1. n. [Enhanced Oil Recovery, Heavy Oil]

A non-thermal primary process for producing heavy oil, also called CHOPS. In this method, continuous production of sand improves the recovery of heavy oil from the reservoir. There is both a theoretical basis and physical evidence that, in many cases, wormholes are formed in the unconsolidated sand reservoir, thereby increasing oil productivity. In most cases, an artificial lift system is used to lift the oil with sand.

Alternate Form: CHOPS

See: wormhole