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Geology and Exploration Potential along the Karpinsky Ridge
17.01.2017

Geology and Exploration Potential along the Karpinsky Ridge

Our Exploration team has been involved in evaluation of prospective resources of over 10.0 billion BOE in the Karpinsky Ridge Basin, Rostov Oblast which lies between the Black Sea and Caspian Sea.
As announced earlier, the AGR team of geologists and reservoir engineering professionals are assisting Karpinsky Oil and Gas (KOGC) in their development of a promising oil and gas license blocks in the Karpinsky Ridge Basin in the Rostov Oblast, Russia. The project in case was used as case study for a paper presented at the EAGE conference and we publish here the abstract of the paper.

The licenses in the Karpinsky Ridge

rostov

The licence is operated by KOGC-owned CJSC Rostneftegaz Geo (RNGG) which holds 100% of the Gashunsky and North Donskoy license blocks in the Karpinsky Ridge covering an area of 4,958km².  

Prior to AGR being assigned to the project, the Karpinsky Ridge had not attracted any serious exploration attention due to the prevailing assumption that the rocks constitute a highly metamorphosed and dislocated basement and due to the lack of identified structures and poor imaging below the Base Cretaceous. This resulted of a short maximum offset of the seismic data and processing techniques.

In more recent years, however,  the interest has increased due to the acquisition of longer offset seismic data.

There are still a few wells drilled. CJSC Rostneftegaz Geo (RNGG) has systematically acquired most of the modern closely spaced seismic in the region in their licenses (shown in the figure below).



Seismic data base

Geologically, source, seal and reservoir rocks have been deposited in the region from the Devonian to the present. Though due to tectonic events within the RNGG licenses, Permian through Jurassic sediments are not expected to be present or of any great thickness. Thus the primary reservoir rocks will be Carboniferous in age.

From a petroleum systems perspective, there are numerous multi level prospects to be found. The main risk is the maturation to the sourcing of these structures. The regional thermal gradient map shown below indicates that the region is fairly warm.

kogc

To put this in perspective the global average is 35C/1000m.

This may be of concern but more recent research indicates that once oil has been generated, a much higher temperature is required to convert the oil to gas. This makes the region much more prospective. 

Interested to find out more about the project? Please contact our Exploration team.

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