【全國科技活動周系列學術報告】
報告題目：Critical Thresholds for CO2 Foam Generation and Propagation in Homogeneous Porous Media（均質多孔介質中CO2泡沫產生和運移臨界閾值研究）
報 告 人：唐金玉
報告時間：上午10:30-11:10, 2024.05.29
報告地點：線上
報告人簡介：
唐金玉，現任阿聯酋大學助理教授及石油工程實驗室主任，2019年獲得荷蘭代爾夫特理工大學地球科學與工程博士，其間曾赴荷蘭殼牌總部和巴西國家數學研究院任訪問學者。主要研究方向包括多孔介質滲流、氣驅及泡沫驅流度控制和地下儲能的基礎理論及應用研究。常用的研究方法包括巖芯驅替、X-ray CT成像、微流控、分流理論和多相流建模。目前在Water Resources Research、SPE Journal、Energy、Fuel、Petroleum Science等國際知名期刊發表論文十余篇。
目前代表性成果包括推進了泡沫對氣體流度控制的基礎理論，發現了泡沫在油氣水三相共存復雜條件下的基本流動機制、建立了X-ray CT 成像測定泡沫驅三相飽和度的方法、提出了一個新的適用于2D微觀孔隙網絡的毛細管數定義。曾多次受邀國際知名企業及研究機構做主題報告，包括阿布扎比國家石油公司、振華石油海外項目部、巴西國家數學研究院、荷蘭殼牌總部等。
內容簡介：
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.
主辦單位：油氣藏地質及開發工程全國重點實驗室
西南石油大學石油與天然氣工程學院
SPE成都分部
科學技術發展研究院
2024年5月20日
