RE: Royston commerciality24 Aug 2023 07:32
Royston-1X
The Company has completed its program of five production test intervals at Royston-1X. Touchstone is currently evaluating the uppermost prospective intervals in the Herrera and Karamat formations. The well is shut-in while awaiting the arrival of a service rig which will be used to put the well on pump to facilitate further testing.
As previously reported, the lowermost section of the Royston-1X well in the subthrust sheet of the Herrera Formation was initially completed at depths between 11,102 and 11,168 feet. Swabbed oil volumes were analyzed by a third party confirming between 34.1 to 40.0 degrees API gravity formation crude oil, representing the deepest oil encountered on the Ortoire block to date. The maximum shut-in pressure observed at surface was 2,534 psi, however, this section of the formation was interpreted to have a low permeability reservoir.
The second production test evaluated the subthurst sheet of the Herrera Formation at depths between 10,604 and 11,020 feet. Light, sweet oil was recovered measuring 35.4 degree API gravity. The maximum shut-in pressure observed at surface was 2,450 psi. Similar to the first testing interval, the formation exhibited a low permeability reservoir with minimal natural oil flow to surface. Touchstone suspended the first two intervals with a retrievable plug, allowing us the opportunity to reevaluate the subthrust sheet at a further date for potential fracture stimulation.
The third production test evaluated the intermediate sheet in the Herrera Formation at depths between 10,220 and 10,314 feet. 38.3 degree API gravity crude oil was encountered, with a maximum shut-in pressure observed at surface of 2,331 psi.
The fourth production test evaluated the overthrust sheet in the upper Herrera X Formation at depths between 9,591 and 9,662 feet. 38.1 degree API gravity oil was encountered, with a maximum shut-in pressure of 2,438 psi.
The final production test targeted the Karamat Formation at depths between 9,318 and 9,346 feet. Once again, light, sweet oil was recovered with a maximum shut-in pressure observed at surface of 2,230 psi.
Royston commerciality
Although high reservoir pressures were observed during each of the production tests, minimal natural flow to surface was observed, indicating low permeability. As a result, Touchstone has now comingled the three uppermost prospective intervals and is waiting for a service rig to place the well on pump. We expect that once the well is pumping, the hydrostatic pressure on the reservoir will be reduced, allowing the formation fluid to produce at increased rates. A further update will be provided following completion of the final evaluation of the three uppermost prospective intervals.
Sign In
Follow the stocks
