ABSTRACT

Since 1962 Michigan Consolidated Gas Company has been in the process of rehabilitating some 220 wells in the 25-year old Reed City Oil Field. The project was undertaken for the purpose of gas storage and the secondary recovery of oil by gas injection and recycling. Since integrity of the wells is of prime importance in a project of this nature, a Cement Bond log was run as a matter of routine. This program was supplemented by running Gamma Ray-Neutron logs. The various aspects of a Cement Bond logging program involving 25-year old rotary and cable tool completions, as well as re-entering abandoned wells and evaluating liner jobs, are discussed.

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