2016-07-07_Rexonic Energy Services Presentation

The Ultrasound System
Technology and Results

Ultrasound Technology
2
Our ultrasound technology cleans the formation in the nearest
vicinity of the well from wax, asphaltene and other particles
1. Paraffin, asphaltene, particles and
other damages are plugging pore
spaces. Oil wells are not producing at
their potential capacity
2. By application of ultrasound, the
cleaning mechanism of micro acoustic
streaming begins in the pore space
3. The ultrasound’s high power disrupts
the adhesive forces that hold the
particles in place. Consequently, these
particles get removed
4. Pore space and initial permeability are
restored, resulting in an increased oil
flow and cost-effective production
Rexonic Energy Services | June 2016 | - strictly confidential

Complete System Setup
Schematic system set-up

Stimulation Equipment
4
Simple delivery and setup for on- & offshore services
worldwide
Resonator in perforation zone
ELECTRIC POWER
GENERATOR
 3 x 400VAC (50/60 Hz)
 >18 kVA
 Partner technology
ULTRASONIC
GENERATOR
 PG20150 5kW
 PG20250 10kW
 Rexonic Ultrasonics AG
core technology
LOGGING CABLE ON TRUCK
 Up to 7000 m (≈ 21,000 feet)
 On spoiler unit / cable spool
 Partner technology
 RESONATOR & WELL
 TIT-44: d=44mm (1 3/4”)
 TIT-76: d=76mm (3”)
 Rexonic Ultrasonics AG core
technology
21,000ft
18,000ft
15,000ft
12,000ft
9,000ft
6,000ft
3,000ft
0ft
Oil well
PORTABLE UNITS FOR REMOTE DEPLOYMENT
 Units are small, efficient and portable
 A complete set can be transported by a pickup truck,
a helicopter or a standard container
INTEGRATION OF STANDARD EQUIPMENT
 Works in combination with standard logging cable,
crane and power generator
 Equipment provided by certified local oil service
companies
ONSHORE SCENARIO

Ultrasonic Power Supply
5
Technical Data
PG20150 PG20250
Max. Ultrasonic output 5‘000 W 10‘000 W
Output voltage 870 V 1‘250 V
Max. output current 8.0 A 12.0 A
Output frequency 20 kHz 20 kHz
Fuses 3 x 10 AT 3 x 16 AT
PG20150 PG20250
Weight 115.5 lbs 132.5 lbs
Dimension (LxWxH) 19x23.6x13.9 mm 19x23.6x13.9 mm
Electrical connection 3/PE, 400V AC ±10% 3/PE, 400V AC ±10%
Frequency 50/60 Hz 50/60 Hz
Ambient temperature max. 113 °F max. 113 °F
Max. relative air humidity 80 % at 86 °F 80 % at 86 °F
• PG20150
Installation Specifications
© Rexonic Ultrasonics AG | June 2016 | - strictly confidential

Resonator / Sonotrode TIT
6
Technical Data
TIT-20-44 TIT-20-76
Output frequency 20 kHz 20 kHz
Max. Ultrasonic power 600 VA 1‘000 VA
Max. voltage 250 V 350 V
Max. current 2.0 A 2.8 A
Max. temperature
continuous
212 °F 212 °F
Max. temperature pulse
mode
248 °F 248 °F
Max. pressure 300 bar 300 bar
Active area 3.7 ft2 7.1 ft2
Weight 18.3 lbs 35.3 lbs
Dimension 48.82 inch x ø1.73 inch 48.82 inch x ø2.99 inch

References
7
Ultrasound as technology with high
potential for the oil and gas industry
SPE-169770 Scale Removal with Ultrasonic Waves (University of Leoben)
 With ultrasonic treatment it may be possible to reduce or even substitute the chemical applications
SPE-31129 Ultrasonic Removal of Organic Deposits and Polymer Induced Formation Damage. (Los Alamos National
Laboratory, Schlumberger, University of Texas at Austin)
 It is shown that mechanical agitation provided by the acoustic waves effectively resuspends the paraffin and
restores the effective permeability of the core to oil to its undamaged condition in a relatively short period of time
 The depth of treatment is approximately 12-15 cm
 This suggests that an acoustic source with or without solvents may provide an effective method of removing
paraffin from the wellbore and the near wellbore region
 Ultrasonic cleaning appears to be a viable technique for treating paraffin problems, especially if combined with
solvent soaks
 Previously reported work indicated that ultrasonics is capable of significantly reducing damage induced by drilling
mud infiltration and in-situ fines migration. Similarly, positive cleaning results were obtained for paraffin and
polymer damage. Approximately 1.4 kJ of acoustic energy at 20 kHz removed all precipitated paraffin from the
first 6.35-cm core section and increased the permeability in the second 5.08-cm section by 100%

References
8
SPE-27388 Ultrasonic Removal of Near-Wellbore Damage Caused by Fines and Mud Solids (Los Alamos National Laboratory,
University of Texas at Austin)
 The results showed that permeability increased by a factor of three to seven after ultrasonic treatment for cores
that were damaged by mud solids and fines migration
 It is most likely that acoustic streaming is the dominant mechanism for cleaning both mud and fines damage,
although cavitation may contribute to the removal of near surface particles in the mud damage case
CSCanada Asphaltene Flocculation Inhibition with Ultrasonic Wave Radiation (Texas A&M University at Qatar)
 According to the results obtained, ultrasonic wave technology can be a potential method of flocculation inhibition
and can have extensive industrial application

