吴起油田长8储层敏感性评价

Study on the characteristics of Chang 8 reservoir in Wuqi Oilfield and its controlling factors

为了高效开发吴起县地区超低渗储层,应用岩心动态流动实验对吴起油田长8储层砂岩进行了储层敏感性评价,结果表明,该储层具有弱水敏、弱速敏、弱盐敏、中等偏强压敏和极强酸敏的特点。针对储层敏感性问题,可采取压裂、酸化改造等措施使其增产,尤其对于该储层低渗的特点,通过注入酸液溶解岩石的某些基质,可以使地层渗透率提高,从而达到提高采收率的目的。

In order to develop the ultra-low permeability reservoir in wuqi oilfield efficiently,the sensitivity of sandstone reservoir in chang8 reservoir of wuqi oilfield was evaluated by core dynamic flow experiment.In view of the sensitivity of the reservoir,measures such as fracturing and acidizing transformation can be taken to increase the production.Especially for the low permeability of the reservoir,the permeability of the formation can be increased by injecting some matrix of the rock dissolved by acid solution,so as to achieve the purpose of enhancing the recovery factor.