UDC

550.8.023

Authors

Yur’’ev Aleksandr Vyacheslavovich
Institute of Oil and Gas, Northern (Arctic) Federal University named after M.V. Lomonosov (Arkhangelsk, Russia)
e-mail: a.yurjev@narfu.ru
Shulev Vyacheslav Evgen’evich
Institute of Oil and Gas, Northern (Arctic) Federal University named after M.V. Lomonosov (Arkhangelsk, Russia)
e-mail: v.shulev@narfu.ru

Abstract

Laboratory studies of rock samples composing productive reservoirs have an important role in the reservoir and production engineering. Qualitative investigations can reduce the risks in the initial stages and predict the extent and rate of hydrocarbon production. The paper discusses the methodology and results of the determination of water-oil displacement efficiency on the whole core samples caught in the fields of Western Siberian oil and gas province. Determination of water-oil displacement efficiency is very important since a displacement factor is directly related to oil content and essential to the formation evaluation and determination of the oil recovery factor. The studies of reservoir parameters were carried out on the whole core samples, which are the most representative models of the field and reduce the risk of mistake because of the immensity influence and the presence of heterogeneities in the rock volume. To exclude the anisotropy the core samples of smaller diameter sawed parallel to bedding were studied. As a result of the studies of core samples of two deposits undertook at the modern laboratory equipment we have come to the conclusion about the regular changes of water-oil displacement efficiency and SORW in relation to the reservoir parameters of reservoir rocks. In addition, the similarity of the graphical charts of water-oil displacement on the samples of different sizes allows deducing an inference about the samples homogeneity and strongly marked anisotropy absence. The research result monitoring is a distinguishing feature of this paper and can be used in the future as one of the ways of the objectivity control procedure of research results, especially in cases of alleged high anisotropy. The data obtained as part of the study will be used in the reserve calculation and reservoir and production engineering.

Keywords

water-oil displacement, Western Siberia, whole core, reservoir parameters

References

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