非均相复合驱数值模拟方法研究与应用

doi:10.11743/ogg20160419

Abstract

Abstract: Heterogeneous combination flooding is a new chemical flooding method for further enhancing oil recovery in post-polymer-flooding reservoirs,and its main components of displacing agents include branched preformed particle gel(B-PPG),polymer and surfactant.According to laboratory experiments,the physicochemical properties of B-PPG and its oil-displacing characteristics are obviously different from that of polymer.The traditional mathematics model and simulators for chemical flooding can not accurately describe the oil displacement mechanism of B-PPG.In order to figure out the mechanism of heterogeneous combination flooding,a concept of particle throughput factor was introduced based on laboratory experiment results.We described the discontinuous migration features of B-PPG particles,modified the mathematical representation of residual resistance coefficient,built a new mathematical model,and performed fast solution algorithm research and software realization.Numerical experiments showed that the mathematical model can satisfactorily describe the oil-displacing mechanism of B-PPG,fit laboratory experiment results,and show good performance in history matching and dynamic tracking in field application.

Key words: seepage characteristics, throughput factor, mathematical model, numerical simulation, heterogeneous combination flooding, enhanced oil recovery

CLC Number:

TE357

Cao Weidong, Dai Tao, Yu Jinbiao, Lu Tongchao, Cheng Aijie, Xi Kaihua. A numerical simulation method of heterogeneous combination flooding[J]. Oil & Gas Geology, 2016, 37(4): 606-611.

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A numerical simulation method of heterogeneous combination flooding

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