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Report
Universal Oil & Gas, LLC Bothwell Syncline Federal 1-28H
Natrona Co. Wyoming
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API: 49-025-239210000
Spud Date: 09/12/14
Drilling Completed: 10/02/14
Location: Sec. 28 T38N R78W 1457’ FSL & 1964’ FWL
Surface Coordinates: Lat. 43.231544º, Long. -106.223531º
Bottom Hole Location: 85.44’ N & 2106.54’ W of surface
location or approximately 1542’ FSL & 143’ FEL SE/NE
• Ground Elevation: 5541’
• Kelly Bushing Elevation: 5556’
• Logged Interval: ~700’-7457’ TVD (Niobrara “C”)
True Drilling Rig #26
Universal Oil & Gas, LLC Bothwell Syncline Federal 1-28H
Natrona Co. Wyoming
• Highly fractured and faulted syncline to the south west of
the Teapot Dome Anticline. Seismic analysis revealed
numerous zones of possible hydrocarbon traps targeted
in the lateral drilling operations.
Surface Location/Lateral
Fracture Zones Of Interest
Surface Location/Lateral
Universal Oil & Gas, LLC Bothwell Syncline Federal 1-28H
Natrona Co. Wyoming
Surface Location
Start of Tangent/Back Azimuth
• Vertical/Pilot & Tangent Operations: The Bothwell 1-28H Was
planned to have a back azimuth deviated pilot hole (10˚ per
100’ deviated to the East of surface) drilled prior to the
lateral operations.
• The back azimuth portion was planned to keep the
designated lateral at ~1500’ Vertical Section, within Sec. 28.
Later in the drilling operation it was brought to the attention
of Seidel Geologic TM to hold lease obligations the proposed
bottom hole location be located in section 29.
End of Tangent/Back Azimuth
TD of Vertical/Pilot
As Planned
Universal Oil & Gas, LLC Bothwell Syncline Federal 1-28H
Pilot & Tangent Operations
• The Bothwell 1-28H Pilot was planned to TD 100’ into the
Niobrara Formation, 7” casing was set to a total depth of
4857.68’ TVD.
Surface Location
Start of Tangent/Back Azimuth
End of Tangent/Back Azimuth
TD of Vertical/Pilot
• Due to faulting in the Pilot Hole the depth of Niobrara
Formation was adjusted based off samples, as well as real
time gamma ray readings. This faulting deepened the
prognosis depth of the Niobrara by ~400’ TVD.
Universal Oil & Gas, LLC Bothwell Syncline Federal 1-28H
Pilot Operations Cont.
• Re-entry of the Pilot hole was conducted on 09/22/14 in
order to drill +100’ into the Carlisle formation to obtain
electronic logs through the Niobrara.
Sample 4875’ MD
• Upon re-entry, a mechanical failure (collapse) of the 7” casing
was encountered at ~4726’ TVD. The sample cuttings being
returned to the surface were of soft, uncured cement, and
stainless steel shavings originating from the casing.
Sample 4875’ MD
Uncured Cement
Casing Cuttings
• Pressure testing of the casing was conducted and the casing
passed the integrity at 1500 psi.
• Subsequently the decision was made to attempt to mill
through the casing to complete the pilot hole and run
electronic logs. This attempt to mill failed on 09/22/14.
Universal Oil & Gas, LLC Bothwell Syncline Federal 1-28H
Curve Operations
• On 9/23/2014 a whipstock was set at 4241’ TVD, a window
was milled in the 7” casing to kick off for the curve portion of
the well.
Milling/Control Drilling Casing
TD of Pilot Hole 4875’ TVD
• Milling was completed on 09/25/14 and the window was
drilled ~6’ into the formation. Late on 09/25/14 and into
09/26/14 the curve was time and control drilled from 4260’4356’ MD with a Hughes Tri-Cone bit in order to gain
sufficient distance from the Pilot hole.
• After Tripping out of the hole on 09/26/14 to change to the
curve BHA the curve was kicked off on 09/27/14 at 4356’
MD/~3320’ TVD. The curve was landed at a total depth of
6028’ MD/5317’ TVD and an inclination of 88.07º, on
09/30/14.
