• Innovating Well
    Integrity Testing


Gas Migration Testing / Monitoring / Sampling

Using a patent pending test method along with state of the art equipment, DSA can effectively identify any signs of gas migration.

Surface Casing Testing / Monitoring / Sampling

With a variety of tools and test methods we are able to identify even the smallest and most intermittent indicators of surface casing vent flow.

VentMeter™ Services

A remote monitoring system that provides the most precise surface casing vent data possible in the industry.

Urban Well Testing / Monitoring / Sampling

Trusted expertise and in-depth testing and reporting for abandoned wells located in a variety of urban locations, and near/under surface developments.

Oil Sands Wellbore Integrity Testing

Over 20 years of experience servicing customers with well integrity and environmental issues unique to oilsands operations.

Wellbore Fluid Level Surveys

Reliable fluid shot test equipment offers accurate casing fluid level data.

why hire us?

industry experience

Trusted, reliable well integrity test data and consultation since 1988.
Over 30,000 individual well site assessments and tests
Wells Tested
Over 600,000 hrs of VentMeter™ Surface Casing Monitoring as of Sep 2015.
VM Monitoring
Trusted, reliable, well integrity test data and consultation since 1988.
27 Years in Business
Doull Site Assessments Ltd. has tracked a 0 lost time injury frequency.
Spotless Safety Record

Our Clients