华北地区别古庄油田湖相滩砂储层沉积特征及其油水运动规律

THE SEDIMENTARY FEATURES OF THE LAKE PHASES RESERVOIR OF BIEGUZHUANG OIL FIELD IN HUABEI AREA AND THE MOVEMENT OF OIL AND WATER IN THE RESERVOIR ROCK

本文以华北地区的别古庄油田为例,从区域沉积背景,油田所处自然地理位置及沙四上的岩性组合、沉积构造、粒度特征和岩矿古生物诸方面,介绍了湖相油田的沉积特征和近岸滩砂、远岸滩砂两种主要砂体类型的层内非均质性。在此基础上初步探讨了湖相砂体在油田注水开发中,油水在平面上的运动规律和纵向上的水洗特征,为油田后期调整、挖潜,改善开发效果提供地质依据。

Taking Bieguzhuang oil field as an example,this paper gives a description on the characteristics of the lacustrine petroleum reservoir based on the backgr- ound of the regional sedimentation,its geographical location,lithological combi- nation,deposition and geotectonics,characteristics of the grain size distribution, mineral composition and paleobioiogy.The in-layer heterogeneity in near-shore and off-shore sand bodies are presented.On such a basis the horizontal move- ment of oil and water in the reservoir rocks in water flooding are discussed preliminarily.The characteristics of oil displacement by water in a vertical pro- file is discussed also.These will give a geological base in the design of adju- stment program to improve the oil field development results.