Characteristics of Interlayer in the B Oilfield in South China Sea and Their Effect on Remaining Oil Distribution

doi:10.11885/j.issn.1674-5086.2020.06.19.02

Abstract

Abstract: In order to effectively guide tapping of the remaining oil at high water cut stage, we carry out research the origin and distribution of interlayer, and its influence on the distribution of remaining oil, using core, seismic, logging, and dynamic production data. The results show that the interlayer could be divided into three types: muddy interlayers, calcareous interlayers and physical interlayers, which is standard of logging recognition. In plane direction, interlayers could be divided into three types as well: scattered development, local continuous development, comprehensive development, which is planar classification criteria various types of interlayer. In vertical direction, single type interlayer developed in homogeneous reservoir, and composite interlayer developed in heterogeneous reservoir. We also analyze the influence of different types of interlayer on the distribution of remaining oil, and find that the remaining oil relatively enriched in the lower part of the local continuous developed and comprehensive developed interlayers, which are important direction of tapping potential in the later stage of oilfield development.

Key words: Pearl River Mouth Basin, delta facies, interlayer, distribution pattern, remaining oil distribution

CLC Number:

TE112

XUE Cheng, XIONG Shuquan, REN Fei, HOU Kai, LI Fan. Characteristics of Interlayer in the B Oilfield in South China Sea and Their Effect on Remaining Oil Distribution[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2022, 44(5): 14-22.

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