Quantitative Characterization of Sand Body Connectivity in Deepwater Turbidite Channel Reservoir

doi:10.11885/j.issn.1674-5086.2020.08.19.02

Abstract

Abstract: In the development practice of deep-water oilfield, it is found that the composite channel sand body as a development unit bears overall pan-connectivity because of its high sand-ground ratio and good reservoir quality, but there are differences in connectivity in different positions. In order to accurately and finely depict the connectivity of different positions in the channel sand body, and improve the injection-production efficiency and development effect, the reservoir sandbodies are subdivided into configuration units and configuration interfaces by using the method of configuration. The impact of the fine characteristics of gravity flow sedimentary outcrop in the west Qinling Area on connectivity is quantitatively described, and geological model is used to applied it to the development and production. It is found that for turbidite channel reservoirs with high NTG, both channel configuration unit and channel configuration interface affect connectivity at the same time, and generally configuration interface is dominant, the influence of sand body characteristics on connectivity can be described by "configuration unit-interface binary modeling method", the connectivity between sand bodies can be quantitatively described and measured by "connectivity coefficient". The "equivalent substitution" method can be used to calculate the connectivity coefficient.

Key words: deepwater oilfield, turbidite channel, configuration interface, quantitative characterization, connectivity coefficient, outcrop of West Qinling Area

CLC Number:

TE122

LI Chenxi, KANG Botao, ZHANG Xu, GAO Yihua, CHEN Guoning. Quantitative Characterization of Sand Body Connectivity in Deepwater Turbidite Channel Reservoir[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2022, 44(6): 10-20.

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URL: http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.11885/j.issn.1674-5086.2020.08.19.02

http://journal15.magtechjournal.com/Jwk_xnzk/EN/Y2022/V44/I6/10

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