surprise field/s top/bottom..3d will ..., page-7

drilling update 2/12/2011:
"The Surprise ST-1 well has reached a Total Depth of 2,732m RKB within the Pacoota Sandstone. No further oil shows have been recorded within this unit which directly underlies the Horn Valley Siltstone."

The trap is not directly below Surprise. It is down-dip towards the base of the fold between S-1 and JW-1 (see preso).

Draw a horizontal line 300m below S1 and you will see the line passes through the base of the bowl. Oil is collected there. It is a salt-related structure.

All new info consistently support the theory that salt has fractured the HVT, and rising salt pushed oil into the sandstone. Given the geology and shape of the fold, this could be one huge pool of oil.