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Santos Ltd

ASX:STO
A$8.54Close 7 Oct 2026 · delayed

Past year: ▲ 35%(6.17 – 8.62 AUD)

Market cap
A$17.79bn
Shares on issue
2.08bn
Story beats
483 since 2006
Last event
19 Aug 2026

Announcements, explained

Each one in plain English, with the numbers worked through for a shareholder.

30 July 2013drilling progress report● Neutral

Winchester-1/ST-1 was at 3,880 m on 30 July, drilling ahead in a 6-inch hole toward an anticipated 4,378 m. Analysis of the discovery log data will take some weeks.

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23 July 2013drilling progress report● Neutral

Winchester-1/ST-1 was at 3,771 m on 23 July, cementing a 7-inch liner after the 18 July discovery. Next it will drill ahead in a 6¾-inch hole. Further log analysis continues.

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18 July 2013drilling result▲ Good

Octanex, Santos's 25% partner in WA-323-P, confirms the Winchester gas discovery, about 40 m net pay in a 107 m gross interval. It will pay 25% of deepening costs, capped at A$5m, ending its free carry.

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18 July 2013drilling result▲ GoodMajor

Santos announced a gas discovery at Winchester-1 (WA-323-P, Santos 75% operator), with 40 m of net gas pay between 3,614 and 3,721 m. It is Santos's fourth straight offshore WA gas discovery, after Crown, Bassett West and Bianchi; the well will be deepened.

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16 July 2013drilling result▲ Good

Tap Oil reports Bianchi-1, a Zola appraisal well in WA-49-R, found 112 m of net gas pay from 4,780 m to total depth of 5,429 m. Santos holds 24.75%; the well is being plugged and abandoned as planned.

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16 July 2013drilling result▲ GoodMajor

Santos confirmed the Bianchi-1 gas discovery in WA-49-R with 112 m of net gas pay, in a separate fault block down dip of Zola-1 (found 2011). Santos holds 24.75; Apache operates. It adds resource in the Zola area.

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16 July 2013drilling progress report● Neutral

Winchester-1/ST-1 was logging at 3,730 m on 16 July after re-drilling the Triassic sandstones. Octanex's free carry ends at this depth, and it will pay 25% of the 6¾-inch section, capped at A$5m.

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9 July 2013drilling progress report● Neutral

Winchester-1/ST-1 was at 3,464 m on 9 July, running in to drill the 8½-inch sidetrack after plugging back. The sidetrack will re-penetrate the Triassic sandstones with gas shows, then be logged.

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4 July 2013farm in farm out completion▲ Good

Central Petroleum says it completed the EP97 farm-out to Santos covering the Simpson, Pellinor and Bejah blocks. This finishes the Amadeus and Pedirka farm-out announced 4 April and resolves the deferred EP97 portion.

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3 July 2013drilling progress report● Neutral

Beach's June report mostly covers its own wells. In Santos-operated Cooper work, Cowralli-25, -26, -15 and -16 were suspended, Van der Waals-1 reached 3,726 m and was suspended for evaluation, and Karmona-6 was suspended for production.

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2 July 2013drilling progress report▼ Bad

Winchester-1 took an influx from an over-pressured zone, then the drill string stuck and was severed. Santos is preparing a sidetrack at 3,803 m, targeting Triassic sandstones where gas shows were seen. Significance is unassessed until logging.

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18 June 2013drilling progress report● Neutral

Winchester-1 was at 3,660 m on 18 June, drilling ahead in the 8½-inch hole toward the zones of interest. Planned depth remains 4,803 m. No result yet.

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12 June 2013drilling progress report● Neutral

Winchester-1 (Santos 75% operator) was at 3,543 m on 12 June. The 9⅞-inch casing is cemented and drilling of the 8½-inch hole into the target zones is next. No result yet.

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7 June 2013drilling result▲ GoodMajor

Santos announced a gas discovery at Bassett West-1 (WA-408-P, Santos 30%, Total operator), with 7.5 m of gas pay in Jurassic sandstones at 5,239 m total depth. It is the first result from the Browse drilling flagged earlier; the overall resource size still needs more work.

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6 June 2013drilling progress report● Neutral

Beach's weekly drilling table mostly covers its own wells. In Santos-operated Cooper gas, Cowralli-25, -14 and -24 and Juno-6 were cased and suspended as future producers, Cowralli-15 was logging at 3,299 m, and Van der Waals-1 was drilling at 3,044 m.

