ERHC Energy Inc (ERHE)

[xxmmax]

This is a link to the San Tome Website map. I think the EEZ is outlined in BLUE. The JDZ appears to have been included in the EEZ on your map. I got this from a RB post talking about timeline (which is also worth a look).

AN OVERVIEW OF HYDROCARDON POTENTIAL IN SAN TOME

http://www.juristep.com/stpfile/guias_/hydrocarbon_potential_stp_npa.pps

the site is tricky to work, but worth the wait.
also talks about onshore drilling, which is how they accessed all of Prudo Bay Alaska from 5 acres.