Reinterpretation of seismic data – Geoprime

A reinterpretation of the seismic data encompassing both older profiles from the Soviet period and modern ones collected between 2007 and 2009 by major oil company Sibneft for a large area was ordered in 2012/2013. The order went to renowned Russian company Geoprime (partially owned by major international companies Schlumberger and Integra). Geoprime identified three very interesting formations in the deeper Devonian layers. This data was correlated with information from the logs of the two existing wells. The result is that Geoprime sees four potential hydrocarbon-saturated intervals. Geoprime estimates in a mineral resource estimate according to Russian standard that the licence block in total contains the equivalent of 130 million barrels of oil equivalent in category C3, which means that they are potentially extractable and with an assumption that the hydrocarbons are primarily gas and the rest is oil and gas condensate. This is by no means a reserve assessment. It is an estimate of potential mineral assets/resources.

The estimated hydrocarbon-bearing zones altogether have a total thickness of approximately 148 m. The interpretations confirmed the Company’s own estimates and geological models and correlates with previously collected historical data. As far the Company knows, these seismic maps are the first ones that, with modern tools, systematically cover the deeper Devonian layers in this part of the Tomsk region and possibly the entire Tomsk region. They are based on 600 line kilometres of seismic data, divided into 13 profiles.


Explanation of image:

The licence area is marked off as a red triangle. Blue lines are 2D seismic data from 2008, the black line is profiles from the 1980s. Black circles, “P-X”, are drilled wells, with their depth listed at the bottom of Jurassic. The red circle is a recommended spot for drilling the first new well, P-6. Grey lines are isocurves pertaining to reflecting horizons, in metres. The thicker grey line is the forecast reservoir distribution. The purple line with a line pattern refers to the three large Devonian/Palaeozoic horizons.



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