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

3) the forecast annual gas injection showing the portion of make-up gas versus reinjected
gas;
4) the composition of the current gas-cap gas, and the average composition of the injected
gas on an annual basis;
5) the estimated liquid and sales gas recovery by the various depletion strategies compared
to primary depletion; and
6) economic evaluation used to determine the optimum depletion strategy.
The quantification of natural gas liquids carried in the gas cap is of primary importance to the
feasibility of the scheme.
2.1.4 ER Related Processes
2.1.4.1 Reporting Requirements
Progress reports for most ER schemes (waterfloods and immiscible gas floods) were
eliminated in ERCB IL 94-13: ERCB Progress Report Requirements—Conventional
Enhanced Recovery Schemes. Reporting is still required in the following situations for ER
schemes:
• performance presentations and annual data submissions for active miscible flood
schemes, in accordance with ERCB IL 96-2: Progress Report Requirements for Miscible
Flood Schemes,
• progress reports and/or performance presentations for gas cycling schemes,
• reporting required as a condition of an ERCB approval or letter, and
• any reporting required as follow-up to ERCB audit and surveillance processes, including
reserve estimates.
2.1.4.2 Audit, Surveillance, and Enforcement
The ERCB will audit all new ER schemes and selected scheme amendments about six months
after approval issuance. These audits will be conducted to
• confirm compliance with approval conditions,
• verify that the requirements of Directive 051 have been met,
• review scheme performance (actual versus predicted) to identify any issues, and
• validate data integrity.
If issues arise, the ERCB may request additional information or clarification from the
approval holder, take appropriate enforcement action and require corrective measures
necessary to protect the oil and gas resource, equity, safety, and the environment.
In addition to the six-month audit, the ERCB will conduct surveillance on all provincial ER
schemes on an ongoing basis. Random or targeted reviews may be conducted to ensure that
compliance is met and that performance is consistent with expectations. If compliance or
performance issues are identified, the ERCB will take appropriate enforcement action and
require the approval holder to implement corrective measures.
ERCB Directive 065: Resources Applications / Enhanced Recovery Scheme (October 2011) • 2-21