P. Yu. Dobrokhleb, T. B. Soroka, A.V. Gusev
NEW SOLUTIONS – NEW OPPORTUNITIES: TECHNOLOGY OF DRILLING WITH ADJUSTABLE PRESSURE AS AN EFFECTIVE SOLUTION FOR FRACTURED RESERVOIRS OF EASTERN SIBERIA
Annotation. The oilfields in Eastern Siberia the most part of oil and gas reserves are contained in Riphean high fractured carbonate reservoir. This reservoir contained a lot of secondary interstices and caverns, that are tend to enlarge due to excessive pressure exerted, that leads to loss circulation, differential sticking and associated NPT. In case of conventional drilling on the Eastern Siberia oilfields, such problems don’t allow to reach the project depth in horizontal sections 152.5 mm (6in) – 1 000 m. The most popular method of struggling loss circulation is using loss circulation materials (LCM), which dramatically affects reservoir production properties. Furthermore, effectiveness of LCM wasn’t enough, because volume of lost drilling fluid, which is oil based mud, remained too high. Managed Pressure Drilling technique was applied for resolving problems while drilling horizontal section in oilfield that allowed to reach the TD. Compare to conventionally drilled wells, using of MPD in the Eastern Siberia oilfields resulted in reducing mud losses up to 3 – 5 times, reducing 152.4 mm section drilling time by 20% and increasing well production by 65 – 180% This article discusses the stages of the project, a comparative analysis of the traditional method of drilling and MDD.
Keywords: equivalent circulation density, traditional method of drilling, drilling with pressure regulation, optimization of the well construction process.
For citation: Dobrokhleb P. Yu., Soroka T. B., Gusev A.V. [New solutions – new opportunities: technology of drilling with adjustable pressure as an effective solution for fractured reservoirs of eastern Siberia]. Upravleniye tekhnosferoy, 2019, vol. 2, issue 2. (In Russ) Available at: f-ing.udsu.ru/technosphere
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About the Authors
Dobrokhleb Pavel Yurievich
Engineer, LLC "Schlumberger Technology company»
125171, Moscow, Leningrad highway, 16 а, p. 3
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Soroka Taras Bogdanovich
Engineer, LLC "Schlumberger Technology company»
125171, Moscow, Leningrad highway, 16 а, p. 3
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Gusev Anton Vitalievich
Master's degree student, Udmurt state University
426034, University str., 1/7, Izhevsk, Russia
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