Conoco Inc.

J Scott Moore

James C Albright

Kenneth R Pittaway

A test is provided for evaluating and/or designing an enhanced oil recovery process including CO.sub.2 injection. A modified log-inject-log technique is utilized to determine residual CO.sub.2 saturation and incremental hydrocarbon displacement.

Single well test for evaluating CO.sub.2 injection

A method of producing hydrocarbons from a subterranean formation comprising penetrating the formation with a plurality of wells arranged in a pattern defining a series of regular pentagons with a well at the center of each pentagon, injecting a fluid into the formation by way of the wells at the centers of the pentagons whereby hydrocarbons contained in the formation are displaced from the center wells towards the wells defining the pentagons and producing the hydrocarbons by way of the wells defining the pentagons.

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Ponca City, OK, United States of America

J Scott Moore