124 PETROLEUM TECHNOLOGY, ECONOMICS, AND POLITICS
prospecting and exploration work in areas known to contain other
reserve bearing fields.
Category Dl resources are calculated based on the results the
region's geological, geophysical and geochemical research and
by analogy with explored fields within the region being evaluated. Category Dl resources are reserves in lithological and stratigraphic series that are evaluated within the boundaries of large
regional structures confirmed to contain commercial reserves of
oil and natural gas.
Category D2 resources are calculated using assumed parameters on the basis of general geological concepts and by analogy
with other, better studied regions with explored oil and natural
gas fields. Category D2 resources are reserves in lithological and
stratigraphie series that are evaluated within the boundaries of
large regional structures not yet confirmed to contain commercial
reserves of oil and natural gas. The prospects for these series that
prove to be oil- and gas-bearing are evaluated based on geological,
geophysical, and geochemical research.
Furthermore, the Subsoil Resources Law provides that a license
holder may request an extension of an existing license where
extractable reserves remain upon the expiration of the primary
term of the license, provided that the license holder is in material
compliance with the license.
However, in accordance with the Law on Subsoil, mineral
reserves in Russia are subject to mandatory state examination,
and subsoil users cannot be granted a production license with
respect to a field that was not examined. The state examination of
reserves is conducted by subsidiary organizations of the Federal
Agency on Subsoil Use, including the State Reserve Commission
and Central Reserve Commission and its regional departments.
If the commercial feasibility of certain reserves is approved by any
such organization, the reserves are entered in the State Balance of
Mineral Products. Once a subsoil user is granted an exploration,
development or production license, it is required to file annual statistical reports reflecting changes in reserves. In addition, subsoil
users' reserve reports are submitted annually for examination and
approval by the Central Reserve Commission or its regional organizations or, if there has been a substantial change in reserves, by the
State Reserve Commission.
Estimations of reserves, as examined by the state expert organizations and reflected in subsoil users' annual statistical reports, are
accumulated in the State Balance of Mineral Products.
prospecting and exploration work in areas known to contain other
reserve bearing fields.
Category Dl resources are calculated based on the results the
region's geological, geophysical and geochemical research and
by analogy with explored fields within the region being evaluated. Category Dl resources are reserves in lithological and stratigraphic series that are evaluated within the boundaries of large
regional structures confirmed to contain commercial reserves of
oil and natural gas.
Category D2 resources are calculated using assumed parameters on the basis of general geological concepts and by analogy
with other, better studied regions with explored oil and natural
gas fields. Category D2 resources are reserves in lithological and
stratigraphie series that are evaluated within the boundaries of
large regional structures not yet confirmed to contain commercial
reserves of oil and natural gas. The prospects for these series that
prove to be oil- and gas-bearing are evaluated based on geological,
geophysical, and geochemical research.
Furthermore, the Subsoil Resources Law provides that a license
holder may request an extension of an existing license where
extractable reserves remain upon the expiration of the primary
term of the license, provided that the license holder is in material
compliance with the license.
However, in accordance with the Law on Subsoil, mineral
reserves in Russia are subject to mandatory state examination,
and subsoil users cannot be granted a production license with
respect to a field that was not examined. The state examination of
reserves is conducted by subsidiary organizations of the Federal
Agency on Subsoil Use, including the State Reserve Commission
and Central Reserve Commission and its regional departments.
If the commercial feasibility of certain reserves is approved by any
such organization, the reserves are entered in the State Balance of
Mineral Products. Once a subsoil user is granted an exploration,
development or production license, it is required to file annual statistical reports reflecting changes in reserves. In addition, subsoil
users' reserve reports are submitted annually for examination and
approval by the Central Reserve Commission or its regional organizations or, if there has been a substantial change in reserves, by the
State Reserve Commission.
Estimations of reserves, as examined by the state expert organizations and reflected in subsoil users' annual statistical reports, are
accumulated in the State Balance of Mineral Products.