References
- Butler , R. M. and Jiang , Q. 2000 . Improved recovery of heavy oil by Vapex with widely spaced horizontal injectors and producers . J. Canad. Petrol. Tech. , 39 : 51 – 60 .
- Butler , R. M. and Mokrys , I. J. 1991 . A new process (Vapex) for recovering heavy oils using hot water and hydrocarbon vapour . J. Canad. Petrol. Tech. , 30 : 97 – 106 .
- Butler , R. M. and Mokrys , I. J. 1998 . Closed-loop extraction method for the recovery of heavy oils and bitumens underlain by aquifers: The Vapex process . J. Canad. Petrol. Tech. , 37 : 41 – 50 .
- Das , S. K. and Butler , R. M. 1994 . Effect of asphaltene deposition on the Vapex process: A preliminary investigation using a Hele-Shaw cell . J. Canad. Petrol. Tech. , 33 : 39 – 45 .