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Inside contour flooding. Inside contour flooding is used
mainly for development of oil deposits of large areas. It is used on
the Romashkinskoye field in Tatarstan, the largest in the U.S.S.R.
in the early 50s. This flooding was used in 1948 on a small field
Uisson in Arkansas in the USA. Later, inside contour flooding
found application in other fields of the United States, including
such large fields as Kelly-Snyder and Spraberri. The transition
from the edge flooding to the inside contour flooding can
significantly accelerate development Romashkinskoye field was a
major step in the development of oil fields. Action to layer, in this
case, is carried out through injection wells placed at varying
schemes inside the oil-bearing contour. This system is the most
intense action on oil deposit. The advantage of the inside contour
flooding is a possibility to start developing from any area and, in
particular, to introduce the development of the first area with the
best geological and exploration characteristics, the largest reserves
and high production flow rate of wells.
Inside contour flooding allows in 2-2.5 times increase the
rate of development compared to the edge flooding significantly
improve technical and economic indicators of development.
Block system of development is one of inner flooding
contour systems.
Block development system. Block systems of
development are used in fields of elongated placing rows of
injection wells mostly in cross-section (Fig. 4.4). As shown in Fig.
4.4, the rows of water injection wells cut only deposit in certain
areas (blocks) development. Reservoir there may be developed by
blocks independently. Block systems of development have many
advantages. Block systems can increase in 2-3 times the rate of oil
recovery, reduce the number of injected water and accelerate input
field in development compared to the edge flooding. The most
modular distribution block system of development is acquired in
the fields of Western Siberia (Russia).

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