至今为止,油田上常用注入氮气使水泥起泡或在浆液中添加微球体的方法制造超低密度水泥浆。虽然,这两种技术已经成熟并得以沿用,但其各自的特点限定了它们只适用于特定的环境,没有一种能够在更广泛的领域得到应用。本文介绍一种超低密度水泥浆,可以明显降低井的注入费和维修费。 To date, ultra-low-density grouts have been commonly produced by injecting nitrogen into the oil field to froth the cement or adding microspheres to the slurry. Although these two technologies are mature and well-established, their respective characteristics limit their applicability to specific environments and none are applicable in a wider range of fields. This article describes an ultra-low density cement paste that can significantly reduce well injection and maintenance costs.