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报告题目：Critical Thresholds for CO₂ Foam Generation and Propagation in Homogeneous Porous Media（均质多孔介质中CO₂泡沫产生和运移临界阈值研究）

报 告 人：唐金玉

报告时间：上午10:30-11:10, 2024.05.29

报告地点：线上

报告人简介：

唐金玉，现任阿联酋大学助理教授及石油工程实验室主任，2019年获得荷兰代尔夫特理工大学地球科学与工程博士，其间曾赴荷兰壳牌总部和巴西国家数学研究院任访问学者。主要研究方向包括多孔介质渗流、气驱及泡沫驱流度控制和地下储能的基础理论及应用研究。常用的研究方法包括岩芯驱替、X-ray CT成像、微流控、分流理论和多相流建模。目前在Water Resources Research、SPE Journal、Energy、Fuel、Petroleum Science等国际知名期刊发表论文十余篇。

目前代表性成果包括推进了泡沫对气体流度控制的基础理论，发现了泡沫在油气水三相共存复杂条件下的基本流动机制、建立了X-ray CT 成像测定泡沫驱三相饱和度的方法、提出了一个新的适用于2D微观孔隙网络的毛细管数定义。曾多次受邀国际知名企业及研究机构做主题报告，包括阿布扎比国家石油公司、振华石油海外项目部、巴西国家数学研究院、荷兰壳牌总部等。

内容简介：

Foam is a promising means for improving gas sweep and trapping in geological formations. The successful application of foam for deep gas mobility control relies on its long-distance propagation away from an injection well, where pressure gradient or fluid velocity is low. Foam propagation is a result of two processes: convection of bubbles generated upstream (e.g. in the near-well region) and new generation of bubbles at the displacement front.

Prior studies with N₂ foam show the existence of critical thresholds for both foam generation and propagation in terms of a minimum pressure gradient or equivalent minim total interstitial velocity. Data on N₂ foam show that its long-distance propagation is challenging, as the minimum pressure gradients required for the generation and propagation are way much higher than that seen in the field. Our recent data with CO₂ show that the minimum pressure gradient for triggering foam generation is 2–3 orders of magnitude less than with N₂ foam, which can be easily attainable throughout a formation. This demonstrates that the generation of CO₂ foam is much less an issue than for N₂ foam.

Another issue we are addressing is the propagation of CO₂ foam deep in formations. with In lab studies, with conventional corefloods that use cores of uniform diameter, it is difficult to determine the minimum pressure gradients/minimum total interstitial velocity for foam propagation. We would introduce a novel coreflood approach to quantify the conditions for foam propagation in geological formations.

主办单位：油气藏地质及开发工程全国重点实验室

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科学技术发展研究院

2024年5月20日