Unstableformation was often met in drilling engineering.
工程施工钻孔中，经常遇到不稳定地层。
2
Fines migration may result from an unconsolidated or inherently unstableformation, or from use of an incompatible treatment fluid that liberates fine particles.
细粒运移可由非胶结的或固有不稳定的地层所引起，或者由使用可释放细小颗粒的不配伍处理液所造成。
3
This might lead to the formation of hydrates, which could be unstable if disturbed, and it might also lead to a lake of CO2 on the ocean floor which would be acidic at the margins.