摘要
在裂缝性低渗透碳酸盐岩油藏,毛管自吸作用使润湿相进入喉道将原油从多孔基质岩块驱至裂缝,在油田开发中,采用脉冲注水方式和合理的开发参数能够有效的利用渗吸作用来改善该类油藏的水驱开发效果,有助于提高石油的采收率。本文通过大量的室内实验研究,分析碳酸盐岩岩芯自然渗吸规律和脉冲注水对注水驱油效果的影响,研究合理的注水参数。川中碳酸盐岩油藏基岩物性差,自然渗吸驱油效率低;脉冲注水比自然渗吸可提高驱油效率0.608～8.916个百分点,提高幅度与脉冲注水压力、注水周期和脉冲次数有关。研究成果对该类油藏合理注水开发方式具有参考作用。
The capillary imbibition action makes wetting phas.e access throat and displaces the crude oil to fractures from matrix blocks in low permeability fracturing carbonatite reservoir, it contributes to improve this kind reservoir development effect and enhance the recovery by using the pulse water flooding and reasonable technical parameters. This paper analyses the natural imbibitiom rule and the displacement effect of pulse water injection in core of carbonatite by a good number experiments, confirms the reasonable water injection parameters. The natural imbibition displacement efficiency lower because of the low permeability in Chuanzhong carbonatite reservoir, Compare the natural imbibition, the pulse water flooding can raise the displacement efficiency 0. 608-8. 916 percent, it depend on pulse pressure, cycle time and frequency of water injection. The results can provide theoretical and technical support for this kind of reservoir in reasonable water injection mode.
出处
《内蒙古石油化工》
CAS
2008年第2期1-3,共3页
Inner Mongolia Petrochemical Industry
基金
成都理工大学科研基金(编号:HS0011)资助
