面120区稠油热采增产试验效果分析

八面河油田面120区储层渗透率较低,油层原油粘度较大,出现了热采效果差,地层能量下降快的现象。针对这种情况可采用氮气+蒸汽吞吐技术。实践表明,该项技术的应用提高了井筒隔热效果,降低了热损失,同时又补充了能量,调整了吸汽剖面。需要强调的是在热采过程中,对油层的保护可采用伴蒸汽注入,但这种方法容易造成地层伤害。因此,在采用伴蒸汽方式时,注入防膨效果最佳。

Analysis on the Effect of Production Increase Test by Thermal Production of Viscous Oil in M120 Well

In order to improve the effect on the development of heavy oil well and prevent energy of the reservoir from decreasing in M120,nitrogen &steam soak technology should be adopted.Application of this technology can enhance heat insulation effect of wellbore,decrease thermal lost,supplement energy and adjust vapor-sucking section.One method should be underlined that steam-injection can be adopted to protect oil reservoir.However,it will do harm to formation.As a result,antiswelling agent should be added while adopting steam method.