ERHClongtimer, based on the "shear" depicted along the faults in that graphic, you are looking "end on"... like looking through a straw. Now picture each one of those "domes" of gas and oil, and think about looking through that straw. How long is the straw?
There was been mention of "hanging cliff" traps that go on "forever"... obviously he was embellishing, but Schrull knows his geology... the potential is giga-huge.
IMO, AKPO's complex structure is what caught the overflow once the traps along these long JDZ's faults filled.
AKPO is the JDZ's "spillage".
JMHO.