油层微构造研究及其应用

The Study and Application of Oil-bearing Reservoir Mini-structure

朱红涛 胡小强 张新科 陈峰

ZHU Hong-tao HU Xiao-qiang ZHANG Xin-ke CHEN Feng

中国地质大学 资源学院 石油系, 湖北 武汉 430074; 中原油田 采油三厂, 河南 濮阳 457000

Department of Petroleum, Institute of Resource, China University of Geosciences, Wuhan Hubei 430074; First Oil Production Factory, Zhongyuan Oilfied, Puyang Henan 457000

油层微型构造(微构造)是指在总的油田构造背景上,油层本身的微细起伏变化所显示的构造特征,其幅度和范围均很小,通常相对高差在10m以内,面积很少超过0.3km2。它可以分为正向微构造和负向微构造。正向微构造,一般为剩余油富集区;负向微构造,为低含油气或易水淹区。经过对垦西油田实践证明,凡正微区的生产井效果好,负微区生产井效果差。在确定加密井井位时,应结合微构造因素,尽可能地把加密井钻在正向微构造区,负向微构造区只宜布注水井。

Mini-structure is small highs and lows exhibited on its overall background, with a height difference of less than 10m and covering an area of less than 0.3km 2 generally. These structures include positive mini-structures and negative mini-structures. The former ones are regions of oil and gas enrichment and the later ones are regions where severe water invasion occurs. According to developmental practice in Kenxi Oilfield, wells located on the positive mini-structures are better than those on negative mini-structures. In the designing of well locations, according to mini-structure, infull wells should be drilled on the positive structure areas and only injection wells are drilled in the negative mini-structure areas.