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

The ERCB requires the geological extent and hydrocarbon pay thickness of a pool, any fluid
interfaces, and well control with statuses to assess how the proposed scheme relates to
optimum pool depletion, other existing schemes, and potential pool delineation and equity
issues.
For very large pools, the map should focus on the region in and surrounding the scheme area.
Well Log(s) Attachment (for new ER schemes and significant area amendments)
An interpreted and annotated log cross-section or representative well log(s) showing
1) stratigraphic interpretation of the zone(s) of interest,
2) interpretation of fluid interfaces (original and current, if applicable),
3) completion and treatments to the wellbore(s), with dates,
4) cumulative production,
5) finished drilling date and kelly bushing (KB) elevation, and
6) the scale of the log readings.
This cross-section may be presented in a number of ways—as one representative well log,
several well logs, or a detailed cross-section of the entire pool—depending on the complexity
and heterogeneity of the pool. The information on this cross-section assists in establishing the
vertical continuity within the pool and the overall quality of the pool.
Pressure Data and Interpretation Attachment (for new ER schemes and significant area
amendments)
Reservoir pressure data, including
1) measured or estimated reservoir pressures for the scheme area,
2) the source of the data, and
3) a discussion of how the pressure data relates to and supports the scheme operations.
The applicant must include all pressure data available for scheme wells. The data may be
presented in various formats, such as a pressure-time plot, an isochronal map, or a table
illustrating the pressures for the scheme wells. Pressure data should be corrected to the
ERCB-established pool datum.
All pressure data must be in metric units.
Reservoir pressure data are a key component to ensure the success and optimal operation of
ER schemes. Taking timely and representative reservoir pressure measurements assures that
the necessary information is available to help monitor and optimize scheme performance. All
new ER schemes will be added to the annual pressure survey schedule unless otherwise
stated.
Structure Map Attachment (requirement for new gas cycling schemes)
A structure map of the subject pool clearly identifying interpreted fluid interfaces (current
and original, if applicable), stratigraphic horizon, and contoured surface (porosity top or
formation top).
2-18 • ERCB Directive 065: Resources Applications / Enhanced Recovery Scheme (October 2011)