Operational efficiency improvement in horizontal wells though optimizing the design of multistage hydraulic fracturing at Priobskoye Northern territory

UDK: 622.276.66 СМ
DOI: 10.24887/0028-2448-2017-12-122-125
Key words: horizontal wells, multistage hydraulic fracturing, low productivity reservoirs, optimal number of stages of multistage hydraulic fracturing, proppant weight per well
Authors: A.M. Zorin, T.S. Usmanov, A.V. Kolonskikh, I.V. Fakhretdinov (RN-UfaNIPIneft LLC, RF, Ufa), I.V. Sudeyev (Rosneft Oil Company, RF, Moscow), A.A. Zernin (RN-Yuganskneftegas LLC, RF, Nefteyugansk)

Priobskoye oil field plays an important part in Rosneft Oil Company activities. The undoubted importance of the field to the Company is defined by three factors at least, each of them being fundamental: oil production volumes (both current and prospective); a unique amount of recoverable oil reserves (according to the Russian classification); the field development receives increased attention from the state (oil recovery efficiency, environmental safety).

The development of the edge parts of Nothern license area of Priobskoye field is complicated by low-permeable and heterogeneous reservoirs. Despite this, bringing a maximum volume of reserves into development as well as increasing the oil recovery factor remains one of the strategic objectives of Rosneft Oil Company. With the tight oil share growing, the profitability of developing such zones falls sharply. Besides searching for new technologies, the company pays much attention to optimizing the existing ones to improve the development performance of hard-to-recover oil deposits. The paper discusses an approach to the design optimization of multistage hydraulic fracturing in new horizontal wells. Methods of calculating the optimal number of multistage hydrofracturing stages as well as proppant injection are discussed in detail, and pilot test results are listed.

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