Visualization by light transmission of oil and water contents in transient two-phase flow fields

Abstract The difficulty of determining transient fluid contents in a soil–oil–water system is hampering an understanding of the system's flow characteristics. In this paper, we describe a light transmission method (LTM) which can rapidly obtain oil and water contents throughout a large two-dimensional flow field of silica sand. By appropriately coloring the water with 0.005% FD&C blue #1, the hue of the transmitted light is found to be directly related to the water content within the porous media. The hue provides a high resolution measurement of the water and oil contents in transient flow fields (such as unstable flow). Evaluation of the reliability of LTM was assessed by checking the mass balance for a known water injection and its utility in visualizing a whole flow field was exemplified for unstable fingered flow by comparing fluid contents to those obtained with synchrotron X-ray radiation.

[1]  Jacob H. Dane,et al.  An improved method for the determination of capillary pressure-saturation curves involving TCE, water and air , 1992 .

[2]  J. Parlange,et al.  Rapid fluid content measurement method for fingered flow in an oil–water–sand system using synchrotron X-rays , 1998 .

[3]  R. Glass,et al.  Physics of gravity fingering of immiscible fluids within porous media: An overview of current understanding and selected complicating factors , 1996 .

[4]  J. H. Dane,et al.  Measurement and simulation of one-dimensional transient three phase flow for monotonic liquid drainage , 1988 .

[5]  G. Taylor,et al.  The penetration of a fluid into a porous medium or Hele-Shaw cell containing a more viscous liquid , 1958, Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences.

[6]  Vincent C. Tidwell,et al.  X ray and visible light transmission for laboratory measurement of two‐dimensional saturation fields in thin‐slab systems , 1994 .

[7]  John F. McBride,et al.  Dense Chlorinated Solvents in Porous and Fractured Media: Model Experiments , 1990 .

[8]  J. Parlange,et al.  High Intensity X-Ray and Tensiometer Measurements in Rapidly Changing Preferential Flow Fields , 1993 .

[9]  Karsten H. Jensen,et al.  Experimental study of movement and distribution of dense organic contaminants in heterogeneous aquifers , 1995 .

[10]  Calibration of a Dual-Energy Gamma Radiation System for Multiple Point Measurements in a Soil , 1986 .

[11]  Tammo S. Steenhuis,et al.  MECHANISM FOR FINGER PERSISTENCE IN HOMOGENEOUS, UNSATURATED, POROUS MEDIA: THEORY AND VERIFICATION , 1989 .

[12]  Tammo S. Steenhuis,et al.  Immiscible Displacement in Porous Media: Stability Analysis of Three‐Dimensional, Axisymmetric Disturbances With Application to Gravity‐Driven Wetting Front Instability , 1991 .

[13]  Jonathan F. Sykes,et al.  Laboratory and model simulations of a LNAPL spill in a variably-saturated sand, 1. Laboratory experiment and image analysis techniques , 1994 .

[14]  James W. Mercer,et al.  A review of immiscible fluids in the subsurface: properties, models, characterization and remediation , 1990 .

[15]  P. van Meurs,et al.  The Instability of Slow, Immiscible, Viscous Liquid-Liquid Displacements in Permeable Media , 1959 .