2016-07-07_rexonic energy services presentation

The Ultrasound System Technology and Results

Ultrasound Technology

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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

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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

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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

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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

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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

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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

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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

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Same mesh after 20 minutes treatment with ultrasound


On Site Setup

Set up and operations in Texas


Case Studies

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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

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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

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Well 1 – Completion


Selected Cases

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Well 1 - Production

Note: Well still producing approximately + 20%; 5 months after stimulation Rexonic Energy Services | June 2016 | - strictly confidential

Selected Cases

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ONSHORE TEXAS / USA








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

Average oil production 2 months monitoring



Selected Cases

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Well 2 - Production


Selected Cases

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Offshore – Gulf of Mexico


Selected Cases

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OFFSHORE MEXICO


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


Casing OD at perforation depth [in] 5.5 Water [BWPD] Gas [MMCFPD]

207 5.1

291 4.0

560.0

795.0

0

200

400

600

800

1000

Average oil production 1.5 months monitoring



Selected Cases

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Well 3 - Completion


Selected Cases

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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

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ONSHORE TEXAS / USA

WELL ID Well 4 (Details Confidential) DATE OF STIMULATION 2016-03-01 HF - GENERATOR 5000 W









API grade 42



20.9 77.4

22.2 103.7

15.9

28.8

0

10

20

30

40




Selected Cases

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Well 4– Well Completion


Selected Cases

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Well 4- Production


Selected Cases

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ONSHORE TEXAS / USA

WELL ID Well 5 (Details Confidential) DATE OF STIMULATION 2016-04-07 HF - GENERATOR 5000 W









API grade 42



33.7 59.5

66.1 65.0

6.0

14.3

0

5

10

15

20




Selected Cases

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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 [email protected] 432-208-1220 Jared Hopper – Stimulation Engineer [email protected] 432-288-3786

2016-07-07_rexonic energy services presentation

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