ThermatekSM Service
Thermatek™ rigid setting fluids are a new generation of
chemical treatments used to provide engineered
solutions for a wide range of problems encountered when
drilling or producing fractured, unconsolidated or watered
out formations. These fluids are the basis of ThermatekSM
service. This new service is also an ideal solution for
plugging or temporarily isolating specific zones.
Combined with Halliburton’s engineering capability and
specialized equipment, Thermatek service is part of a total
package that provides operators a step-change advancement
in achieving successful interventions. Following are the
primary applications for Thermatek service:
• Water and gas shutoff in deviated and horizontal wells.
• Gravel pack selective isolations.
• Annular casing plugs (including horizontal wells).
• Severe lost circulation control treatment.
Thermatek service can be implemented via work string,
coiled tubing or dump bailer, depending on the application
requirements.
Thermatek Fluid Sets Up at a Prescribed Temperature
Thermatek fluid is engineered to remain as a low viscosity
fluid during placement. It then sets rapidly at a given
formation temperature. The transition from fluid state to
solid state is almost immediate, resulting in essentially zero
gas migration or channeling (see figure 3). This “right angle
set” occurs because Thermatek fluid is an exothermic
material. When the material enters the near wellbore area it
starts to spread out into the formation matrix; however, the
exothermic reaction is exponentially accelerated due to
increased surface area and temperature transfer. This
triggers the setting process and the Thermatek material
“locks up” before penetrating into the formation.
Stimulation
Helps meet the challenges of severe lost circulation, near wellbore water shutoffs and plugging operations.
Time (HH:MM)
Tem
pera
ture
(˚C)
Temperature (˚C)
Pres
sure
(psi
)
Pressure (psi)
Cons
iste
ncy (
Bc)
Consistency (Bc)
0:00-18
3.8
25.6
47.4
69.2
91
12.8
134.6
156.4
178.2
200
0
2500
5000
7500
10000
12500
15000
17500
20000
22500
25000
0
10
20
30
40
50
60
70
80
90
100
0:05 0:10 0:15 0:20 0:25 0:30 0:35 0:40 0:45 0:50 0:55 1:00
Tem
pera
ture
(˚C)
Time (HH:MM)
TemperatureCompressive Strength
Chandler Engineering Data Acquisition System
Com
pres
sive
Stre
ngth
(psi
)
204
181.8
159.6
137.4
115.2
93
70.8
48.6
26.4
4.2
-180
1000
2000
3000
4000
5000
6000
7000
8000
9000
10000
0:00 4:00 8:00 12:00 16:00 20:00 24:00
Figure 2 - Typical compressive strength vs time curve. In this example, set
up has been delayed 4 hr. Buildup of compressive strength is extremely
fast, in this case, over 4000 psi in less than 3 hr.
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Figure 3 - Typical temperature vs viscosity curve. In this example, set up
has been delayed about 60 minutes. Note that when set up begins, it is
almost instantaneous.
Figure 1 –Thermatek material test cube with11,000 psi compressive
strength. The material is acid soluble and can be removed from the well-
bore when desired.
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HALLIBURTON
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Sales of Halliburton products and services will be in accord solely with the terms and conditionscontained in the contract between Halliburton andthe customer that is applicable to the sale.
H03829 5/05© 2005 HalliburtonAll Rights ReservedPrinted in U.S.A.
ThermatekSM Service – Proven, CostEffective and Efficient
Whether it is for water shutoff or a treatment to help
control lost circulation, Thermatek service integrates the full
capability of Halliburton’s experienced applications
engineering services with a full suite of wellbore simulation
software, mixing and placement equipment and field
service experts.
Halliburton’s processes help assure that every aspect of a
proposed intervention is reviewed and engineered to help
achieve success. In many cases, the savings in rig time or
intervention time more than cover the cost of the
Thermatek service.
For more information about how Thermatek service can help you meet the challenges of severe lost circulation, near wellbore water shutoffs and plugging operations, contact your
local Halliburton representative or email [email protected].
Thermatek Service Key Features
• Predictable and controllable right angle set.
• Zero shrinkage helps provide gas-tight seal.
• Zero static gel helps achieve zero gas migration.
• Rapid build of compressive strength up to 11,000 psi.
• Easy to remove by drilling, milling, or acid.
• 100% acid soluble with 99% regained permeability.
• Used safely in producing formations with virtually no
invasion damage.
• Tolerates up to 50% contamination.
• 4-5 micron median particle size.
• Easily mixed and pumped with conventional equipment
and techniques.
Case History
ThermatekSM service used to shut off all flowfrom a watered-out horizontal well section toenable reperforating into the migrated oil rim.
North Sea – Operator needed to seal a 4-in. x 7-in. casing annulus in
a horizontal well section located immediately above 3000 ft of 4-in.
sand screens in order to prevent preferential production from the
watered out horizontal. Halliburton designed an intervention for
coiled tubing deployment of a special formulation of Thermatek- ZI
(zonal isolation) material designed not to flow through the screens.
An inflatable bridge plug was set at a desired depth and holes
punched in the 4-in. tubing to allow a calculated volume of
Thermatek fluid to be squeezed between the bridge plug and a
cement retainer into the 4-in. x 7-in. annulus. Potential slumping
of the fluid in the horizontal was minimized through the use of
proprietary gel spacers ahead of and behind the Thermatek fluid
pill. Results: The entire treatment was mixed, placed and pressure
tested within a single 12 hr shift. The isolation was completely
successful with 1,000 psi held on the plug for 15 minutes to prove
100% isolation of the annulus. Ten months after the intervention
the well was still producing 2,000 bopd with minimal water cut.
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Set retrievable bridge plug with coiled tubing
Perforate casing above zone to be isolated
Set inflatable squeeze packer above new perforations
Pump Thermatek fluid between gel spacers
Displace Thermatek fluid to openhole annulus
Perforate casing above the isolated zone.
This product is protected by U.S. Patent No. 6,664,215, Iranian Patent No. 38003034 and Nigerian Patent No. RP 14,497, additional U.S. and international applications pending. The trademark THERMATEK is used pursuant to license.