References
9
SPE-88767 Near Wellbore Stimulation by Acoustic Waves, (Shell, Halliburton)
 A promising new technique to remove the near-wellbore damage is high-frequency acoustic stimulation
 Damage particles mobilized by the acoustic waves are removed from the reservoir interval by the production flow
 Acoustic stimulation is a novel technique to selectively clean-up wells and is enhanced by underbalanced
pressure conditions
 Acoustic treatments enhance the clean-up of filter cake significantly even in a laboratory model of a gravel pack
completion
SPE-107083 Feasibility Study of Ultrasound for Oil Well Stimulation on the Basis of Wave Properties Considerations (PDVSA)
 Penetration is approximately 2-3 ft.
 Suggesting a high potential of ultrasound for the following applications in well stimulation:
− Damage removing in the near of the wellbore caused by fines migration
as well as organic and inorganic precipitation
− Gravel pack and screens cleaning
− Perforations cleaning
 Research in Ultrasound, as mechanical stimulation , should continue because it is an attractive technique and it
can be used while the well is producing avoiding placement fluids and deferred production

Basic Ultrasonic
Components
10 © Rexonic Ultrasonics AG | June 2016 | - strictly confidential
External
power
supply
380 V
Ultrasonic
Power supply
Converter
PZT
(lead lanthan zirconate)
50/60 Hz
20 kHz
Electrical energy
Mechanical energy
Booster
Amplitude increase
Sonotrode
Resonator

Resonance Frequency

Cleaning Example

Cleaning Example
13
Same mesh after 20 minutes treatment with ultrasound

On Site Setup
Set up and operations in Texas

Case Studies
15
Country Company Location Year
Romania Petrom Onshore 2008, 2009
Mexico PEMEX Onshore 2009
Mexico PEMEX Offshore 2011, 2015
Venezuela PDVSA Offshore 2013
India ONGC Onshore 2013
USA, Texas Legacy, Encana, Apache Onshore 2015
Ultrasound technology applied at various locations

Selected Cases
16
ONSHORE TEXAS / USA
WELL ID
Well 1
(Details confidential)
DATE OF STIMULATION 2015-05-20 HF - GENERATOR 5000 W
PRODUCER Confidential TOTAL STIMULATED LENGTH [ft] 22 RESONATOR TIT-44
Year of completion 2001 [BOPD]
Total well depth [ft] 9420
Production methodology Sucker Rod Pump
EOR methodology Waterflood
Lithology at perforation depth Porous Limestone
Temperature at perforation depth [Deg C] 63.6
Hydrostatic pressure at perforation depth [psi] 1180
API grade 35
Well inclination at perforation depth [deg] 0 PRIOR AFTER
Casing OD at perforation depth [in] 5.5
Water [BWPD]
Gas [MCFPD]
65.0
9.0
66.2
12.3
33.0
41.8
0
20
40
60
80
100
Average oil production
2 months monitoring
Prior stimulation After stimulation Increase / Decrease

Selected Cases
17
Well 1 – Completion

Selected Cases
18
Well 1 - Production
Note: Well still producing approximately + 20%; 5 months after stimulation

Selected Cases
19
ONSHORE TEXAS / USA
WELL ID
Well 2
Temperature at perforation depth [Deg C] 68
API grade 41
Casing OD at perforation depth [in] 5
Water [BWPD]
Gas [MCFPD]
46.0
124.0
45.0
155.0
52.0
70.0
0
20
40
60
80
100
2 months monitoring

Selected Cases
20
Well 2 - Production

Selected Cases
21
Offshore – Gulf of Mexico

Selected Cases
22
OFFSHORE MEXICO
WELL ID
Well 3
PRODUCER Confidential
TOTAL STIMULATED LENGTH
[m]
20 RESONATOR TIT-44
Total well depth [m] 3329
Production methodology Gas Lift
Lithology at perforation depth Porous Dolomite
API grade 14.2
Water [BWPD]
Gas [MMCFPD]
207
5.1
291
4.0
560.0
795.0
0
200
400
600
800
1000
1.5 months monitoring

Selected Cases
23
Well 3 - Completion

Selected Cases
24
Well 3 - Production
Results
• Production increase approximately 42 % (average 560 bopd to max. 795 bopd) for
approximately 1.5 months
• Production increase approximately 10 days after end of stimulation due to gas lift
pressure adjustment

Selected Cases
25
ONSHORE TEXAS / USA
WELL ID
Well 4
(Details Confidential)
API grade 42
Water [BWPD]
Gas [MCFPD]
20.9
77.4
22.2
103.7
15.9
28.8
0
10
20
30
40

Selected Cases
26
Well 4– Well Completion

Selected Cases
27
Well 4- Production

Selected Cases
28
ONSHORE TEXAS / USA
WELL ID
Well 5
(Details Confidential)
API grade 42
Water [BWPD]
Gas [MCFPD]
33.7
59.5
66.1
65.0
6.0
14.3
0
5
10
15
20

Selected Cases
29
Well 5 - Production

The rexonics™ technology is the world’s first environmentally-
friendly, high-power ultrasound technology for commercial oil well
stimulation that has been proven to increase oil production
significantly both onshore and offshore.
The proprietary, patented technology is highly efficient in cleaning
the production well bore from typical oil production inhibitors such
as wax, paraffin and salt deposits, thereby significantly increasing
the flow of oil into the well bore. The technology does not use any
chemicals and allows the well bores to continue oil production
during the cleaning process.
Rexonic Ultrasonics AG operates on a service business model
providing production well bore cleaning services to national oil
companies, oil majors and other oil production companies.
Rexonic Energy Services
190 South East Loop 338
Odessa, Texas 79766
Ridge Tullos – Area Manager
ridgetullos@rexonicenergyservices.com
432-208-1220
Jared Hopper – Stimulation Engineer
jaredhopper@rexonicenergyservices.com
432-288-3786

2016-07-07_Rexonic Energy Services Presentation

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