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：5月29日上午10:30-11:10,

報告地點：線上，可在全國重點實驗室A403集中聽報告

騰訊會議號：169-317-128

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