Steam Injection in Oil Reservoirs With Bottom Water Zone

A. Bagci
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引用次数: 3

Abstract

3-D scaled model was used to study the performance of steam injection in reservoirs having a bottom water zone with the application of different well configurations. 3-D laboratory model was designed to represent ¼th of a 5-spot pattern in the B. Kozluca field in Turkey. Four experiments were conducted with the rectangular model with or without bottom water zone. The well configurations were changed during the course of experiments to determine their effects on oil recovery. Bottom water thicknesses were changed to see the effetcs on oil recovery. The physical properties of crushed limestone and crude oil mixture were kept constant during the experiments. Steam was injected through a vertical injection well in the model. Strings of thermocouples were used to observe 3-D temperature distribution. The maximum oil recovery was obtained by placing the horizontal producer along the diagonal of the rectangular model. Vertical injection-horizontal production well configuration provided better oil recovery than other well configuration even in the presence of a bottom water zone. Oil recoveries decreased with an increase in the thickness of the bottom water zone. Steam-oil ratio (SOR) increased in the presence of bottom water zone.
底水层油藏注汽研究
采用三维比例模型,研究了底水油藏在不同井型下的注汽效果。三维实验室模型被设计为代表土耳其B. Kozluca油田5点模式的四分之一。采用带底水区和不带底水区的矩形模型进行了4次试验。在实验过程中,改变了井的配置,以确定它们对采收率的影响。改变底水厚度,观察对采收率的影响。在实验过程中,粉碎后的石灰石与原油混合物的物理性质保持不变。该模型通过一口垂直注水井注入蒸汽。采用热电偶串来观察三维温度分布。通过沿矩形模型的对角线放置卧式采油器,可以获得最大的采收率。即使在存在底水层的情况下,垂直注入-水平生产井配置也比其他井配置具有更好的采收率。随着底水层厚度的增加,采收率降低。底水层存在时,蒸汽油比(SOR)增大。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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