Regulatory Intelligence
What makes a frac well dual-barrier instead of single-barrier?
Category:
Hydraulic Fracturing
Research Basis
Archive Period
2012-2016
Records Reviewed
9
Primary Topics
Directive 083; dual barrier; single barrier; annulus monitoring; well integrity
Current Reference
AER Directive 083; IRP 24; AER Directive 009; AER Directive 010
Common Question
What makes a frac well dual-barrier instead of single-barrier?
Archive Findings
The FAQ says a dual-barrier system has a monitorable annular area from surface to the base of the first porosity interval above the fractured formation.
Surface casing is not counted as part of the D083 barrier system. If that monitorable annulus is absent, the well is single-barrier.
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Engineering Insight
Classify the barrier system before finalizing the frac basis. Do not call a design dual-barrier only because intermediate casing exists.
Current Guidance
Current Directive 083 requires wells to be designed, constructed, and operated to maintain integrity during hydraulic fracturing. Current casing and cementing requirements should also be checked under Directives 009 and 010.
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