The study of bubble size distribution in reservoir during foam flooding and optimization design of gas alternating foami
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ICCESEN 2017
The study of bubble size distribution in reservoir during foam flooding and optimization design of gas alternating foaming liquid injection Ye Meng 1,2
&
Mingbo Li 1 & Xiangfang Li 2 & Minxia He 2 & Mingjie Jiang 3
Received: 7 November 2019 / Accepted: 27 October 2020 / Published online: 14 November 2020 # Saudi Society for Geosciences 2020
Abstract Foam flooding is one of the enhanced oil recovery (EOR) technologies that have great development potentials. The theoretical models of foam flooding at present include empirical models and mechanism models. The empirical models usually simplify the blocking effect of foam system in porous medium as a reduction coefficient of fluid mobility (mainly for gas phase). The mechanism models introduce the processes of foam propagation and decay, and its numerical simulation theory views these two processes as chemical reactions that involve reactants and products. However, these two kinds of foam models do not represent the micro-mechanical effects between the gas bubble and pore-throat in porous medium. In this work, a geometric model of pore-throat was established based on the core data of rate-controlled porosimetry. Then, the snap-off time of generating gas bubble in core sample was calculated with the data of foam flooding experiment. Finally, combined with numerical simulation, the distribution of bubble size in reservoir during foam flooding was calculated. Comparing different plans of gas alternating foaming liquid injection, it was found that when consuming the same amount of gas and foaming liquid, the increasing-ratio of gas alternating foaming liquid injection has a larger sweep range of foam and a more extended zone of effective-sized bubble than the constant-ratio injection does, which indicates that the increasing-ratio of gas alternating foaming liquid injection has a higher efficiency. Keywords Foam flooding . Bubble size . Snap-off . Slug injection
Introduction With the oil and gas resources being rapidly developed worldwide, conventional reservoir resources are becoming fewer, which drives petroleum workers to pay attention to unconven-
This article is part of the Topical Collection on Geo-Resources-EarthEnvironmental Sciences * Ye Meng [email protected] 1
China National Petroleum Corporation Greatwall Drilling Company, Beijing, China
2
China University of Petroleum Beijing, Beijing, China
3
Nanpu Oilfield Operation Distric of Jidong Oilfield Company, China National Petroleum Corporation, Shanghai, China
tional reservoirs (Ding et al. 2018; Meng et al. 2019; Meng et al. 2018; Peng and Li 2018; Sun et al. 2017a, b; Sun et al. 2018a, b; Yang et al. 2016; Yang et al. 2017; Zhao et al. 2018; Zheng et al. 2018). Among a variety of enhanced oil recovery (EOR) technologies, foam flooding is considered one that has great development potentials (Ettinger and Radke 1992; Gauglitz et al. 2002; Kovscek et al. 1993; Kovscek and Radke 1996; Nguyen et al. 2003; Radke and Gillis 1990; Roof 1970; Tang and Kovscek 2004). Foam is a disperse system of ga
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