ID 75667
Title Transcription
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
Title Alternative
R&D on Enhanced Recovery Schemes of Hydrocarbon Resources Based on the Clarification of Mechanisms on a Micro Scale.
Author
Suekane, Tetsuya Department of Mechanical Engineering, Graduate School of Engineering, The University of Tokushima
Keywords
surfactant
porous plate
gas flooding
enhanced oil recovery
trapping mechanism
snap-off
Content Type
Departmental Bulletin Paper
Description
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.
Journal Title
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
NCID
AA12214889
Volume
56
Start Page
38
End Page
44
Sort Key
38
Published Date
2011
FullText File
language
jpn