Rocksource employees have, together with co-authors 
from EMGS, published a scientific paper in The 
Leading Edge, an American journal owned by the 
organisation SEG (Society of Exploration 
Geophysicists) with 35,000 members.
 
The article evaluates statistical results from wells 
drilled on prospects or fields containing CSEM 
(Controlled Source Electromagnetic) data. The key 
finding is that the average success rate for 
exploration wells drilled on prospects with a 
significant CSEM anomaly is twice the average success 
rate for wells drilled on prospects without a 
significant CSEM anomaly. 

John Howell, Chief Technology Officer at Rocksource 
ASA commented: "The data provide increasing evidence 
that the appropriate application of CSEM data in a 
portfolio setting will improve exploration drilling 
success rates in CSEM suitable areas. This empirical 
data, published in a scientific journal supports 
Rocksource's CSEM lead exploration strategy."
 
Of 86 wells with associated CSEM data, 50 are 
exploration wells drilled after the acquisition of 
CSEM data and 36 are calibration surveys collected to 
test the technology. This represents the largest 
database available to date. Of 22 calibration surveys 
acquired over existing discoveries, 19 (86%) show a 
significant CSEM anomaly with normalised anomalous 
amplitude response (NAR) value for the fundamental 
frequency above 15%. Of the remaining 14 calibration 
surveys acquired over prospects that are proven dry, 
13 (93%) show no significant CSEM anomaly. When 
disregarding all calibration surveys, 28 out of 50 
wells are discoveries. When isolating wells drilled 
on prospects with a significant CSEM anomaly, 21 out 
of 30 exploration wells are discoveries. For 
exploration wells drilled on prospects without a 
significant CSEM anomaly, 7 out of 20 wells are 
discoveries. This provides a success rate of 70% for 
wells drilled on prospects with a significant CSEM 
anomaly, whereas it drops to 35% for wells drilled on 
prospects without a significant CSEM anomaly. 

For further information on the scientific article, 
please contact Jonny Hesthammer, Chief Technology 
Officer in Rocksource ASA's subsidiary Rocksource 
Geotech, at +47 99 20 59 89.
 
The presentation is attached to this stock exchange 
notice, and it will also be published on the  
company's web-site www.rocksource.com. 

Oslo, 14.1.2010
Rocksource ASA


Trygve Pedersen
CEO

+47 90 09 77 41