针对油层非均质性强、孔径分布范围较宽、油层孔径难以准确预知,常规屏蔽暂堵技术几乎无法实现对整个油层井段的保护、油层保护效果差等特点,设计了广谱"油膜"暂堵型保护油层钻井完井液体系,并进行了室内系统评价和现场应用. 结果表明,当广谱"油膜"暂堵剂GPJ的加量达到3%时,可在近井壁处形成很好的屏蔽暂堵"油膜"带,渗透率堵塞率和恢复率皆大于90%,与常规屏蔽暂堵技术相比,可使油层损害程度降低7.4～10倍,产量提高1.82～2.96倍,而且与油层渗透率和温度无关.
参考文献
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