PetroNeft Resources wholly owned subsidiary «LLC Lineynoye» won the State Auction for the Ledovy Licence No. 67 in the Tomsk Region of Western Siberia in December 2009 for 42 million Roubles (US$1.39 million). In January 2010 Arawak Energy exercised their right under the AMI agreement to participate in Licence 67 for 50%, however PetroNeft remains as operator.
The Ledovy Licence area is located west of the Ob River in the main oil bearing part of the Tomsk Oblast (Figure 1). The Licence has an area of 2,447 km2 and is surrounded by proven and producing oil and gas fields. Two producing oil fields, Grushevoye and Lomovoye, containing about 90 million barrels of C1+C2 reserves are located within the Licence area, but are excluded from the Licence. However, two existing drilled structures, Ledovoye and Sklonavaya, included in the Licence area have previously tested oil and may form the basis of a future development project (Figure 2).
The Vasyugan-Raskino oil pipeline and electric power lines run through the middle of the Licence area. There is a paved road that runs to Strezhevoy through the northwestern tip of the Licence area.
Exploration on the Ledovy Licence began in the 1950s with wells being drilled on large prospects identified by vintage seismic data. Modern 2D seismic data was subsequently acquired from 1980 to 2001. Russian registered C3 (possible) resources are currently 55 million barrels.
A total of 8 wells have been drilled on the Licence. PetroNeft has reviewed the drilled and currently mapped undrilled structures and believes that there is significant upside within existing discoveries, potentially by-passed pay and new exploration prospects within the block. Two of the previously drilled structures, Ledovoye and Sklonavaya, have tested oil but have not to date been assigned any C1+C2 (proved and probable) reserves. PetroNeft believes that these discoveries have potential to form the basis of a future development project on the Licence, but also intends to pursue an active exploration programme.
Source rocks are present in the Lower Jurassic Togur and Upper Jurassic Bazhenov formations. Nearby oil fields produce primarily from Upper Jurassic sandstone reservoir objectives and also Cretaceous sandstones.
The Licence is a 25 year exploration and production licence that is valid until 2035. The minimum work commitments are to re-analyse the data from old wells and seismic surveys, acquire 750 km of new 2D seismic and drill one well within 3 years. The bid consideration was 42 million Roubles (US$1.39 million).
The 2010 work programme focussed on the overall re-evaluation of all the previous data on the Licence area with modern technology. Well and seismic data was reprocessed and the results of this evaluation will be used to acquire 750 km of new seismic data, which will help to determine the exploration priorities for the Licence area.
In 2011/2012 two wells were drilled, one at the Ledovoye oil field and a second at the Chermshanskaya prospect. These wells resulted in the discovery of a new oil field at Cheremshanskoye (December 2011) with three separate oil pools and the confirmation of the Upper Jurassic J1-3 oil pool at Ledovoye field with a potential new oil pool discovery in the lower Cretaceous (February 2012).
The Licence is within Western Siberia and thus fell within the 2008 Area of Mutual Interest agreement between PetroNeft and Arawak Energy Limited (Arawak). Under this agreement Arawak is entitled to participate in up to a 50 percent interest in the Licence. They exercised this right in January 2010. PetroNeft remains the operator of the Licence.