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InterOil from the boards 30/10

October 30th, 2009 · No Comments

More quality than quantity, this time..

Just a single post, but quite noteworthy…

Where is the oil hiding on the Antelope Structure?

I have told you before that the oil column is under all of the Antelope structure, so I will stick with that until proven wrong but I have also told you that much of that oil column is in very tight low porosity/permeability rock. The oil will be hard to get out of the platform rock unless we find it in a fractured zone. I see the oil being in three segments of the reservoir.

1.The very low porosity/permeability limestone platform which will likely be nonproductive.

2. The reef limestone above the platform which has an average porosity of 7% which is likely productive. The pay zone can be several thousand feet thick, depending on how far they can drill horizontally and how many horizontal holes they drill from the vertical hole. For example if we had 257 feet of oil column in the vertical hole and the vertical hole was capable of producing X BOPD and we are then able to drill one 4000 foot horizontal hole or four 1000 foot hole in the oil column then we should expect to produce as much as 15+ times X from the horizontal well bores. Maybe even more since it may be possible to drill the horizontal hole(s) in the very best streaks of porosity.

3. The dolomite reef in the down dip locations where the top of the reef dips as low as the oil column. Of course this assumes that the dolomite cap covers all of the reef including the down dip portions. If we can find oil in the dolomite, either by drilling horizontally or by moving the locations further down dip, we will have some very significant oil wells.

Now where might we look for this oil bearing dolomite? Back to our famous slide at:… Slide No. 10. Now if you will recall we have 2300 feet of gas column in Antelope 1. Now we do not know what the contour interval is on this map but if we start at Antelope 1 and measure down dip to the edge of the red line and count that as 2300 feet it would not be unreasonable to assume the contour interval of this map is 1000 feet for each contour line.

Now at Antelope 1 we had 746 feet of dolomite cap on top of the reef. If we assume that we have 746 feet of dolomite on all of the reef then as we go down dip we might be able to assume that the last 746 feet of reef above the oil/water contact would be oil bearing dolomite with good to very good porosity and permeability. If you look back at Slide No. 10 you will see that the area from the edge of the red line (assume that to be the water contact) to the first contour line going up dip could be about 700+ feet. So I believe it is reasonable to assume, given what we have to work with so far, that the red area below that contour line is oil bearing dolomite. So if you follow that contour line you will see that we could possibly have a very nice oil field all along the south and southeast parts of the structure as well as in the trough around the yellow hole north of Antelope 1. We may just need to move the locations a mile or so southeast to prove or disprove this theory.

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