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Experience in the Study of Core from A Horizontal Well Borehole Drilled in the Sands of the Vendian East Siberia
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Horizontal Wells 2019 Challenges and Opportunities, May 2019, Volume 2019, p.1 - 6
Abstract
The object of research in this work is the core of two horizontal wells, first drilled by an oil company on the territory of the Mirny ledge in the north-eastern part of the Nepa-Botuobinsky anteclise. The core characterizes terrigenous sediments of the Buk suite of the Tyr horizon of the upper Vendian. Such formations are characteristic of delta complexes, in which low-density prodeltovy clay deposits form diapirs in overlying sandy sediments. In the vertical wells of the license area, such formations have not been previously diagnosed, although they can be very important in geological and hydrodynamic modeling of the reservoir and its development. Thus, the forecast of exploratory and production drilling should be based on a reliable geological and geophysical model of the target object. To achieve this, it is necessary to have a spatial understanding of the structure of the tank and the change in its filtration-capacitive lateral. Studying the core from the horizontal wellbore and the subsequent correct use of the results of such studies will help to determine these objectives, which will allow the Company to reduce geological and economic risks.