混相压力调节剂提高CO_2驱采收率室内研究  

Experimental Study of Miscible Pressure Modulator to Improve the CO_2 Flooding Recovery Efficiency

作　　者：齐桂雪 李华斌[1] 谭肖 杨翠萍 

机构地区：[1]成都理工大学能源学院油气藏地质及开发工程国家重点实验室(成都理工大学),成都610059 [2]中石化中原油田石油工程院,濮阳457001

出　　处：《科学技术与工程》2016年第24期167-170,共4页Science Technology and Engineering

基　　金：中原高压低渗油藏降低CO_2驱混相压力调节体系效果评价(31300028-14-FW1701-0071)资助

摘　　要：中原油田部分区块属于高压低渗透油藏,油层温度高、矿化度高、注入压力过高、注水开发困难。为改善CO_2气驱开发效果,达到混相驱替,选取混相压力调节剂降低最小混相压力。实验测试不同浓度调节剂降低最小混相压力的效果,优选出混相压力调节剂浓度为0.3%(质量浓度),最佳调节剂注入段塞为0.1孔隙体积,最佳注入方式为(当总注入量)大段塞注入。结果表明,混相压力调节剂能明显改善气驱开发效果,为提高类似油藏气驱采收率提供依据。Some high-pressure ＆ low-permeability blocks of Zhongyuan oilfield have the following characteristics： high pressure,high temperature,high salinity,and low permeability. The layer injection pressure is too high to water injection. In order to promote the recovery efficiency of CO2 flooding to achieve miscible displacement,it selects miscible modulator to reduce the minimum miscible pressure. Using experimental method to test the effect of different concentration and different slug of modulator to reduce the minimum miscible pressure,optimizing the appropriate miscible modulator concentration is 0. 3%（ mass concentration）,and the optimal modulator injection slug is 0. 1 pore volume. At the same time,we get the conclusion that the best injection way is long slug injection,when the injection slug is the same. The results show that the miscible modulator can significantly improve recovery efficiency of gas flooding. It has important guiding significance for the similar reservoir development.

关 键 词：CO2混相驱 最小混相压力 界面张力 混相调节剂 段塞优化 

分 类 号：TE357.45[石油与天然气工程—油气田开发工程]