ID 75667
タイトルヨミ
ミクロ スケール カラ ノ ゲンショウ カイメイ ニ モトズイタ タンカ スイソ シゲン ノ ゾウシン カイシュウホウ ノ カイハツ
タイトル別表記
R&D on Enhanced Recovery Schemes of Hydrocarbon Resources Based on the Clarification of Mechanisms on a Micro Scale.
著者
末包, 哲也 徳島大学大学院ソシオテクノサイエンス研究部
キーワード
surfactant
porous plate
gas flooding
enhanced oil recovery
trapping mechanism
snap-off
資料タイプ
紀要論文
抄録
An important aspect of any enhanced oil recovery (EOR) process is the effectiveness of process fluids in removing oil form the rock pores at the microscopic scale. Capillary and viscous forces govern phase trapping and mobilization of fluids in porous media. Understanding the role of pore-level mechanisms is essential to the design of EOR process in oil-fields. In present study, first, we observed the pore-scale mechanisms of surfactant flooding and water-alternated-gas (WAG) scheme by using the porous plates. Reduction in the interfacial tension between oil and water due to surfactant results in the enhancement of oil productivity. During this process, some fraction of oil tends to be in an emulsion state, which suggests that the snap-off mechanisms are changed with the reduction in surface tension. In WAG processes, injection of gas both before and after surfactant injection facilitates to bring surfactant to the interface between oil and water by blocking the paths of water break-through. Finally, the oil trapping process in water flooding was visualized in a three-dimensional packed bed of glass beads by means of X-ray CT scanning. Piston-like displacement in a pore-network scale is primary mechanism in oil trapping comparing with the snap-off at pore-throat.
掲載誌名
徳島大学大学院ソシオテクノサイエンス研究部研究報告
ISSN
21859094
cat書誌ID
AA12214889
56
開始ページ
38
終了ページ
44
並び順
38
発行日
2011
フルテキストファイル
言語
jpn