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由于水资源匮乏以及出于环境保护的考虑,国内油田已普遍采取油井产出水回注进行二次驱油,因此,回注技术在油田上运用很成熟。但国内对气田产出地层水的回注技术处于探索阶段,现场应用的比较少。本文根据新场气田的实际情况:既不存在着常压高渗透层、也未钻遇漏失量的层、而且目前也没有废弃层;提出了气田内局部低压低产的采空区为有利的回注目标层。经过现场试注试验,新蓬2井井区回注取得成功,表明致密砂岩气田地层水进行回注是可行的,为规模化回注提高了技术保障。
Due to the scarcity of water resources and environmental protection considerations, domestic oilfields have generally adopted oil well injection for secondary oil recovery. Therefore, the technology of injection recovery is very mature in oilfields. However, the injection technology of formation water produced by gas field in China is in an exploratory stage, and there are few field applications. According to the actual situation of Xinchang gas field, there is neither the normal pressure and high permeable layer nor the lost layer, and there is no abandoned layer at present. It is proposed that the goaf with local low pressure and low yield in the gas field is favorable Note Target level. After the field test, the successful injection of well in Xin Peng 2 well area shows that the injection of formation water in the tight sandstone gas field is feasible and the technical support for large-scale injection is improved.