缝洞型碳酸盐岩油藏自流注水流动耦合计算模型及应用

A mathematical model for dump-flood water injection in fractured-cavity carbonate reservoirs

随着常规油气资源的衰竭,非常规资源的地位日益突出,碳酸盐岩油藏便是典型之一。我国新疆塔里木油田很多碳酸盐岩油藏属于缝洞型储层,其中一部分具有典型溶洞型特征,为了解决能量补给所需水源问题,这类开发井可以采用自流注水技术。本文对自流注水过程进行节点流态分析,通过计算机编程将各节点流动方程联立耦合起来,获得自流注水系统耦合计算数学模型。利用该模型对油田实例进行了模拟计算,结果显示效果良好。

With the depletion of conventional oil and gas resources, the status of unconventional resources has become increasingly prominent, and carbonate reservoirs are one of the typical ones. Many carbonate reservoirs in the Tarim oilfield in Xinjiang, China, are fracture-cavity reservoirs, some of which are characteristic of typical cave. In order to solve the water supply problem of energy replenishment, dump-flood water injection can be applied in those areas. In this paper, the flow state analysis of each nodes along dump-flood water injection process is carried out, and the flow equations of each node are coupled together by computer programming to obtain the mathematical model of the coupling calculation of the self-flow water injection system. The model was used to simulate the oilfield and the results showed good results.