Centurion Grabs A Little More Of Block 4

Centurion Energy International, the Canadian junior partner in Block 4 of the Nigeria-Sao Tome Joint Development Zone, has upped its percentage with the purchase of 2 percent of overall equity from Hercules Corp., which was 75-percent-owned by Centurion, to give it 9.5 percent of the promising block.

The equity sold for $4.4 million, according to a press release issued by the company:

Centurion Acquire Additional Exploration Interests in the Sao Tome Joint Development Zone in West Africa

CALGARY, ALBERTA--(CCNMatthews - Aug. 11, 2006) - Centurion Energy International Inc. (TSX:CUX) (AIM:CUX.L):

Centurion is pleased to announce the acquisition of an additional 2% working interest in Block 4 in the Sao Tome Joint Development Zone (JDZ). This will increase Centurion's interest in the Block to a total of 9.5%.

In order to acquire the additional interest, Centurion will purchase a 25% equity holding in Hercules Petroleum Limited (Hercules) for a cash consideration of US$4.4 million. Since Centurion already owns 75% of the Hercules equity, this company will therefore become a wholly owned Centurion subsidiary once the transaction is completed.

Block 4 covers an area of 212,000 acres and is located in the heart of the JDZ, with water depths of approximately 1800 to 2200 meters. The JDZ represents a potential deepwater extension of the highly prolific Niger delta hydrocarbon province and to date the region has been under explored due to a historic maritime boundary dispute. Over the last few years, however, the JDZ has been opened for exploration and Chevron have recently announced an oil discovery in the JDZ Block 1, which lies immediately to the north of Block 4 and on the same geologic trends.

A 3D seismic survey has already been acquired on Block 4 and the data is viewed as encouraging since it indicates the presence of several large structures with the potential to hold significant reserves volumes. Consequently, the Block 4 Joint Venture is attempting to secure a deepwater rig to drill the first exploration well on the concession in the second half of 2007. This well would be the first of three commitment wells, which are scheduled to be drilled on the Block during the Phase 1 of the exploration licence.

Centurion is a Calgary-based oil and gas exploration and production company, engaged in oil and natural gas activities in Egypt, Tunisia and the Sao Tome JDZ.

For the purposes of AIM Rule 11, this announcement has been reviewed by Centurion Energy's Vice President - Engineering and Production, Robert C. Macaulay, B.Sc., a Petroleum Engineer of more than 20 years' standing, a member of the SPE and a registered Professional Engineer in the Province of Alberta.