Gazprom Neft begins pilot development of Achimov deposits


MOSCOW -- Gazpromneft-Yamal, a subsidiary of Gazprom Neft, has begun pilot oil production from the Achimov deposits at its Severo-Samburgskoye oil field (in the Purovsky District, Yamalo-Nenets Autonomous Okrug). A well drilled by the previous license holder, Gazprom Dobycha Urengoy, has been recommissioned and tested at the block. Flow production at the well is far in excess of planned performance, standing at 120 tonnes per day.

Photo: Gazprom.

Seismic investigations will also be undertaken as part of pilot works at the Severo-Samburgskoye licence block, the results of which should allow total oil reserves to be clarified by the end of 2017, and priority areas for drilling determined. Re-testing of a further exploratory well is planned for winter 2017-2018, allowing more detailed information on the field’s potential to be obtained, as well as drilling of several horizontal wells for multi-stage fracing of the strata, allowing the optimum development strategy for this asset to be identified.

Initial reserves in place at Severo-Samburgskoye field’s Achimov deposits are estimated to be in the order of 426 million tonnes of oil, with recoverable reserves during the first stage of development, moreover, estimated at 72 million.

The decision to designate the Achimov deposits an independent exploration prospect, and to commence implementation of the “Bolshaya Achimovka” project was taken by Gazrom Neft in 2016. Since that time, work has been undertaken on developing a local geological model of the Achimov deposits as part of a dedicated program to fine-tune drilling technologies and improve inflows in geologically complex strata; opportunities for expanding the company’s resource base are also under consideration.

Severo-Samburgskoye field occupies a key location in the northern cluster of Gazprom Neft’s project on development of the Achimov deposits. The potential of this cluster is estimated at four billion tonnes of hydrocarbons, in terms of initial reserves in place. Development of the Achimov deposits is complicated by poor reservoir quality i.e., low permeability and porosity, with high reservoir compmentalization, abnormally pressured zones, and high gas content. Gazprom Neft is in the process of selecting technologies for the effective development of these reserves as part of its Bolshaya Achimovka project.

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