OREANDA-NEWS. Gazprom Neft has begun geological investigations in Paleozoic hydrocarbon deposits in the Tomsk Oblast. Thus far, the complex structure of the pre-Jurassic complex has not been deemed an independent geological prospect, investigations into which demand the modification of traditional prospecting methodologies. The aim of this project — the first of it’s kind in Russia — is to identify optimum approaches for investigating oil-bearing Paleozoic deposits, allowing greater efficiency in geological prospecting as well as reducing costs, and resulting in an additional 25 million tonnes of recoverable reserves, as well as more than one billion tonnes of hydrocarbons in place, from this region alone.

Investigations into the geological structure and conditions dictating the formation of the pre-Jurassic complex (created during the Paleozoic era) are being undertaken at Gazpromneft-Vostok’s fields in the Tomsk Oblast. The goal of the project is to create appropriate technologies to investigate promising facilities by involving and bringing together all possible information, obtained through various theoretical and experimental approaches, and scientifically adapting and modifying these in line with the underlying geology of the pre-Jurassic complex. Because of its complex structure and the availability of more easily accessible Jurassic- and Cretaceous-era facilities, the Paleozoic section has not been adequately studied, and basic research is expected to reveal new features and patterns.

Cumulative geological and technological factors have allowed three characteristic zones to be identified among the various hydrocarbon accumulations within the Tomsk Oblast, investigation of which will involve six wells being drilled throughout 2017–2019. Specialists from the Gazprom Neft Science and Technology Centre will determine a selection of technologies optimally suited to the geological exploration of the strata of the pre-Jurassic complex. A range of investigations through the first well have already begun.

Kirill Strizhnev, Executive Director of Gazprom Neft’s Bazhenov Project, commented: “Paleozoic deposits have never been considered a target for geological prospecting. Deposits in sediments of this age have, mainly, been found opportunistically, while exploring other oil- and gas-bearing formations. Realising the need for an integrated approach, we have put together a research programme directed at engaging the scientific community of the Tomsk region, and have, already, completed the drilling of the first exploratory well”.