Abstract
ABSTRACT Hot oiling as a paraffin removal process and general maintenance technique has been used for years in petroleum production. It is still one of the first tried methods of restoring low or lost production whether due to paraffin or mechanical problems. Hot oiling is so readily accepted that formation damage that develops over years may not be associated with the hot oiling process. The chances of hot oiling causing formation damage are related to the characteristics of the oil used (cloud point, API gravity, chain length of paraffin, percent of paraffin and volatility), the source of the oil, the downhole temperature of the formation and the hot oil process itself. Each of these areas of possible problems will be reviewed and suggestions will be made to minimize or eliminate them. Laboratory tests will be presented for determining if a crude could cause formation damage when used for hot oiling. Field results will be presented for successful cleanup of hot oiling produced formation damage.
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