关键词: 管流, 油藏流动, 耦合系统, 解耦算法, 聚合物驱

Abstract:

The pipe flow and reservoir fluid form a coupled system. Therefore，a mathematical model is proposed，which
is capable of solving pipeline flow system and reservoir fluidity system. In pipeline system，Drift-flux model has been used
to elucidate multiphases flow process with consideration of the influence of viscosity increasing of polymer solution. And
Darcy laws have been used to describe reservoir fluidity system. On the basis of that，the decoupled solution has been given，
the decoupled calculation has been completed by exchanging boundary conditions（wellbore pressure，multiphases flux and
polymer concentration on perforations）. As a result，the convergence difficulties of coupled solution have been improved
effectively. And the validity is verified by using business software. Results indicate that Drift-flux model can be effectively
used to study the multiphases flow in pipeline with polymer solution；and the decoupled solution can efficiently solve the
coupled flow process of pipeline and reservoir. Compared with the coupled solution，error is less than 5%. And the computing
speed is 10 to 100 times of the coupled solution.

Key words: pipe flow, reservoir fluid, coupled system, decouple solution, polymer flooding