Study on Microscopic Flow Characteristics of Foam in Porous Media

doi:10.11885/j.issn.1674-5086.2020.05.05.02

Abstract

Abstract: The flow behavior of foam in pores affects the sweep range and displacement efficiency, and plays an important role in enhancing oil recovery. Firstly, the single capillary model is established, and the level-set method is used to study the influence factors of foam flow in a single capillary tube. The Jia Min effect, coalescence mechanism and micro selective migration mechanism of foam in porous media are analyzed. The plugging performance of different types of foam is evaluated. Secondly, a real pore medium microscopic numerical model is constructed through CT image of XB Oilfield core, and the migration characteristics of foam in it are studied. The results show that the degree of foam deformation decreases with the increase of tube diameter ratio, and the contact angle of wetting wall has no effect on the rheological properties of the foam. The critical value of liquid velocity is N₂ when the radius of the 1.2 foam m bubble ruptures, and the pressure of the foam passes through the channel is directly proportional to the surface tension. The foam has the microscopic migration characteristics through the large channel, and the N₂ foam has strong stability and plugging property. It is suitable for profile control and flooding in low permeability oilfield at high water cut stage, which provides beneficial enlightenment for field application of gas-liquid dispersion system for profile control and oil recovery improvement.

Key words: foam, porous medium, capillary, two phase flow, Level-set method

CLC Number:

TE348

JI Youjun, WANG Lilong, HAN Haishui, JIANG Guobin, WANG Zegen. Study on Microscopic Flow Characteristics of Foam in Porous Media[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2022, 44(4): 111-120.

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URL: http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.11885/j.issn.1674-5086.2020.05.05.02

http://journal15.magtechjournal.com/Jwk_xnzk/EN/Y2022/V44/I4/111

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