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Gazprom Neft Selects Technologies for Working with a New Class of Deposits

Source: 3/2/2017, Location: Asia

Gazprom Neft has developed a programme for implementing new oil production technologies in carbonate and fractured reservoirs* — a category which includes more than 40 percent of the company’s recoverable reserves, or almost 600 million tonnes of hydrocarbons. The project is being implemented as part of the company’s Technology Strategy.

Approximately 40 percent of the remaining reserves throughout Gazprom Neft’s fields are located in carbonate reservoirs. The most significant assets containing such deposits include the eastern part of the Orenburg field, the Kuyumbinskoye and Chonsky fields in Eastern Siberia, the Badra project in Iraq, and the Prirazlomnoye field on the continental shelf of the Pechora Sea. In terms of global hydrocarbon reserves, carbonate reservoirs play an ever more significant role — the majority of new fields falling into precisely this category.

The features of carbonate reservoirs require high-level skills and competencies on the part of oil engineers, as well as the appropriate selection of technologies in order that development is as effective as possible. The new programme has been developed by the Gazprom Neft Joint Scientific and Research Centre, and includes 12 technological initiatives in geological prospecting, field development, well boring, and oil production. Implementation of these will lead to a better understanding of the “behaviour” of carbonate reservoirs under development and, subsequently, increase the efficiency of oil production from these. In particular, enhanced oil recovery (EOR) techniques for carbonate reservoirs are to be introduced at the Chonsky project in Eastern Siberia, the pores of which are often clogged with salt, meaning the oil cannot pass through. Selection of acid-fracturing technologies** is currently ongoing at the Kuyumbinskoye field, and technological solutions directed at identifying regimes for optimum well operation are in hand at the Orenburgskoye field.

Vadim Yakovlev, First Deputy CEO, Gazprom Neft, commented: “Gazprom Neft’s technological development means we can be confident in increasing production, and the efficiency thereof. But in order to maintain that momentum we must, today, develop those technologies we plan to use tomorrow. The complex geology of carbonate reservoirs has not, until recently, allowed us to ensure their full development; today, we are, already, working with part of our own complex reservoirs, and I have every confidence that, as a result of these new technologies, their share as a proportion of the company’s total production is going to grow”.

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