Universal Oil & Gas, LLC Bothwell Syncline Federal 1-28H
Curve Operations Cont.
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During drilling of the curve portion of the Bothwell 1-28H numerous small TVD changes or possible faulting/fracturing was
encountered starting at ~4861’MD/4782’TVD. This faulting deepened the landing depth of the curve to ~5315’ TVD, causing the
directional team to “rotate” tangents into the curve in order to bring the well bore to the specified depth.
4985’ MD Survey
Wellbore
5206’ MD Survey
Wellbore
Faulted intervals seen in curve
Target Top
Faulted intervals seen in curve
Target Top
5554’ MD Survey
5839’ MD Survey
Faulted intervals seen in curve
Wellbore
Target Top
Faulted intervals seen in curve
Wellbore
Target Top
Universal Oil & Gas, LLC Bothwell Syncline Federal 1-28H
Lateral Operations
• The lateral was started directly after landing the curve on
09/30/14.
• The well was prognosed and planned to have ~89º down dip
to the well bore in order to follow the target formation of the
Niobrara “C”.
Survey Nodes
Niobrara “C”
Wellbore
Target Top
Universal Oil & Gas, LLC Bothwell Syncline Federal 1-28H
Lateral Operations Cont.
The lateral was started directly after landing
the curve on 09/30/14.
Lost Circulation Zone
Up-dip Feature
During the drilling of the lateral numerous
structural changes were seen in the
targeted formation. The target interval
rolled from a ~89˚ down dip to ~92˚ up dip
then faulted down as it was determined we
had drilled into the foot wall or dropped
block of a fault. During the final portion of
the lateral the Bothwell 1-28H took
significant volume of drilling fluid losses
(+2000BBLS) to the formation due to a
fractured interval that was encountered.
This fracture interval at the end of the
lateral also mechanically stuck the pipe
most likely due to a collapse that packed of
the BHA and made it irretrievable.
Universal Oil & Gas, LLC Bothwell Syncline Federal 1-28H
Lateral Operations Cont.
• Tight Sands seen in the center part of the target interval had little to no
porosity. These sands were extremely well cemented, often contained higher
amounts of Bentonite and were associated with lower gas and slightly slower
rates of penetration. Trace amounts of oil staining were visible but bound
within the matrix of the rock they would not be able to be produced without
fracking.
Slower Drilling
Bentonite Zone
Bentonite Zone
No Porosity/No Gas
Universal Oil & Gas, LLC Bothwell Syncline Federal 1-28H
Lateral Operations Cont.
• Calcareous Shale in the upper part of the target zone were more porous and
prone to having better gas shows than the sand directly below. The shale
interval drilled faster on average and displayed roughly double the amount of
liberated gas while drilling. The end of the lateral however showed the shale to
be a more unstable drilling medium and prone to collapse when extreme
structural anomalies are encountered. This caused a massive loss of drilling
fluids +2000 BBLS and a stuck BHA, which was non-retrievable.
Lost Circulation/Stuck BHA
Porosity/More Gas
Universal Oil & Gas, LLC Bothwell Syncline Federal 1-28H
Lateral Operations Cont.
Shale/Gas Increases
Tight Sand/Less Gas
Shale/Gas Increases
Lost Circulation Zone
Universal Oil & Gas, LLC Bothwell Syncline Federal 1-28H
Lateral Operations Cont.
• The lateral finished drilling on 10/02/14, with the entry into the fracture zone seen at~1800’ vertical
section. The BHA drilled 300’ of vertical section into this fracture zone before sustaining a massive
fluid loss and eventually becoming stuck. Once stuck due to insurance purposes on the
MWD/Directional tools the decision was made to “Jar”, mechanically free, the lost tools.
• The jarring was done from 10/03-10/06/14 and was unsuccessful. The decision was made at ~0700
MST on 10/06/14 to plug and abandon the Bothwell 1-28H.
