Highlights

  • Brookside Energy has completed the two-well zipper-frac stimulation program at the Suttles Pad in Oklahoma.
  • All 64 planned stimulation stages were pumped across the Sabres and Whalers horizontal wells.
  • Operations are moving to plug drill-out, production tubing installation and flowback, while final surface Facility work proceeds in parallel.
  • Brookside holds an approximate 70% working interest in both wells, which are expected to move to sales after final commissioning.

Brookside Energy Limited (ASX:BRK) is a U.S.-focused oil and gas producer operating in the Anadarko Basin, with its activities concentrated in the SWISH Area of Interest within Oklahoma’s southern SCOOP. BRK shares were quoted at A$0.40 on 5 October 2026. The latest operational update confirms completion of the stimulation phase at the company-operated Suttles Pad, advancing the Sabres and Whalers wells toward flowback and eventual sales.

All 64 Stimulation Stages Completed

On 5 October 2026, Brookside reported that stimulation operations had concluded on the Sabres 2-1-1S-3W SXH1 and Whalers 2-1-1S-3W WXH2 wells at the Suttles Pad in Carter County, Oklahoma.

The two wells were completed through a zipper-frac program, with all 64 planned stimulation stages pumped according to the program design. Following completion of the stimulation work, both wells were secured and the frac spread was released from the location.

The photograph on page 1 shows the stimulation operation at the Suttles Pad, including the frac spread, sand storage infrastructure and the site’s tank battery. This illustrates that the development is now moving beyond the hydraulic stimulation phase toward completion and production-related activities.

Sabres and Whalers Target Separate Formations

The two wells target different geological formations within Brookside’s Oklahoma acreage. Sabres targets the Sycamore Formation, while Whalers targets the Woodford Formation.

Brookside holds an approximate 70% working interest in the two wells, meaning the company carries roughly the same proportion of development and operating expenditure while retaining a corresponding share of production before other applicable interests.

The latest release does not provide initial production rates, hydrocarbon volumes or updated reserve estimates because the wells have not yet progressed through flowback and into sales.

Operations Shift Toward Flowback

With stimulation complete, operations are transitioning into plug drill-out, installation of production tubing and flowback. These steps are required before the wells can move into commercial production.

Final surface facility work is also being completed in parallel. Brookside stated that the sales line has already been installed and two compressors are in place. The company plans to bring the wells to sales following final commissioning.

The update therefore marks completion of one major construction and completion phase, but production performance remains to be established once flowback and sales commence.

Suttles Pad Adds to Brookside’s SWISH Development

Brookside’s operating focus is the SWISH play within the Anadarko Basin, where the company has been developing an oil and gas production base alongside its drilling inventory.

The Suttles Pad represents another operated development within this area. The latest release is focused entirely on operational progress and does not provide financial metrics such as drilling expenditure, completion cost, Revenue expectations or anticipated payback periods.

It also does not provide year-on-year production, revenue, Earnings or cash-flow comparisons. Accordingly, there is no new financial increase or decline that can be quantified from this particular announcement.

Production Data Yet to Be Reported

The next operational phase will provide the first indication of well performance. Flowback allows fluids used during stimulation to return to surface while Hydrocarbons begin flowing from the completed formations.

Brookside has not disclosed an expected date for initial production results in the 5 October announcement. The company has only confirmed that the wells will move to sales once plug drill-out, tubing installation, flowback and final facility commissioning have progressed sufficiently.

As a result, investors do not yet have updated initial production rates from Sabres or Whalers against which to compare earlier Brookside wells.

Closing Perspective

Brookside Energy’s latest update confirms that the Suttles Pad has progressed through its full 64-stage stimulation program without the company reporting a change to the planned design. Attention now shifts to plug drill-out, tubing installation, flowback and commissioning before Sabres and Whalers can enter sales. The update represents an operational milestone, although production rates, revenue contribution and other financial impacts will only become clearer after the wells are brought online.