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

Produced by Halliburton Communicationswww.halliburton.com

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 stimulation@halliburton.com.

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.