CAJ | 학술논문

管线输运与油藏流动系统构成了一个耦合系统，为此，提出了聚驱条件下耦合求解管线流动及油藏流动的数学模型及相应的解耦算法。采用的Drift-flux模型可有效描述管线中各相流体的流动状态及过程，同时考虑了聚合物溶液对水相增黏的影响；采用广义达西定律描述油藏流动。计算过程中，两者通过交换边界条件（井筒压力、射孔段各相流量及聚合物浓度）完成该管线-油藏系统的解耦求解过程，有效解决了耦合求解收敛性较差的问题。通过商业软件验证了该数学模型的正确性。解耦计算结果表明，Drift-flux模型可有效描述管线内聚驱条件下的各相流体的流动状态及过程；解耦算法可以有效地求解管线-油藏的耦合流动过程，计算误差与耦合求解算法相比小于5%，计算速度则比耦合求解算法快1～2个数量级。
관선수운여유장류동계통구성료일개우합계통，위차，제출료취구조건하우합구해관선류동급유장류동적수학모형급상응적해우산법。채용적Drift-flux모형가유효묘술관선중각상류체적류동상태급과정，동시고필료취합물용액대수상증점적영향；채용엄의체서정률묘술유장류동。계산과정중，량자통과교환변계조건（정통압력、사공단각상류량급취합물농도）완성해관선-유장계통적해우구해과정，유효해결료우합구해수렴성교차적문제。통과상업연건험증료해수학모형적정학성。해우계산결과표명，Drift-flux모형가유효묘술관선내취구조건하적각상류체적류동상태급과정；해우산법가이유효지구해관선-유장적우합류동과정，계산오차여우합구해산법상비소우5%，계산속도칙비우합구해산법쾌1～2개수량급。
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.