川深1井超深小间隙尾管防窜固井胶乳水泥浆技术.

Chuanshen 1 well, which is an ultra-deep prospecting well, has five-spud section drilled with the depth of 8 120 m. The fifth spud liner cementing confronted hash conditions such as ultrahigh temperature, ultra-high pressure, small annular space, great risk of gas channeling etc. Besides, the request of long term integrity and pack-off capability is higher for the cement sheath during production stage. A system of elastic anti-gas migration latex slurry is established in accordance,with the research of relationship between compressive strength of cement stone and dosage, particle size of silica sand, and with the research of influence on mechanic property by function material. The cement slurry system has stable performance, API Water loss is 18 mL, anti-channel coefficient SPN is 0. 89 elasticity, modulus is ·1. 8 GPa, permeability is 0.10 X 10³ μm², high-temperature settling stability is 0.01 g/cm³, and the compressive strength of 2,1 h is 16. 3 MPa. The cement system is successfully applied in super-deep small annular space liner cementing of Chuanshen 1 well combined with other technological measures, the cementing quality is excellent. [ABSTRACT FROM AUTHOR]