Verfahren zur Behandlung der Umgebung des Bohrlochbodens von Tief-,insbesondere Kohlenwasserstoffbohrloechern

摘要

Microcracks are formed in the environs of deep drilled wells, such as oil wells, by heating and then cooling the adjacent strata. This can be accomplished by introducing ammonia into the stratum water at the bottom of the well. The resulting heat of dissolution will slightly heat the strata adjacent to the bottom of the well as the ammonia will chemically assist the displacement of recoverable materials lodged in these strata. The cooling to the initial temperature of the bottom can be accomplished by the presence of additional stratum water in the well.