Quantification of the microstructure, effective hydraulic radius and effective transport properties changed by the coke deposition during the crude oil in-situ combustion
Quantification of the microstructure, effective hydraulic radius and effective transport properties changed by the coke deposition during the crude oil in-situ combustion
复制标题
原油原位燃烧过程中焦炭沉积改变的微观结构、有效水力半径和有效输运特性的量化
DOI：
10.1016/j.cej.2017.09.002
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发表时间：
2018
影响因子：
15.1
通讯作者：
史琳
中科院分区：
文献类型：
--
作者：
许强辉;魏龙;姜航;马斌;昝成;马德胜;史琳
原油火烧油层过程中的结焦是影响储层孔隙结构和渗透率的重要因素。在这项研究中，X射线计算机显微断层扫描和特定的图像处理程序被用来重建与焦炭沉积的填充床的显微断层图像。从重建的图像，与传输的微结构参数，如有效孔隙率，收缩和短程线曲折度进行了分析。采用格子Boltzmann方法模拟了微结构中的物质扩散和流体流动，以量化质量扩散率和渗透率。进行了实验工作，以验证数字显微结构和模拟的渗透率。分析了积炭对微孔结构和渗透率的影响。焦炭沉积模式显示在孔喉中有明显的沉积。通过对孔隙尺寸分布的分析，提出了一种更为合理的有效水力半径的几何计算方法，以更好地预测渗透率。基于有效输运性质和微结构参数，通过将渗透率分解为特征长度和微结构效应两个不同的贡献，引入了一个发展的渗透率关系。渗透率模型描述了所有相关几何参数对焦炭沉积导致的渗透率降低的主要影响。
Coke deposition during crude oil in-situ combustion (ISC) is an important phenomenon that significantly impacts the pore topology and permeability. In this study, X-ray computed microtomography and a specific image processing procedure were used to reconstruct the micro-tomographic images of packed beds with coke deposition. From the reconstructed images, the microstructural parameters related to the transport were analyzed, such as the effective porosity, the constrictivity and the geodesic tortuosity. The Lattice Boltzmann method was used to simulate the species diffusion and fluid flow through the microstructures to quantify the mass diffusivity and permeability. The experimental work was performed to validate the digital microstructures and the simulated permeability. The effects of the coke deposition on the pore topology and the permeability were analyzed. The coke deposition pattern showed significant deposition in the pore throat. Analyses of the pore size distribution lead to a more reasonable geometric approach to measure the effective hydraulic radius for the better permeability prediction. Based on the effective transport properties and the microstructural parameters, a developed permeability relation was introduced by factorizing the permeability into two distinct contributions from the characteristic length and the microstructural effect. The permeability model describes the main influences of all the relevant geometric parameters on the permeability reduction by the coke deposition.
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影响因子：
15.1
作者：
F. Larachi;Rachid Hannaoui;P. Horgue;F. Augier;Y. Haroun;S. Youssef;E. Rosenberg;M. Prat;M. Quintard
通讯作者：
F. Larachi;Rachid Hannaoui;P. Horgue;F. Augier;Y. Haroun;S. Youssef;E. Rosenberg;M. Prat;M. Quintard
生物膜积累对多孔介质流体力学的影响
影响因子：
11.4
作者：
CUNNINGHAM, AB;CHARACKLIS, WG;CRAWFORD, D
通讯作者：
CRAWFORD, D
影响因子：
2
作者：
Taiwo OO;Finegan DP;Eastwood DS;Fife JL;Brown LD;Darr JA;Lee PD;Brett DJ;Shearing PR
通讯作者：
Shearing PR
影响因子：
2.7
作者：
Berg, Carl Fredrik
通讯作者：
Berg, Carl Fredrik
影响因子：
2.4
作者：
Guo, ZL;Zheng, CG;Shi, BC
通讯作者：
Shi, BC