well is shut in after frac, the proppant sets up in the newly created fractures and the "wave" of fluid needs to be removed in part before O&G starts getting into the "new" fractures from matrix and can start to be produced.

Note that you never recover all the frac fluid - this is one of those "hard to explain" phenomena that occurs in all unconventional plays. The frac fluid tends to become imbibed into the formation or "lost" in the system thru the intricate and complex fractures system that has been created. 

Permalink Reply by Joe Aldridge on May 14, 2018 at 14:45

Hey Bob, A lot of it depends on how much water they pumped in to the formation. If they only pumped enough water to place the sand in the formation then it should clear most of the water pretty quickly. If they pumped 9.5 million gal like EOG did then they will probably will never clear all of the water. Do any of the tankers look like acid carriers?  Are there any pumpers on site?

Permalink Reply by Rock Man on May 14, 2018 at 15:12

Stimulation was completed back on April 16th. Well has either been shut in or flowing back since that time.

Permalink Reply by David Crockett on May 15, 2018 at 4:23

Blackbrush well is Now classified as a 31. Shut in dry hole future utility

Permalink Reply by Bob Zimmerman on May 15, 2018 at 6:24

Joe,
I am not on-site and I don't recall specifically an acid tanker so cannot give a description or any of the equipment used to acidize. The companies used to have to perform an acid treatment (or several) when the drilling mud set up on account of the heat down there baking the water out of the mud and sealing off the laterals from the formation. It was not entirely effective.Then they went to under balanced drilling utilizing the brine present in the formation, which did better, but then the price dropped out of the bottom and the boom was over. Maybe now it's coming back.

There remains between Glenmora and Pitkin on the south side of the road a large metal shed some Houston outfit erected to manufacture drilling mud for the play, so somebody knew something chalky twenty years ago.

That shed now houses some haying equipment and whatever. But it stands dead on ready for round two of the Louisiana Austin Chalk, where just over the hill and thru the woods lies the Temple 22 #1 where those four guys died in an explosion and the well itself has had remarkable production over time.

Something is wrong with this thread, I had to back up to get this added to the board. Wasn't there a discussion of this problem awhile ago about having to move over and start a new thread due maxing out existing capacity?

Permalink Reply by Joe Aldridge on May 15, 2018 at 7:58

Bob, Thanks for the reply. You see that's what I've been saying. You don't need to do any fracking. There is no porosity or permeability in AC. You need to drill with under weighted mud, find natural fractures, acidize to open the fractures, Then sand pack the formation to keep it open. This esoteric fracking is a bunch of BS. I'm sorry I don't understand this stuff about a "Matrix". Is that like the Movie? That might work above the shelf or in Texas but not below the Shelf in LA. If you are drilling in the right place there is no reason to look for a matrix.

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