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The AAPG/Datapages Combined Publications Database
Houston Geological Society Bulletin
Abstract
Abstract: Future Hydrocarbon Potential of
Iran
Iran
By
Atlas Exploration and Production Company,
Dallas, Texas
Exploration Potential
The potential for finding new hydrocarbon reserves in
Iran
is
immense. Many large surface anticlines in the Zagros foldbelt
and elsewhere in
Iran
have yet to be tested. Announcements
of discoveries in
Iran
during recent years are essentially redrills
of known prospects or discoveries not economical prior to the
1979 revolution. The prospect inventories present in
Iran
in 1979 have not been tapped in over 20 years. Many structures
tested and plugged before the revolution would be economical
today utilizing modern technology. These abandoned structures
and missed pay opportunities offer a large inventory of low-risk
exploitation projects. Complex structures and difficult data
areas offer potential for undiscovered reserves using
modern 3D seismic acquisition techniques. The existing fields in
Iran
are structural traps that have often been tested by shallow
stratigraphic wells (Tertiary Asmari), providing significant deeper
pool exploration prospects. There are no stratigraphic traps
currently defined in
Iran
. Modern analytical structural and
stratigraphic techniques (sequence stratigraphy and balanced
structural sections) are not widely used in
Iran
. There is significant
potential in footwall subthrust-style traps (onshore) and
salt Bank traps (offshore).
The
petroleum
systems
in
Iran
have been known since before the
revolution. The potential for giant fields in
Iran
resulted in
state-of-the-art geological and geophysical work by most companies
in the search for discoveries before 1979. Recent
discoveries of multibillion barrel fields in
Iran
by the NIOC
(National Iranian Oil Company) have reenforced the future
potential for giant discoveries.
Petroleum
systems
composed of
multiple reservoirs (clastic and carbonate), sources and seals are
present in the Tertiary, Cretaceous, Jurassic and Paleozoic. Many
of these
petroleum
systems
are the same as in the Gulf States and
neighboring countries, yet the Lower Cretaceous, Jurassic
and Paleozoic
systems
have yet to be exploited.
Sanctions
U.S. based companies have been prohibited from doing business
with
Iran
by the same U.S. government that has recently sought a
means to increase world hydrocarbon production. The result is
the utilization of our U.S. strategic oil reserves to temporarily
control world oil prices. Meanwhile non-U.S. companies have
continued to pursue projects and ventures in
Iran
despite the
presence of sanctions. In the 2nd Buy Back round offered by
Iran
, 21 of 37 projects offered, contained significant equity previously
held by American companies. American companies are not
only prohibited from making attempts to pursue these equities,
but they are also losing their competitive edge given by proprietary
databases acquired before the 1979 revolution. The
sanctions limit many business opportunities, but travel to
Iran
,
exchange of public information, and the exchange and purchase
of some types of data are permitted. Providing detailed proposals
or interpretation of data is prohibited.
Economics
The current economic terms in
Iran
provide a major hurdle for
American companies accustomed to production-sharing
contracts. Many companies understand the effects of booked
Unnumbered Figure. Zagros Foldbelt.
End_Page 18---------------
reserves upon their stock price, but they are not accustomed to
the impact that a project awarded in
Iran
will have upon their
stock value. The Buy Back terms in
Iran
are essentially that of a
service agreement based upon a fixed rate of return and time
period, regardless of oil price and OPEC quotas. Development
projects in
Iran
offer low technical risk projects that have high
rates of return. Offshore projects may offer higher rates of
return due to higher development costs. While onshore fields in
Iran
may contain the greatest reserve potential, they may not
result in the best rates of returns under the Buy Back terms.
Reserve potential does not affect economics under the Buy Back
terms, as no reserves are booked by the foreign companies.
Economics in
Iran
are driven entirely by capital expenditure and
the rate of return of the development costs of the project.
Unnumbered Figure. Topographic image of
Iran
.
End_Page 19---------------
Unnumbered Figure. Structural trends and oil and gas fields.
End_of_Record - Last_Page 21---------------