Not sure if my analagy is going to be correct, and I look forward to someone correcting it if not.
Lets imagine that this potential reservoir is a pudding bowl (upside down). The crest of the bowl, the highest point and also the one with the greatest depth, is in the middle. As you go towards the edges so the depth of the bowl (due to the tapering height) becomes less.
So Ascent have drilled (and this was a geologic well aimed at gathering data in an area with poor seismic coverage) and suddenly found themselves in a potential reservoir section with oil. However, they have drilled on the outside of the "pudding bowl", the flank.
They have lost what appears to be around 7000 barrels of drilling fluid into the formation. This likely explains why they stopped the deepening of the well early (they were due to extend the well to 2000m from 1000m, however stopped after only a few hundred metres, when you take in just how much drilling fluid they lost, it probably explains why (on top of the fact they know from the seismic that they are on the outside of the "pudding bowl" (the flank)) why they stopped the deepening. If you note from the 28th June RNS they clearly state "Final depth of the well will be determined by the nature of the formations encountered and also, by the volumes of lost drilling fluid, the recovery of which may be necessary during the testing phase." My "rose tinted" specs thinking is they just simply run out of drilling fluid, and rather than keep putting more and more in, they had better stop, take it out, test and then better spend the money drilling the crest well Anagni-2, as they could only gain so much info from a flank well like Anagni-1.
The next wells (already submitted for approval) will now, after using the new seismic just taken, be drilled "updip" or if you like "up pudding bowl", and target the centre point of the "pudding bowl" (being "crest" drills). These wells will therefore give them the maximum depth of the play (and we still have no clue as to how deep this might go, it could be 1500m, 2000m, 3000m, 5000m.....nobody knows) and so how deep the potential play is might be the 450m already found, it might be 1000m of play, might be 2000m of play.......again, nobody knows).
Anagni-1 should we hope produce some oil, even if as it is drilled on the flank and that will be the sign that this is a real oil find of what might be major size. Failure to produce at Anagni-1 will not be the end of the story, as it is a flank well, failure would be when the crest well Anagni-2 is drilled and if that failed to produce too imv.
Where it gets all very technical is how they drill "Anagni-2".....there are such things are "underbalanced" drilling which if (hope I am correct) "very overbalanced drilling" pressures the drilling fluid into the reservoir, "underbalanced drilling" will not and will encourage the reservoir fluids to enter the wellbore, or there is "air drilling" where no fluids are used etc... Don't ask me how they will drill it, thats perhaps a question for JE at the Oil Barrel Conference on the 20th Sept for anyone going to it.
For those expecting terrific flows, given its a flank well, you'll not be getting that imv.
The top of the formation is where the pressure is the highest, as oil and gas migrate upwards until they hit a "seal" and it is there at the top point of this seal were the maximum pressure is. By AST hitting the side (flank) they will be in an area where pressure will not be at its highest.
My summary will be, if Anagni-1 does not flow oil at high levels, its not a concern as its a flank well, however it is a very very positive sign that a crest well drilled to bottom point will be very commercial.
Something at Anagni-1 is pushing behind the drilling fluid and allowing a 200bpd pump to pump out that infiltrated drilling fluid at 200bpd.
Rome was not built in one day, and the absolute potential of this newly found structure will not be known from just one drill. Patience and a wait for Anagni-2 is the key, however, in the meantime, Anagni-1 progress can keep derisking the structure.
So far all the pointers are positive, the next pointer will be a slightly increasing oil cut in the drilling fluids being recovered. The pointer after that will be an increasing oil cut again. Final pointer will be the flow of some oil after all the driling fluid is out, if you get all those three pointers, then a crest well to bottom point via Anagni-2 will be very derisked into leading to what could be a large and commercial oil field.
This little picture might help explain (again it just an opinon), and like I said, it just my analagy (pudding bowls) to try to put things into simple terms...........and I await to be corrected by those who know much more than me - I just like to think of things in simple to understand terms. The below is based on a anticline, however the position of the wells and therefore updip/pressure is explained, I think.