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多孔介质中不互溶气-液两相驱替前缘的界面条件

The connection conditions of phase pressures and Darcy velocities at gas-water flood front in porous media

Abstracts

气-液两相驱替在油气藏开发中广泛存在。传统的渗流理论认为压力和达西速度在非连续界面处是连续的,我们在以往的研究对其进行了证伪。本文在前期不可压缩流体的基础上,以气-水两相驱替为例,研究了多孔介质中移动的气-水突变界面处的压力和渗流速度的连接条件。研究结果表明,在气-水两相驱替界面处:(1)总体压连续,但流体压力可以不连续;(2)总体流速的分布可以不连续,但满足特定的函数关系;(3)流体各相渗流速度不连续。
[英文摘要]Gas-liquid two-phase displacement are widely observed in oil and gas reservoir. The traditional seepage theory holds that the phase pressures and Darcy velocities must be continuous at the jump interface, and we have falsified them in previous studies. In this paper, the jump interface condition of two-phase seepage is extended from incompressible fluids to compressible. Taking gas-water displacement as an example, the new connection conditions of phase pressures and Darcy velocities at the gas-water displacement front in porous media were built. The results show that at the flood front, the global pressure is continuous, but not the fluid pressure are. (2) The total Darcy velocity can be discontinuous with a specific functional relationship;(3) The phase Darcy velocity of each phase of the fluid is discontinuous.
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From: 彭小龙
DOI:10.12074/202012.00069
Recommended references: 彭小龙,朱苏阳,梁保升,王超文,邓鹏.(2020).多孔介质中不互溶气-液两相驱替前缘的界面条件.[ChinaXiv:202012.00069] (Click&Copy)
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[V1] 2020-12-25 13:33:41 chinaXiv:202012.00069V1 Download
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