Ann: Strong Gas Shows in Multiple Upper & Lower Angwa Reservoirs, page-449

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Grfe4

773 Posts.

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25/10/23

19:42

Post #: 70538119
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Originally posted by Grfe4: ↑

When I said "I thought they would have drilled as deep as possible", you replied "I'm sure they will drill as deep as they can but their appetite for risk will have been curtailed after M-1".

If a 6" hole section had been planned properly before spudding M-2 it would not have involved greater risk. They should have known the UA and LA are thicker at the centre of the field and we have seen from the seismic section that the base of the LA is 4500m. That means they should have planned to TD closer to 4400m. Why was the TD chosen as 3750m MD? There is no doubt in my mind that they would never have reached 4400m by continuing in 8.5". Now that a sufficiently long interval has been drilled in the LA for obtaining MDT pressures and a fluid sample, wouldn't it be wiser to TD this section sooner than later and focus on getting the all important fluid samples from the LA and UA?

The 6" through the LA could be drilled at a later date, but as they will not need a rig for testing next year, there will be additional expense associated with mobilizing a rig back to the M-2 location at some future date.

The disadvantage of TDing now is they will not have log and swc data to assess if there is diagenesis in the deeper section, and the well testing next year will only be on the top sand in the LA.

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I would also like to add that you appeared to be negative about drilling deeper than 4000m because you think there is a much greater chance of diagenesis (porosity loss) at that depth. Isn't it the case that the risk of diagenesis is increases significantly when an aquifer is close by? At M-2 they are far from the flanks of the field and therefore far from the aquifer.

IVZ Price at posting: 18.5¢ Sentiment: Buy Disclosure: Held
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