Transcript Centura Oil Inc.

Centura Oil Inc.
THE CENJET 90
A New Environmentally Cost Friendly
Well Completion and Production
Enhancement Technology for Today
Cenjet 90
A Better Way
-Completion
-Production Enhancement
Conventional Fraccing
A SMALL FOOTPRINT
The equipment profile is compact
and flexible to facilitate routine
site work
The waterjet, operating at 55,000
psi accelerates 4 gallons of water
and 1 pound of garnet per minute
through a 0.45 inch nozzle at
mach 3
The unit pictured has successfully
completed well services over
3,400 feet deep
THE CUTTING EDGE
The cutting head is coupled to
steel tubing and deployed via the
well casing
The cutting head, is brought up to
pressure at precise depths to
perforate both the casing and
formation
These slotted perforations can
eliminate near well bore damage
caused by prior work and expand
the well’s area of influence
Residual Cuttings from Typical
Coal Bed Enhancement
The effluent being discharged into
the mud pit consists of coal cuttings,
garnet and water and is discharged
at a rate of 4 gallons per minute.
Success Story
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SJ 30-6 #463S
200
180
300
Comments:
After the rig, the compressor was changed.
Compressor issues continuous due to weather
accessibility
250
160
 Operational success San Juan 30-6 Unit
#463S (11/16 – 12/7 Rig Repair)
HPWJCT
140
200
100
150
80
100
60
40
50
20
0
Sep-2004
0
Apr-2005
Oct-2005
May-2006
Nov-2006
Jun-2007
Date
Production
Casing Pressure
Jan-2008
Pressure (psi)
Rate (mscfd)
120
 Thick pay ~80’, good returns, surged
naturally
 Flow rate improves from 40 to
194MCF/D
Well Completion to Present
Well Completion to Present
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Analysis
The inserts in this brochure contain some very pertinent information. Referring to the two glossy well data
graphs titled Customer provided data sheet -SJ 30-6 #463S and #450S , please note the red line
representing production using the scale on the left side of the graph.
Cenjet 90’s “High Pressure Water Jet Cutting Technology” is abbreviated HPWJCT. This denotes when the
well was reworked on the timeline at the bottom of the page.
The blue line indicates casing pressure as measured inside the well using the scale on the right side of the
graph.
The black line is the reservoir pressure in the coal formation also using the scale on the right.
Results
1. The production curve shows a steep decline from the wells initial completion in 2004 and an impressive
increase after HPWCT.
2. This increase in production occurs as the reservoir pressure continues to rapidly decline. This is a
significant fact; normally one would expect production to be negatively impacted by a drop in formation
pressure.
3. The casing pressure is noteworthy as well; the inverse correlation between production and casing
pressure can usually be explained by wellhead issues. For example, if a compressor or a water pump
malfunctions, production declines and the well builds up casing pressure, this is evident on the graph.
However, after HPWCT, the wells exhibit both an increase in casing pressure and production.
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The two inserts titled SJ 30-6 #450S and SJ 30-6 #463S illustrate the wells performance from completion to
present. The results are very impressive considering the depleted state of the reservoir and its continuing
decline.
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Conclusion
The Cenjet 90 stimulation increases gas production and the wells have sustained this up kick for over two
years to date. This establishes new reserves which increases both the life and value of the well. This
technology has proven to be beneficial in rehabilitating underperforming wells. Therefore, the process
should have similar results when used for initial completion.