SWN is drilling two wells in T10 R9 S6 and S7. The well information on SONRIS shows they started drilling in Dec 2022 but stopped in February of 2023. I don't know how to read the well information reported. Does it look like they reached target depth? Can someone look and see if the drilling had problems. If these wells are good, then i would think it would improve the interest/value in the nearby sections to the South. At least when I talk to the Tellurian landman he says the area is not proven and therefore lease offers are low. Thanks in advance for any feedback. Serial numbers are 253969 and 253968.
The Downs 6&7 -10-9 HC #1 drilled and set surface casing then the rig was moved to the Downs 6&7 HC #2. The #2 had problems with the borehole, a lot of reaming and washing to keep the borehole open and then a lost circulation event. Lost circulation is when the mud in the wellbore encounters a void in the formation and the mud goes into the void instead of remaining in the wellbore. That's kind of a simplified explanation but there isn't much more to be found in the database. There is no correspondence in the document portion of the database to provide further detail. It appears that there are formation issues in Section 31 - 11N-9W where the well pad is located. Maybe SWN could drill from the south, toe up in the future. There isn't much known about the township as there have been few wells drilled in 10N-9W.
Did the #1 well drill ok and just #2 had problems? I wasn't sure if they drilled the horizontal on #1 or just the vertical?
The #1 well only drilled to something over 2000' and set surface casing. The rig did not reenter #1 after the problems with #2. That may be because of the formation issues experienced in the #2 wellbore.
Decided to look at this after reading the initial posts. I have a theory as to what happened here.
See the attached PDF - shows a close up of this specific area. The two SWN wells / permits in question indicated (orange box).
I don't keep up on M&A in this are but looking like SWN acquired laterals that had been drilled earlier by Indigo and EnCana (Ovintiv). Also note the two EnCana / Ovintiv 2011 dry hole laterals that were drilled and plugged.
SWN doing pad drilling here, i.e., two wells on same surface pad. Drill the surface hole on #1 and then skid the rig to drill surface hole on #2. Then drill the intermediate hole on both wells before drilling the laterals on both wells.
Things went smoothly here as SWN drilled and cased the surface holes to about 2000'.
On reading the details in SONRIS, during the drilling of the intermediate hole on the #002 well, all heck broke lose.
This is all happening well above the kickoff part of the hole before getting to the 13,700' TVD of the planned lateral.
My thoughts here are the SWN had a drilling plan that was flawed and led to a lot of problems as to controlling the well and drilling a clean, efficient wellbore. The SONRIS notes are a litany of drilling problems.
Essentially - back to the drawing board.
I can foresee them coming back to this pad and going into the #001 well to resume drilling intermediate and lateral hole there.
The #002 well is dead and will never be re-entered.
These two laterals were permitted 1100' apart.
Drilling these deep laterals is not easy - and subsurface issues change quickly and can lead to unexpected drilling problems (like hole collapsing, lost circulation, unexpected gas zones, etc.).
Of course, this is always a possibility of human error on location that ended up spiraling things out of control.
Just my opinion based on looking this over.
Might there be formation anomalies in this general area due to displacement by Natchitoches Island? XTO drilled a HA well in this area and reported that the Haynesville was faulted out and not encountered.
That is always a possibility as one gets deeper in this area.
However, the notes in SONRIS for the SWN well seems to point to wellbore integrity issues being the root cause of their problems. And this was all occurring over 3000' above the permitted TVD depth.
Even if some deep seating faulting rooted it way shallow into the section, it is improbable that it would be the cause of what was noted in SONRIS.
The one exception may be a fault creating a lost circulation zone when it is drilled across - but that would easier be handled by LCM and other standard operations.
I have had a fascination with Natchitoches Island since I worked to put together a block of mineral rights to the immediate south of the ECA Messenger well (King Hill Field) in the early days of the play. There is little data and the image that I posted is the only map I've found that shows the location. I drive over the top of the Island every time I drive I-49 to Natchitoches and points south.
My main questions relate to the geological timing. Did the basin fill up around the island? Or, was the Island a later up thrust feature. If the former, I would expect little disturbance to the stratigraphic sequence surrounding the Island. If the latter, I would expect significant disruption and faulting.
The old timers who were most familiar with the island and it's impact on the stratigraphic column in the immediate area have all passed on. I feel sure it was a topic of interest in their day.
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