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Nanometer film structured reservoir protecting agent, drilling fluid containing the same and use thereof in low-permeability reservoirs
Nanometer film structured reservoir protecting agent, drilling fluid containing the same and use thereof in low-permeability reservoirs
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机译:纳米膜结构储层保护剂,包含该保护剂的钻井液及其在低渗储层中的用途
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摘要
The present invention relates to the petroleum drilling field and discloses a nanometer film structured reservoir protecting agent, a drilling fluid containing the same and use thereof in low-permeability reservoirs. The structured nanometer film reservoir protecting agent comprises montmorillonite laminas, structural units represented by formula (1) and structural units represented by formula (2),; wherein each of R1, R2, R3, R4 and R5 is independently selected from H, C1-C4 alkyl and C1-C4 alkoxy, R6 is alkylene of C1-C6. The drilling fluid containing the structured nanometer film reservoir protecting agent of the present invention exhibits favorable rheology property, temperature-tolerant property, anti-collapse property and reservoir protection property when used for drilling in low-permeability reservoirs.展开▼