Projection to bit: 7457’MD, 86.66º INC, 271.03º AZI, 5335.35’TVD, 2106.54’VS
Bottom hole location: 85.44’ N & 2106.54’ W of Surface / 1542’ FSL & 143’ FEL SE/NE Sec. 29 T38N R78W
Kick Off Point
Total Depth 7457’ MD
Fractured Zone/TD
Kick Off Point
Total Depth 7457’ MD
Hydrocarbon Shows
Niobrara A
4853’-5056’ TVD
Summary
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None to good fluorescence
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Instant-slow blooming, diffusing to
streaming cuts beginning at 5080’ MD 92’
into the Niobrara A
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Trace light brown oil staining observed
beginning at 5080’ MD
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Fluorescence varied from bright whiteblue-dull yellow gold
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Gas shows muted due to drilling on air to
prevent lost circulation ~peak connection
gas 73 total gas units
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Mud weight consistent at 9.0 lbs/gal
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No visible free oil observed in reserve pit,
shakers or in samples
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Trace intergranular porosity observed
Hydrocarbon Shows
Niobrara B
5056’-5195’ TVD
Summary
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Fair to good fluorescence
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Instant-slow blooming, diffusing to
streaming cuts
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Trace to common light brown spotty oil
staining observed throughout Niobrara B
member
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Fluorescence varied from common bright
white-blue to trace dull yellow gold
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Gas shows associated with connection
gases. Peak connection gas 69 total gas
units
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Mud weight ranged from 9.0 to 9.1
lbs/gal
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No visible free oil observed in reserve pit,
shakers or in samples
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Trace intergranular porosity observed
Hydrocarbon Shows
Niobrara C
5195-5355’ TVD
Summary
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Shows increased in Niobrara C member
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Poor to good fluorescence
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Instant-slow blooming, diffusing to
streaming cuts
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Trace to common light brown spotty oil
staining observed through Niobrara C above
middle of lateral target zone
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Fluorescence varied from common bright
white-blue to trace dull yellow gold
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Gas shows associated with connection gas
and possible fracture porosity. Peak gas 91
total gas units at 5483’ MD
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Mud weight ranged from 9.0 to 9.6 lbs/gal
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Trace visible free oil observed in reserve pit
and shakers
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Trace intergranular porosity observed
w/trace fracture porosity
Hydrocarbon Shows
Niobrara C Lateral
5933-7457’ MD
Summary
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Shows dependent on lithology
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Poor to good fluorescence
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Instant-slow blooming, diffusing to streaming
cuts
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Trace to common light brown spotty oil staining
observed through Niobrara C above middle of
lateral target zone
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No shows in siltstone facies of target zone
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Fluorescence varied from common bright
white-blue to trace dull yellow gold
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Gas shows associated with connection gas and
possible fracture porosity. Peak trip gas 194
total gas units at 7370’ MD
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Mud weight ranged from 9.0 to 9.6 lbs/gal
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Trace visible free oil observed in reserve pit and
shakers
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Trace intergranular porosity observed w/trace
fracture porosity
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357 total gas units observed upon circulating 27
hrs post TD
Hydrocarbon Potential Summary
• Most productive zones are Niobrara B & C members
• Further data gathering and evaluation required to determine hydrocarbon
potential
• Fracture zones severely under-pressured.
• Fracture zones highly unstable when drilling laterally.
• No observable fluid recovered from fracture intervals due to lost circulation
• Gas shows muted due to higher mud weights and drilling on air
• Oil shows indicated moderate volumes of matrix bound fluid
• Overall Niobrara B & C displayed consistent fair to good cut fluorescence
Universal Oil & Gas, LLC Bothwell Syncline Federal 1-28H
Recommendations
Vertical Drilling
• Drill vertically into one of the fractured
intervals seen on seismic. Then continue on
to the Dakota or Morrison Formations below
to asses their potential.
• Electronically log the intervals of interest and
make adjustments accordingly to target the
most viable interest.
• Drill on air to minimize the amount of
hydrocarbon migration due to drilling fluid
over pressure.
• Core the intervals of interest for potential total
organic carbon readings.
• Complete the well with perforated casing and
determine recoverable hydrocarbons.
Lateral Drilling
• Target the best zone observed while
evaluating the vertical well drilled into zones
of interest.
• Switch to a unconventional approach and
target tight oil shale that will need to be
hydraulically fracked to complete.
• Drill parallel within the frack radius to
fractured zones due to hole instability and
fluid losses.
• Using knowledge gained from electric logs and
or coring to target the most organically rich
zones and maintain wellbore placement
within this interval.

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