Effect of Polymer and Polymer Gel on Disproportionate Permeability Reduction to Gas and Water for Tight Gas Baojun Bai, Petroleum Engineering, Missouri University of Science and Technology, Rolla, MO 65401, baib@mst.edu 1. Core flooding system for two phase flow in fracture 2. Single molecule detection and imaging system 3. Poremaster to measure the size distribution of pores and microfractures in a shale rock 10 nm 1 m (a) PoreMaster 60 (b) shale sample (c) Pore size distribution of a shale sample