RATIONAL SOLITARY WELL SPACING IN SOIL REMEDIATION PROCESSES

摘要

The present work addresses design aspects of soil remediation processes and suggests a rational well-spacing scheme to optimize the operational efficiency of systems and processes, considered in terms of pollute extracted per kW of mechanical power dissipated in pumps. The optimization scheme is proposed on the provisions of a universal map for steady-state two-phase flow in porous media, demarcating the process operational efficiency over the domain of the process operational parameters, i.e. the pollute/water flow-rate ratio and the capillary number. Process efficiency is considered over a formation volume containing a single well. Pertinent DeProF~2 model scaling law predictions for the reduced mechanical power dissipation are integrated across the formation control volume. Then, global values of energy utilization are estimated in terms of the process design parameters, i.e. the capillary number at the vicinity of the well-bore (Ca_0), the duty oil/water flow-rate ratio (r), and the radius of influence (p_c). Results indicate that, given the maximum permissible value of Cao, the overall efficiency of the process is increased with decreasing p_c.