南海B油田夹层特征及其对剩余油分布影响

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

薛成 熊书权 任飞 侯凯 李凡

XUE Cheng XIONG Shuquan REN Fei HOU Kai LI Fan

中海石油(中国)有限公司深圳分公司, 广东 深圳 518067

CNOOC China Limited, Shenzhen Branch, Shenzhen, Guangdong 518067, China

为有效指导油田高含水阶段剩余油挖潜，综合运用岩芯、测井、地震和生产动态等资料，开展夹层成因与展布特征研究，及其对剩余油分布影响研究。结果表明，油田夹层可分为泥质夹层、钙质夹层和物性夹层3种类型，建立了夹层测井识别标准；平面上夹层可分为零星发育式、局部连片发育式和全区发育式3种类型，建立了各类型夹层平面分布标准；垂向上均质储层内部多发育单一类型夹层，非均质性较强储层内部多发育复合类型夹层；并分析了不同类型夹层对剩余油分布影响，其中，局部连片夹层和全区发育夹层下部剩余油相对富集，是油田开发后期挖潜重要方向。

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.

10.11885/j.issn.1674-5086.2020.06.19.02