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

Requirements
Comments
i) stratigraphic interpretation of the
zone(s) of interest,
ii) interpretation of the fluid interfaces
present,
iii) completions and treatments to the
wellbore(s), with dates,
iv) cumulative production,
v) finished drilling date and kelly
bushing (KB) elevation, and
vi) the scale of the log readings, and
d) a tabulation of your interpreted net pay,
porosity, and water saturation for each
well in the pool, along with the cutoffs,
methodology, formulas, and constants
used.
2) Maximum bottomhole injection pressure and
maximum average reservoir pressure.
This information defines the upper limit to
the operating pressures of the scheme.
3) Complete tabulated pressure history of the
pool (date, well, type of test, stabilized
pressure), along with a P/Z versus
cumulative gas production plot if the pool is
a nonassociated gas pool, or material
balance calculations if storage is into a gas
cap in communication with an oil leg.
This history indicates pressure support from
the aquifer and how the reservoir may react
to storage.
4) Gas analysis of the native reservoir fluid and
the proposed injected gas stream(s).
This describes what the compositions of the
gases are before they become mixed.
5) Discussion of how the storage of gas will be
consistent with sound conservation
practices.
6) If at any time during storage, the average
reservoir pressure will exceed the initial
pool pressure (i.e., delta pressuring is being
applied for), then reservoir containment of
gas becomes a concern and the following are
required:
ERCB Directive 065: Resources Applications / Underground Gas Storage (October 2011) • 4-17