TAG Oil Falls 53% as Its Egyptian Well Waits for an Acid Treatment

Brine came up and oil did not. TAG Oil Ltd. reported on 19 October 2026 that a nitrogen-assisted clean-up of its newest well in Egypt brought no oil from the target formation to surface.

The company's own explanation is that the rock near the borehole is choking the flow. It plans to treat the well, called T-200, with acid and test it again. The share price did not wait for that second test. TAG Oil closed at C$0.04 on the TSX Venture Exchange, down 52.94 per cent, on 13,961,788 shares, per end-of-day data read at 13:21 Pacific on 19 October 2026 on TMX Money.

What the well was meant to prove

T-200 is a vertical well at the Badr Oil Field, on the BED-1 concession in Egypt's Western Desert. TAG Oil drilled it to test the Abu Roash "F" formation, a limestone the company describes as naturally fractured at this location. In a fractured limestone, oil sits in the tiny pores of the rock and moves mainly through cracks, so whether a well flows depends on whether it connects to those cracks.

The company spudded the well in early August and said it expected about two months of drilling and completion. If the well succeeded, the plan was to put it straight into production through an early production facility, according to the company's 6 August 2026 release. That plan is why the test mattered more than an ordinary exploration result would.

In the second quarter of 2026 the two producing BED-1 wells averaged 66 barrels of oil per day, gross, according to the company's results release of 27 August. Crude oil sales from BED-1 in the same period were 53 barrels per day, according to the same release. In its 12 October 2026 release the company's Executive Chairman described T-200's on-budget operations as an important milestone for the BED-1 program. T-200 is the company's current test of the Abu Roash "F" plan.

The logs found oil-bearing rock

The first half of the evidence came in on 12 October 2026. TAG Oil said the well reached a total depth of 4,160 metres, the bottom 58 metres of it in limestone with good oil shows.

The company's preliminary interpretation of its wireline logs counted 14 metres of net oil pay. Net pay is the thickness of rock that the logs judge to hold recoverable oil, after the tight or wet layers are removed.

Porosity is the share of the rock that is open space, and in this interval it averaged 8 per cent with a peak of 10 per cent, according to the company. The release pointed to natural fractures as the source of permeability, which is the property that lets oil move.

Logs measure what is in the rock. They do not measure whether it will flow. The company said so itself on 12 October, calling the interpretation preliminary and stating that it did not guarantee commercial production.

The test brought up brine and no oil

The second half arrived on 19 October. To start the well, TAG Oil pumped nitrogen through coiled tubing to push out the brine left in the hole. Nitrogen lightens the column of fluid so that the reservoir's own pressure can push oil up behind it.

Over the final 48 hours of that work, no formation oil reached surface. The company drew its own conclusion from what it saw: restricted flow, which it said was potentially associated with near-wellbore formation damage or reservoir skin.

Skin is the engineering term for a zone of damaged rock immediately around the borehole. Drilling mud and fine particles can plug the pores and cracks there, so a reservoir that holds oil can still look dead at the wellhead. The company described this interpretation as preliminary.

Acid is the next step

TAG Oil has shut the well in so that the drilling rig could be released, which stops the daily cost of keeping a rig on site. The company plans an acid stimulation, then a re-test. Acid stimulation in a limestone means pumping acid into the well to dissolve the damaged zone and reopen the paths into the fractures behind it. Limestone dissolves in acid, which is why this is a standard repair for this kind of rock. In the company's words, the aim of the treatment is to improve wellbore clean-up and restore formation flow capacity.

After the re-test, the company said it will monitor pressure and decline behaviour to estimate a stabilised production rate. That is the figure that would show whether T-200 can feed the early production facility. The release says there is no assurance the treatment will succeed or that the well will flow oil at commercial rates.

The release gave no date for the acid job. It named one firm date: a further update with the third-quarter 2026 operating and financial results on 25 November 2026.

What the share price did with it

The fall took TAG Oil from a previous close of C$0.085 to C$0.04 on 19 October, which cut the company's market value by more than half in a session. Turnover ran at about 58 times the 30-day average, according to QuoteMedia data for the day. The 19 October release was the only document the company published that day. Oil itself was firm: front-month WTI crude settled at US$101.41 a barrel on 16 October 2026, the last session before the release, and the most-traded December contract was at US$98.37 late on 19 October 2026, according to CME Group.

The 19 October release and the TSX Venture Exchange quote page carry no reference to a share consolidation, a halt or a relisting, so the 52.94 per cent figure is a move in an unchanged share count.

The money behind the next test

The balance sheet is the context for the acid treatment and re-test. On 30 June 2026 the company reported C$10.4 million in cash and cash equivalents and C$10.3 million in working capital, and said it had no debt, in its 27 August 2026 release summarising its interim statements.

That cash figure predates most of the T-200 spending, which began with the spud on 6 August. The company described the drilling as on budget and did not give the budget in dollars, so its cash today is lower than the 30 June 2026 balance by an amount it has not yet reported. The 25 November results will show it.

At the close, QuoteMedia put the company's market value at about C$13.7 million. Set against the 30 June 2026 cash balance, the 19 October market value is higher by about C$3.3 million, before the unreported well costs are taken off the cash side.

What comes next

T-200 has produced two documented results in a week. The logs show 14 metres of oil-bearing limestone at the depth the company targeted, and the first clean-up did not bring that oil to surface. Both statements are the company's own, and neither is the last word on the well.

The company attributes the restricted flow, on a preliminary interpretation, to near-wellbore damage or reservoir skin, and describes acid treatment as a primary method in carbonate reservoirs. The re-test will show whether that interpretation holds.

The re-test result, and the stabilised rate that follows from it, will tell more than either document published so far. The company's next scheduled word is 25 November.