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发明公开
CN105801783A 改性的二氧化硅纳米颗粒及其制备方法和适合页岩气井的钻井液 有权

改性的二氧化硅纳米颗粒及其制备方法和适合页岩气井的钻井液
摘要：
本发明涉及石油钻井液领域，公开了一种改性的二氧化硅纳米颗粒，所述改性的二氧化硅纳米颗粒上的改性基团包括改性聚合物链，所述改性聚合物链中的结构单元由下式(1)所示结构的单体中的一种或多种以及式(2)所示结构的单体中的一种或多种提供。本发明还提供了一种改性的二氧化硅纳米颗粒的制备方法及其制得的改性的二氧化硅纳米颗粒。本发明还提供了一种含有上述改性的二氧化硅纳米颗粒作为封堵剂的适合页岩气井的钻井液。本发明通过采用所述改性的二氧化硅纳米颗粒，能够使得所述改性的二氧化硅纳米颗粒在钻井液中作为封堵剂时，不易团聚成大颗粒，且能够获得较好的封堵效果。
摘要（英）：

The invention relates to the field of oil drilling fluids and discloses modified silica nanoparticles. The modified group on the modified silica nanoparticles comprises a modified polymer chain; and the structural unit in the modified polymer chain is provided by one or more of monomers in the structure shown in the formula (1) and one or more of the monomers in the structure shown in the formula (2). The invention further provides a preparation method of the modified silica nanoparticles and the modified silica nanoparticles prepared by the preparation method. The invention further provides a drilling fluid containing the modified silica nanoparticles as a blocking agent suitable for a shale gas well. By modified modified silica nanoparticles, when the modified silica nanoparticles are used as the blocking agent in the drilling fluid, large particles are not easily agglomerated; a relatively good blocking effect can be obtained; the formula (1) and the formula (2) are as shown in the specification.

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