多重酸化对储层的伤害机理研究

Study on the Damage Mechanism of Multiple Acidification to Reservoirs

重复酸化技术是油层改造常用的技术之一,利用不同的酸去溶蚀岩石孔隙中的堵塞物,从而改善岩石内部孔道的连通性,解除地层污染,从而提高采收率。以绥中36-1油田为例,进行土酸和氟硼酸对岩心伤害实验,然后对伤害实验之后的岩心的渗透率分析,得出对储层造成的伤害机理,从而更好地采取相应的措施进行处理。

Repeat acidizing technology is one of the common reservoir reconstruction technologies, it uses different acids to dissolve the blockage in the pores of rock, improving the hole connectivity inside the rock, removing formation pollution, so as to improve the recovery. In this paper, taking Suizhong 36-1 oilfield as an example, the core damage experiments of niobium hydroxide and fluoroboric acid were carried out. Then the damage mechanism of the reservoir was obtained by analyzing the permeability of core after the damage experiments.