2017年10月第36卷第5期
大庆石油地质与开发
Petroleum Geology and Oilfield Development in Daqing
D0I:10.19597/J.ISSN.1000-3754.201706005
延长油田坪北区长8储层孔隙结构特征
及其对水驱油微观特征的影响
周俊杰
（中国石油集团长城钻探工程有限公司，辽宁盘锦
124010
Oet.，2017 Vol. 36 No. 5
摘要：储层孔隙结构对水驱油特征有重大影响。以延长油田坪北区长8储层为例，综合利用岩心、铸体薄片、扫描电镜、压汞实验等资料对储层孔隙结构进行分析，通过真实砂岩微观模型实验，探讨了不同孔隙结构对水驱油效率的影响。研究表明：长8储层主要岩性为细粒长石砂岩和细粒岩屑长石砂岩，主要孔隙类型为残余粒间孔隙（原生孔隙）、溶蚀粒间和粒内孔隙（次生孔隙）；储层类型可分为I类、Ⅱ类、Ⅱ类和IV类，I、Ⅱ类为主要储层；水驱油驱替类型以均勾驱替、网状均匀驱替、指状网状驱替以及指状驱替为主，储层物性、孔喉特征对驱油效率有重要影响，I、ⅡI类储层驱油效率高达50%。明确孔隙结构与驱油效率关系可更好地指导油气合理开发。
关键词：孔隙结构；驱油效率；储层物性；孔喉；坪北区；长8
中图分类号：TE122.2
文献标识码：A
文章编号：1000-3754（2017）05-0068-08
CHARACTERISTICSOFTHEPORE-THROATSTRUCTURESANDTHEIR
INFLUENCESONTHEWATERFLOODEDOILMICRO-FEATURES
FORCHANG8RESERVOIRINPINGBEIBLOCKOF
YANCHANGOILFIELD
ZHOU Junjie
(Great Wall Drilling Company of PetroChina, Panjin 124010, China
Abstract: The structures of the pore and throat possess important influences on the characteristics of the water-flooded oil, taking Chang 8 reservoir in Pingbei Block of Yanchang Oilfield as example, comprehensively integrated with the core, cast thin sheet, scanning electron microscope mercury injection experimental data and so on, the structures were figured out, and moreover through the micro-model experiment of real sandstones, the influences of different pore structures on the waterflooded oil efficiency were explored. The study shows that Chang 8 reservoir is mainly composed of the fine-grained feldspar sandstone and fine-grained lithic feldspar sandstone, the principal pore type, are shown as follows: residual intergranular pore (primary pore), dissolved intergranular and intragran-ular pore ( the secondary pore) ; the reservoir types can be classified into Class I , II , II and IV, Class I and II are the main reservoirs; the waterflooded oil kinds are generally divided into uniform displacement, reticular uni
收稿日期：2017-06-02
改回日期：2017-08-15
基金项目：国家科技重大专项“鄂尔多斯盆地大型低渗透岩性地层油气藏开发示范工程”（2011ZX05044)。作者简介：周俊杰，男，1981年生，工程师，从事油气田开发研究和技术管理工作。
E-mail: zhoujunjie_8104@ 163, com
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