报告内容摘要：

Low-Tension-Gas (LTG) has been demonstrated as an effective method for sub-miscible tertiary recovery in tight sandstone and carbonate reservoirs. Through the injection of a low foam-quality, low-rate surfactant-gas solution (LTG), a high tertiary recovery of 75-92% could be demonstrated with many of the same process attributes of Alkali-Surfactant-Polymer (ASP) flooding but without many of the limitations associated with polymer application in low permeability formations.

The use of gas for mobility control in chemical EOR is an attractive option to reduce or substitute polymer in conditions where its application is complicated. When gas is injected with the aqueous chemical solution, the simultaneous dispersed flow of two phases results in the mobility reduction of each phase. The combined mobility of two displacing phases is less than their individual mobility, thus resulting in improved mobility control and oil displacement. This characteristic of dispersed flow not only improves chemical conformance control, but also reduces the likelihood of gas plugging oil-rich low permeable rock matrix in heterogeneous reservoirs. Additionally, high initial oil saturation was tested to determine process tolerance to oil and evaluate potential for application during secondary recovery.

报告人简介：

Dr. Quoc Nguyen joined the faculty of The University of Texas at Austin in 2005 at the Department of Petroleum & Geosystems Engineering. He holds a BSc in Chemical Engineering, MBA in industrial management, MSc in Environmental Sciences, and PhD in Petroleum Engineering. Dr. Nguyen's recent research has focused on Colloid and Interface Science and the engineering of complex fluids, such as foam, nanoparticle dispersion, emulsion, surfactant and polymeric solutions. His research program with elements of modeling and experimentation has been aimed at understanding subsurface transport phenomena (including dynamics of colloids and complex fluids in porous media, reactive flow, and heat transfer), and developing optimum control methods for subsurface processes. His research has applications in enhanced oil recovery (EOR), conformance control technology, hydrocarbon production stimulation, in-situ thermal and chemical conversion of heavy oil and oil shale, and nanoparticle EOR and nano-sensing. In previous research in the downstream petroleum industry, he led several projects on oil refining (distillation and extraction) and petrochemical (cracking and reforming) processes. In the environmental area, Nguyen was involved in numerous industrial research projects on hazardous waste treatment and the development of clean production technologies.

His current DOE and Industry funded research projects are in the following areas:

    Chemical and gas flooding for Enhanced Oil Recovery
    Production stimulation of unconventional resources (tar sand, shale gas and shale oil)
    Conformance control with complex fluids
    Thermal and chemical conversion of bitumen and oil shale
    Functionalized nanoparticles for subsurface applications