The boundary and initial condition, such as the inlet of the primary fluid and the secondaryfluid, the outlet of the injector are given, and make the relevant numerical disposal.
The driving force of primary migration is mainly abnormal high pressure and that of secondary migration is buoyance and fluid potential difference.
初次运移的动力主要是异常高压，二次运移的动力主要是浮力和流体势差。
3
The pickling process removes materials that may react with the main treatment fluid to create undesirable secondary reactions or precipitates damaging to the near-wellbore reservoir formation.