Excessive casing gas pressure within a client’s heavy oil production field was negatively impacting emulsion production. Vista was engaged to design a pipeline revision to alleviate casing gas backpressure at the wellheads. A portion of the existing above-ground pipeline infrastructure was looped. Approximately 600 metres of above-ground CSA pipeline was installed parallel to the existing line, starting at the drilling pad and terminating at the oil battery. Subsequent stress analysis was conducted.
Casing gas pressure at the wellheads was reduced by approximately 29 percent. Resulting increased emulsion production levels are still being analyzed.