摘要
为了研究稠油油藏蒸汽吞吐后转蒸汽驱驱油效果及影响因素,分析蒸汽吞吐后转蒸汽驱提高稠油油藏采收率的潜力及有效开发方式,以胜利油区孤岛油田中二北稠油油藏蒸汽吞吐后密闭取心岩心为实验对象,开展了在原始油水饱和度状态下的驱替实验,对不同驱替介质、不同介质温度及不同驱替方式下的剩余油驱油效率进行了研究。结果表明:驱替介质类型、介质温度及驱替方式是影响转驱效果的主要因素,相同温度下蒸汽驱的驱油效率要好于热水驱,250℃蒸汽驱比同温度热水驱可提高采收率5%以上,驱替介质温度与采收率提高幅度之间存在良好的对数关系,研究区块蒸汽吞吐后直接转蒸汽驱可提高采收率30%左右。
In order for the study on influence factors of oil displacement efficiency after steam stimulation in heavy oil reservoir,and analysis of potential and effective development modes of enhanced oil recovery of heavy oil reservoir after steam stimulation,the sealed core of the Gudao heavy oil reservoir after steam stimulation is adopted to study the displacement efficiency experiments under the original oil/water saturation,for the research of oil displacement efficiency under different displacement media,different media temperature and displacement style.The result demonstrates that displacing medium types and the displacing method are the main factors affecting the displacement efficiency,the steam flooding is better than water flooding under the same temperature.The steam flooding can enhanced the recovery rate by 5% more than the hot water flooding under the same temperature of 250 ℃.Our research also shows a good log relationship existing between the temperature of the displacing medium and the increasing rate of the final recovery efficiency,the study block with steam flooding can enhance the oil recovery rate by about 30% than that of steam stimulation.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2011年第1期48-50,114,共3页
Petroleum Geology and Recovery Efficiency
基金
中国石化重大先导项目"孤岛中二北Ng5高含水期化学蒸汽驱先导试验项目"(YKS1002)
关键词
普通稠油
剩余油
驱油效率
驱替方式
蒸汽吞吐
驱替介质
蒸汽驱
ordinary heavy
remaining oil
oil displacement efficiency
displacement style
steam soak
displacement medium
steam displacement
