Capillary Pressure Hysteresis Behavior of Three Sandstones Measured with a Multistep Outflow–Inflow Apparatus
Capillary Pressure Hysteresis Behavior of Three Sandstones Measured with a Multistep Outflow–Inflow Apparatus
复制标题
用多级流出-流入装置测量三种砂岩的毛细管压力滞后行为
DOI：
10.2136/vzj2013.06.0097
复制
发表时间：
2014
影响因子：
2.8
通讯作者：
G. Mason
中科院分区：
文献类型：
--
作者：
Behrooz Raeesi;N. Morrow;G. Mason
许多具有实际重要性的现象，例如土壤中的水运动以及从地下储层中回收石油和天然气，都涉及天然多孔材料中的毛细压力滞后。实验毛管压力-饱和度关系提供了孔隙系统和多相驱替的重要信息。数据，在不同层次的细节，可用于强润湿的土壤和球包，但很少有详细的滞后数据已被报告为巩固的多孔介质，如岩石，在等效的润湿条件。一种新的多孔板装置和程序已被用来提供广泛的毛细管压力滞后关系在几天内，一个显着的改进，以前的方法。空气-盐水数据为三种类型的固结砂岩。记录每个数据点的流出和流入速率。从一次排液曲线和二次排液曲线出发，得到了渗吸扫描曲线。还测量了从不同初始含水饱和度水平开始的自吸曲线分支的排水扫描曲线。数据符合严格的质量测试，因为所有磁滞回线都显示出理论预测的闭合，并且通常报告为松散介质。滞后曲线的整体形式与流体分布、逾渗效应和圈闭有关。初始润湿相（WP）的饱和度与残余非润湿相（NWP）的关系提供了详细的信息，在不同的初始饱和度，二氧化碳封存特别感兴趣的参数开始的自吸捕获的程度。动态流出-流入数据的特征提供了排水和吸入流速差异的指示。
Many phenomena of practical importance, such as water movement in soils and the recovery of oil and gas from subterranean reservoirs, involve capillary pressure hysteresis in natural porous materials. Experimental capillary pressure–saturation relationships provide important information on pore systems and multiphase displacements. Data, at various levels of detail, are available for strongly wetted soils and sphere packs, but very few detailed hysteresis data have been reported for consolidated porous media, such as rocks, at equivalent wetting conditions. A new porous plate apparatus and procedure have been used to give extensive capillary pressure hysteresis relationships within a few days, a significant improvement on previous methods. Air–brine data are presented for three types of consolidated sandstones. Rate of outflow and inflow were recorded for each data point. Imbibition scanning curves have been obtained starting from the primary and secondary drainage curves. Drainage scanning curves that branch from imbibition curves starting at different levels of initial water saturation have also been measured. The data met a stringent test of quality in that all hysteresis loops exhibited closure as predicted by theory and as usually reported for unconsolidated media. The overall form of the hysteresis curves is related to fluid distributions, percolation effects, and trapping. Initial wetting phase (WP) saturation versus residual nonwetting phase (NWP) relationships provide detailed information on the extent of trapping for imbibition starting at different initial saturations, a parameter of particular interest in carbon dioxide sequestration. Features of the dynamic outflow–inflow data provided indication of the differences in flow rates for drainage and imbibition.
DOI：
10.1073/pnas.1221373110
发表时间：
2013-03-05
影响因子：
11.1
作者：
Berg, Steffen;Ott, Holger;Stampanoni, Marco
通讯作者：
Stampanoni, Marco