低渗透轻质油油藏热采室内模拟实验研究

Laboratory simulation study on thermal recovery of low permeability light oil reservoir

针对大庆肇源油田低渗透轻质油油藏特征,采用该油藏油层岩心及原油进行了热采室内模拟实验研究。通过实验分析了热水驱、蒸汽驱对驱油效率的影响,并与常规水驱进行对比。实验结果表明,蒸汽驱开采方式优于热水驱,而热水驱又优于常规水驱;热水驱驱油效率随着注水温度的升高而增加;注汽速度过高将影响驱油效率,而蒸汽温度及干度对驱油效率的影响不明显。

Laboratory simulation study has been conducted for thermal recovery of low permeability light oil in Zhaoyuan oilfield of Daqing by using cores and oil from the reservoirs.Through experiments,oil displacement efficiencies of hot-water flooding and steam flooding have been analyzed and compared with conventional water flooding.The result shows that,steam flooding is more superior to hot-water flooding,and hot-water flooding is more superior than conventional water flooding;oil displacement efficiency of hot-water flooding increases with the rising of water injection temperature;excessively high steam injection rate will affect oil displacement efficiency,while steam temperature and quality have no obvious impact on oil displacement efficiency.