引用本文: 乔继延, 鲁晓兵, 张旭辉. 裂隙影响基质渗流的数值模拟1)[J]. 力学与实践, 2021, 43(6): 879-886.
QIAO Jiyan, LU Xiaobing, ZHANG Xuhui. NUMERICAL SIMULATION OF THE INFLUENCE OF FRACTURES ON SEEPAGE IN MATRIX$^{1)}$[J]. MECHANICS IN ENGINEERING, 2021, 43(6): 879-886.
 Citation: QIAO Jiyan, LU Xiaobing, ZHANG Xuhui. NUMERICAL SIMULATION OF THE INFLUENCE OF FRACTURES ON SEEPAGE IN MATRIX$^{1)}$[J]. MECHANICS IN ENGINEERING, 2021, 43(6): 879-886.

## NUMERICAL SIMULATION OF THE INFLUENCE OF FRACTURES ON SEEPAGE IN MATRIX^1)

• 摘要: 建立含裂隙均匀基质中的稳态渗流模型,通过数值模拟得到渗流速度和压力分布,分析不同分布型式的平行和交叉裂隙对基质渗流的影响,并结合油气开采和驱替评价不同裂隙可能带来的后果。研究发现,在裂隙端部压力发生突变,相应的渗流速度也出现急剧变化;对于基质而言,裂隙入口端等同于汇,而开口端等同于源。平行对称分布的裂隙导致周围基质中流速降低,裂隙流量占截面流量的主要部分,而不对称分布的平行裂隙有利于基质中的流动。

Abstract: A steady state seepage model of fractures in homogeneous matrix is established and velocity and pressure distribution are obtained by numerical simulation. It is found that fractures cause source and confluence effects in matrix and thus the influence on matrix seepage by parallel and cross fractures of different distributions is analyzed. Furthermore possible consequences of different fractures are evaluated in view of oil and gas exploitation and displacement. The results show that at the fracture ends pressure changed suddenly and correspondingly the velocities changed sharply. For the matrix the fracture inlet is equal to confluence and the outlet equal to source. The symmetric fracture distribution leads to decrease of the flow in the surrounding matrix and the fracture flow is the main part in the cross section, however the asymmetric fracture distribution is conducive to increase flow in the matrix.

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