[capitan_refugio]

Most of my experience has been in the Pliocene sandstones (30+% porosity and 1-2 darcy perm [yes darcys, not millidarcies!]) and naturally fractured "shales" of the Miocene Monterey Formation.

The Monterey Fm. also happens to be the major source rock in the area too. When you hit a sweet spot, a Monterey well can been particularly prolific. One offshore well, on Platform Hondo, has produced a little over 30 million barrels of oil in the 20 or so years it has been in production - which I believe to be a domestic record. The only problem is that most Monterey-sourced oil are heavy and sour.

[TexasCowboy]

"[yes darcys, not millidarcies!])"

LOL!
Heck, we're happy to get twenty millidarcies of perm!
It takes a big frac to make it come.