The Future is Real Time™

Last Revised: 130430

PERM SERVICES INC.

PERM SERVICES (USA) INC.

115 – 2nd Ave W, Ste. 206 Williston, ND 58801 USA

P +1.701.572.4002 T +1.855.995.6878

PERM SERVICES INC.

Unit 17, 47 Aero Drive NE Calgary, AB T2E 8Z9 CANADA

P +1.403.295.6878

SAGD Production Wells

Continuous Steam Circulation or Cyclic Steam Stimulation

SAGD Pressure &Distributed Temperature

Thermocouples can be pulled through coiled tubing and installed in the wellbore. Systems can also be suspended inside open hole/cased hole application.

Tubing

Coil tubing

Surface Casing

4mm Capillary Tube

Bubble tube heel and toesystems for pressure collection

Multi-point thermocouple bundle

SAGD - The Important Role of Downhole Distributed Temperature and Pressure InstrumentationDISTRIBUTED TEMPERATURE—The primary objective of steaming is to improve the viscosity of the bitumen so that artificial lift is feasible. Whether a Continuous or Cyclic Steam approach is used it is critical to measure the horizontal wellbore temperature profile at several points / distances to ensure drainage conditions are prime throughout the wellbore.

Typical downhole temperatures range from 235°C to 350°C. Three are three predominant sensor technologies for measuring distributed temperature:

Technology Pro’s Con’s

Fibre Optics • Best Data Accuracy.• Complete temperature

distribution profile.• Acoustic applications.

• Limited life span due to Hydrogen darkening.

• More expensive.

Thermocouple • The Best Long Term Durability.

• Cost Effective. Two measurements points per instrumentation line.

• Moderate accuracy.

Digital RTD • Good Accuracy. • Below average life span.• Four conductors required

for accuracy.

Perm Services specializes in designing, manufacturing, and installing thermocouple bundles and partners with other leading technology companies for Fibre Optic deployments. Many solutions are deployed with coiled tubing strings.

SAGD PRESSURE - Measuring wellbore pressure at temperatures between 235°C to 350°C is challenging yet very important for SAGD operations. Benefits include:

Measuring real time wellbore fluid levels. Automated pump control through VFD.

Measuring and abiding to ERCB regulations.

Preventing reservoir fracture.

There are several technologies for measuring downhole pressure in a SAGD environment.

Technology Price Temp Rating

Pro’s Con’s

Quartz Pressure Sensors

$$$$$ 225° Most accurate pressure technology. Expensive & lacking long term reliability.

Piezometers (Vibrating Wire)

$ 250° Cost effective. Measures both pressure and temperature.

Repeatability wains over time, especially with multiple pull and re-runs.

Bubble Tube (Nitrogen Injection)

$$ 500°C Best reliability. Modest price. Requires surface pressure tank maintenance program.

SAGD Production Wellhead with Bubble Tube Pressure Technology and Thermocouple for

Distributed Temperature

About Perm ServicesPerm Services is a North American based service company specializing in downhole instrumentation installation and support. The Perm Services technical team has installed over 450+ continuous downhole pressure systems in the past 5 years with all types of completions.

Perm Services has specialized installation equipment based in North Dakota and the Western Canadian Sedimentary Basin that both ensures personal safety and rapid deployment.

A system installed by Perm is:

• Reliable

• Cost Effective

• Innovative

• Proven