Material Change Report
Item 1 Name and Address of Company
Oromin Explorations Ltd.
Suite 2000, 1055 West Hastings Street
Item 2 Date of Material Change
June 17, 2010
Item 3 News Release
The news release was disseminated on June 16, 2010 by Stockwatch, Market Wire and Market News
Item 4 Summary of Material Change
The Company announced an update for its Santa Rosa Oil and Gas Project.
Item 5 Full Description of Material Change
See attached news release.
Item 6 Reliance on subsection 7.1(2) of National Instrument 51-102
Item 7 Omitted Information
Item 8 Executive Officer
The following executive officer of the Company is knowledgeable about the material change and may be
contacted regarding the change:
Item 9 Date of Report
June 17, 2010
UPDATE – SANTA ROSA OIL AND GAS PROJECT
Oromin Explorations Ltd. (“Oromin”) is pleased to provide an update on the current status of and plans for its
100% owned Santa Rosa oil & gas concession in the Province of Mendoza, Argentina.
The Santa Rosa concession is a large mineral tenure comprising 7694 km 2 situated over a geological dome
structure centred 91 km east of the city of Mendoza. The Santa Rosa dome prospect is the only known major
structure in the eastern region of the Cuyana Basin. The Cuyana Basin totals approximately 161,000 km 2 and
has hosted over 934 producing wells from 2440 total wells drilled. Initial recoverable reserves in 18 oil pools in
the Tupungato and Cacheuta sub-basins – the northern portion of the Cuyana Basin – total 1.2 billion barrels.
These reserves were found to the west and southwest of our Santa Rosa concession, and there are no known
discoveries of commercial quantities of hydrocarbons on our concession.
In July 2009, Oromin drilled the well SREx-2001 on a postulated high point on the dome, and di