Characterization of Hysteretic Multiphase Flow from the MM to M Scale in Heterogeneous Rocks
Characterization of Hysteretic Multiphase Flow from the MM to M Scale in Heterogeneous Rocks
复制标题
非均质岩石中从 MM 到 M 尺度的滞回多相流特征
DOI：
10.1051/e3sconf/20198902001
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发表时间：
2019
影响因子：
--
通讯作者：
Jackson S
中科院分区：
文献类型：
--
作者：
Jackson S
将毫米-米尺度的毛管压力不均匀性转化为放大的数值模型是成功预测低流量潜在羽流迁移和捕获的关键。在这样的条件下，放大，等效相对渗透率纳入毛细管压力的非均质性是远远从传统的粘性极限，取决于非均质性的结构和流速，即取决于毛细管数。SCA 2017研讨会（SCA 2017 -022）的最新工作展示了如何在排水条件下从地下的非均质岩心上获得等效函数;超越了传统的SCAL。使用医学CT扫描的实验观察可以与数值建模相结合，使得可以直接表征非均质地下岩心并用于填充现场规模的储层模型。在这项工作中，我们扩展了这种表征方法，将吸胀循环的方法。我们使用一个本特砂岩岩心与几个实验CO2-盐水岩心驱数据集在不同的流量（2x排水，1x吸胀和2x捕获），以证明滞后多相流功能的表征在水湿岩石。我们发现，毫米-米尺度的实验饱和度和等效，低流动潜力相对渗透率可以预测排水和吸胀，沿着与捕获特性。与排水情况一样，等效渗吸相对渗透率是毛细管数的函数。我们还发现，在吸胀过程中的毛细管压力函数的形式有很大的影响，与局部非均质圈闭减少（或消除），如果毛细管压力下降到零，或以下的剩余饱和度。
Incorporating mm-m scale capillary pressure heterogeneity into upscaled numerical models is key to the successful prediction of low flow potential plume migration and trapping at the field scale. Under such conditions, the upscaled, equivalent relative permeability incorporating capillary pressure heterogeneity is far from that derived conventionally at the viscous limit, dependent on the heterogeneity structure and flow rate, i.e. dependent on the capillary number. Recent work at the SCA 2017 symposium (SCA2017-022) demonstrated how equivalent functions can be obtained on heterogeneous rock cores from the subsurface under drainage conditions; going beyond traditional SCAL. Experimental observations using medical CT scanning can be combined with numerical modelling so that heterogeneous subsurface rock cores can be directly characterized and used to populate field scale reservoir models. In this work, we extend this characterization approach by incorporating imbibition cycles into the methodology. We use a Bunter sandstone core with several experimental CO2– Brine core flood datasets at different flow rates (2x drainage, 1x imbibition and 2x trapping) to demonstrate the characterization of hysteretic multiphase flow functions in water-wet rocks. We show that mm-m scale experimental saturations and equivalent, low flow potential relative permeabilities can be predicted during drainage and imbibition, along with trapping characteristics. Equivalent imbibition relative permeabilities appear as a function of capillary number, as in the drainage cases. We also find that the form of capillary pressure function during imbibition has a large impact on the trapping characteristics, with local heterogeneity trapping reduced (or removed), if the capillary pressure drops to zero, or below at the residual saturation.
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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
影响因子：
2.8
作者：
Behrooz Raeesi;N. Morrow;G. Mason
通讯作者：
G. Mason
DOI：
--
发表时间：
1984
期刊：
影响因子：
--
作者：
G. Chierici
通讯作者：
G. Chierici
影响因子：
5.4
作者：
Jackson, Samuel J.;Agada, Simeon;Krevor, Samuel
通讯作者：
Krevor, Samuel
稳态升级中的速率依赖性
影响因子：
2.7
作者：
L. Odsæter;C. Berg;A. Rustad
通讯作者：
A. Rustad