Abstract

Commercial carbonated waterfloods (Orcofloods) are being carried out in Oklahoma, Texas, and Kansas. Three of these unique floods were initiated in the Dewey-Bartlesville Field, Washington County, Northeast Oklahoma.

The carbonated floods are surrounded by conventional waterfloods in the same reservoir, thus making possible a direct comparison of ultimate oil recovery, water injectivity, and flood life. Increased oil recovery, increased water injectivity, and shorter flood life are economically benefits obtained from the carbonated floods.

Two of these carbonated waterfloods (initiated in 1958) are now almost depleted, thus enabling predictions of ultimate oil recovery. And for comparison, conventional waterfloods (initiated in 1953) which are immediately South and West of the carbonated floods, have progressed to the point where ultimate oil recovery also can be estimated.

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