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Undeveloped In Situ reserves, which constitute 28% of Suncor’s gross probable undeveloped reserves, and

approximately 61% of Suncor’s gross proved undeveloped relate to the Fort Hills mining area and Syncrude Aurora
reserves and 61% of Suncor’s gross probable undeveloped South mining area, which have regulatory approvals

reserves, will take several years to develop. Undeveloped In substantially in place and are well-delineated by core hole
Situ reserves have been assigned to reserves areas which drilling. First oil for the Fort Hills mining area is expected by

are not classified as developed producing. Where the fourth quarter of 2017. The co-owners of Syncrude do
supported by core hole wells, proved undeveloped reserves not expect that the Aurora South mining area will come

have been attributed to regions within 1.2 km from on-stream before 2024, when production from the Mildred
currently drilled or near-term planned production wells, Lake mining area is expected to be complete.

where Alberta Energy Regulator (AER) approval is pending, Undeveloped conventional (light and medium oil, natural
and in the case of Firebag, also within 2.4 km from
gas and NGLs) reserves constitute approximately 3% of
producing wells. Management uses integrated plans to Suncor’s gross proved undeveloped reserves and
forecast future development. These detailed plans align
approximately 11% of Suncor’s gross probable
current production, processing and pipeline capacities, undeveloped reserves. Undeveloped conventional reserves
capital spending commitments and future development for
the next ten years, and are reviewed and updated annually primarily relate to the company’s offshore assets at East
Coast Canada, mainly associated with Hebron which is
for internal and external factors affecting planned activity. currently under development (first oil expected in 2017),
The timing associated with developing undeveloped
and underdrilled or undrilled fault blocks related to
reserves is a function of the forecasts of the declining extension areas in Hibernia, White Rose and Terra Nova. In
production from existing In Situ wells. Suncor has
developing these reserves, Suncor considers existing facility
delineated In Situ reserves to a high degree of certainty capacity, capital allocation plans and remaining recoverable
through seismic data and core hole drilling, consistent with
resources availability. Accordingly, in some cases, it will take
COGE Handbook guidelines. In most cases, proved reserves longer than two years to develop all of the currently
have been drilled to a density of 16 wells per section,
assigned undeveloped conventional reserves. Suncor plans
which is in excess of the eight wells per section required to develop the majority of the conventional proved
for regulatory approval. In order to determine the
undeveloped reserves over the next five years and the
economic cutoffs of undeveloped reserves, geological majority of the conventional probable undeveloped reserves
information is tested against existing production analogues
over the next seven years.
that use established technology.

Undeveloped Mining reserves constitute approximately
36% of Suncor’s gross proved undeveloped reserves and

Properties with no Attributed Reserves
The following table is a summary of properties to which no reserves are attributed as at December 31, 2013. For lands in
which Suncor holds interests in different formations under the same surface area pursuant to separate leases, the area has

been counted for each lease.

Gross Net
Country Hectares
Hectares

Canada 4 478 244
3 316 732
.......................................................................................................................................................................................................................................................
Libya 2 950 978 1 339 489
.......................................................................................................................................................................................................................................................
U.S. – Alaska 1 106 288 368 726
.......................................................................................................................................................................................................................................................
Norway 648 876 240 847
.......................................................................................................................................................................................................................................................
Syria(1) 345 194 345 194
.......................................................................................................................................................................................................................................................
U.K. 127 141 45 454
.......................................................................................................................................................................................................................................................
Australia (overriding royalty interest only) 113 027 —

Total 9 769 748 5 656 442

(1) Does not include hectares for lands associated with reserves that were reclassified to contingent resources in 2012 as a result of the suspension
of operations.

SUNCOR ENERGY INC. ANNUAL INFORMATION FORM 2014 49