Directive 065: Resources Applications for Oil and Gas Reservoirs ...

Requirements
11) A tabulation of your interpreted net pay,
porosity, and water saturations for each well
in the pool, along with the cutoffs,
methodology, formulas, and constants used.
Comments
If you do not supply tabulated well data for
all wells in the pool, you must explain why
(e.g., the area of application is very small
relative to the entire pool).
Hydraulic Isolation
Disposal approvals specify the disposal zone and limit injection to that zone only. Migration
of disposal fluids to other zones is highly undesirable. Therefore, a suite of logs is required
for all injection wells in the province in order to confirm the absence of flow of injected fluid
behind the casing. For more details on the logging requirements, see ERCB Directive 051.
The ERCB will monitor to ensure that Directive 051 requirements have been met prior to the
commencement of injection.
Requirements
1) For disposal wells injecting hydrogen
sulphide (H 2 S) and Class I disposal, all
completion logging, testing requirements,
and associated discussion required by
Directive 051.
Comments
All H 2 S and Class I disposal wells must meet
the Directive 051 requirements prior to the
wells going on injection and prior to the
approval being issued. It is necessary to
ensure that the integrity of the wellbore will
prevent contamination of other zones and
protect all groundwaters. A preliminary
review of the application and a letter noting
approval in principle pending successful
Directive 051 completion and proven
injectivity may be issued if you desire to
proceed with the application in two stages.
2) In order to prove hydraulic isolation for
Class II-IV, provide the following:
a) the completion logs and associated
discussion required by Directive 051 for
all proposed disposal wells, or
b) a discussion of the plans for complying
with Directive 051, or
c) a request for waiver of the Directive 051
requirements, or
You should specify in the application
whether the proposed disposal wells are in
compliance with Directive 051 requirements.
If they are not, provide a discussion of the
plans to bring the wells into compliance with
Directive 051 or indicate that a waiver is
requested or has been approved. It is not
necessary for Directive 051 requirements to
be met in order for a disposal scheme
approval to be issued except when H 2 S or
Class I disposal is requested.
All disposal well completions must meet the
Directive 051 requirements prior to the wells
ERCB Directive 065: Resources Applications / Class I-IV Disposal (October 2011) • 4-5