目前国内致密油储层岩心洗油技术普遍存在洗油周期长、洗油质量不能保证的问题，为此通过实验寻找更适合致密油岩心洗油的抽水溶剂、洗油溶剂及洗油方法。结果表明：针对致密油岩心应适当延长抽水时间，二甲苯可作为抽水溶剂，因其具有高沸点的特点抽水效果较好；酒精+苯+氯仿（体积比为1: 2 : 2）混合溶剂浸出液含油率高（14%），可优选为致密油岩心洗油溶剂；加压饱和溶剂法和二氧化碳加压法在7～8 次（14～16 d）洗油后，洗油溶剂的荧光级别均小于3 级，而且岩心质量、孔隙度和渗透率均趋于稳定，达到标准SY/T 5336 —2006 要求，该方法较为适合准噶尔盆地致密油岩心洗油，具有推广价值。

In order to resolve the existing problems of long cycle and poor quality of washing oil for cores from tight reservoirs, a variety of pumping solvents, washing oil solvents and different methods to remove oil from tight cores were studied experimentally. The results show that dimethylbenzene is an excellent water extraction solvent due to its high boiling point, while the mixture of alcohol, benzene and chloroform with the ratio of 1∶2∶2 performed outstandingly good in the extraction of oil from tight cores because of high oil percentage of its leach liquor （14%）. The fluorescence level is less than three and the quality, porosity and permeability are steady after 7-8 circles （16 days） with pressurized saturated solvent method and CO2 pressure method. The effect met the standard of SY/T 5336－2006. This method isproved to be suitable for washing oil from tight cores in Junggar Basin.