Pre-treating completion strings prior to workovers requires expensive and potentially toxic chemicals to remove bitumen deposits. A safe and cost effective solution is required.
Oilflow has collaborated with a leading SAGD operator to find a solution. A non-toxic concentrated blend of Proflux chemistry was mixed with hot production water and simply pumped down the tubing to mobilize the bitumen deposits.
Immediately after, the well was displaced to kill fluid followed by a hassle-free pulling of the completion string.
>> PROFLUX AS A FLUSH FLUID
>> HOW DOES PROFLUX WORK IN THE COMPLETION AND WORKOVER PROCESS?
When performing a workover or re-completion of a well, the tubing is flushed free of bitumen and debris to ensure there is enough volume available to allow the subsequent kill fluid to effectively hold back formation pressure and kill the well.
Water alone is ineffective as a flush fluid as it tends to channel through the bitumen in the tubing and does not remove enough bitumen to ensure the effectiveness of the kill fluid.
Although xylene and diluent are effective they are very costly, hazardous, and toxic.
Our customers have made a standard practice of pumping Proflux through the tubing using a target of 150% of the tubing volume prior to pumping kill fluid into the well. They have found Proflux to be extremely effective at displacing the bitumen from the tubing. The bitumen displaced from the tubing is subsequently pushed into the formation or circulated out of the hole.
Based on the above experience, we believe Proflux may provide similar benefits in other thermal well workover activities. Your Oilflow representative would be pleased to discuss these opportunities with you.