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5 June 2013drilling progress report● Neutral

Beach's May report mostly covers its own wells. In Santos-operated Cooper gas, Cowralli-24 and -14 were suspended, Juno-6 was suspended for production, and Van der Waals-1 was at 3,034 m coring the Roseneath Shale.

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4 June 2013drilling progress report● Neutral

Winchester-1 (Santos 75% operator) was at 3,274 m on 4 June and drilling ahead in the 12¼-inch hole toward a casing point near 3,540 m. No result yet.

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28 May 2013drilling progress report● Neutral

Winchester-1 (Santos 75% operator) was still at 2,891 m on 28 May. The 14-inch casing is cemented and the well is preparing to drill the 12¼-inch hole toward about 3,610 m. No result yet.

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21 May 2013drilling progress report● Neutral

Winchester-1 (Santos 75% operator) was at 2,891 m on 21 May. The 17½-inch hole is finished and 14-inch casing is being cemented, before drilling the 12¼-inch hole. No result yet.

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8 May 2013drilling progress report● Neutral

Beach's April report mostly covers its own wells. In Santos-operated Cooper Basin gas, Cowralli-22 and -23 were suspended as the first of 16 Cowralli development wells, and Van der Waals-1 shale gas well was drilling at 2,449 m. Lepard-2 and Psyche-7 were also suspended.

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7 May 2013drilling progress report● Neutral

Winchester-1 (Santos 75% operator, Octanex 25% free carried) was at 2,164 m on 7 May, drilling the 17½-inch hole toward a casing point near 2,930 m. No hydrocarbon result yet.

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1 May 2013drilling progress report▲ Good

Senex's April report mostly covers its own wells. For Santos's Cuisinier campaign (Santos 45% operator, Senex 15%), Cuisinier-8 found about 6.8 m net oil pay and will be suspended as a future producer; Cuisinier-10 spudded 26 April.

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30 Apr 2013drilling progress report● Neutral

Winchester-1 (Santos 75% operator) was at 1,875 m on 30 April, with 20-inch casing cemented and blowout preventer tests under way. Next is drilling the 17½-inch hole to about 2,930 m. No result yet.

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23 Apr 2013drilling progress report● Neutral

Winchester-1 (Santos 75% operator) was at 1,756 m on 23 April and drilling ahead in the 26-inch hole toward the 20-inch casing point. No result yet.

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16 Apr 2013drilling progress report● Neutral

Winchester-1 (Santos 75% operator) was at 845 m on 16 April, nine days after spud, with the conductor set and the 26-inch hole being drilled. No hydrocarbon result yet.

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8 Apr 2013drilling spud● NeutralMajor

Santos spudded Winchester-1 in WA-323-P at 23:00 on 7 April 2013, targeting Triassic reservoirs to 4,803 m in about 75 m of water, roughly 80 days of drilling. Santos holds 75% and Octanex 25%, free carried.

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4 Apr 2013drilling progress report▲ Good

Senex's March report mostly covers its own wells. For Santos, Cuisinier-7 (Santos 45% operator, Senex 15%), the first of the five-well campaign, found about 6.2 m net oil pay in the Murta Formation and will be suspended as a future oil producer.

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4 Apr 2013drilling scheduled● Neutral

Octanex says Santos, operator with 75% of WA-323-P and WA-330-P, will spud the Winchester-1 exploration well within days, targeting Triassic reservoirs to 4,803 m over about 80 days. Octanex's 25% is free carried. Winchester was previously listed as unreported.

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4 Apr 2013farm in farm out completion▲ GoodMajor

Central Petroleum completes its farm-out to Santos over most of the Amadeus and Pedirka Basin areas (over 18.7 million acres), following the October 2012 deal. The EP97 portion is deferred until the Rawson Resources transaction completes.

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3 Apr 2013drilling progress report● Neutral

Beach's March report mostly covers its own wells. Santos-operated Cooper items: Baryulah gas program finished with Baryulah-14 suspended, Burke-12 and Goyder-6 suspended as gas producers, Cowralli-22 drilling as first of 16 pad wells, and Achilles-1 abandoned with no hydrocarbons.

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