Experiment on Gas–Liquid Sulfur Relative Permeability under High-Temperature High-Pressure Sour Gas Reservoir Condition

In the development of high temperature sour gas reservoirs, gas–liquid sulfur two phase percolations exist, which have a significant impact on permeability and well productivity. There are currently few reports experimental studies relative permeability. This study improves equipment process, it proposes an method for measuring curve. Several typical core samples from reservoir in Sichuan Basin, China were selected study, under pressure (HTHP) was measured. The results show that, first, critical flowing saturation liquid 40%, co-flow zone narrow. With increase saturation, decreased rapidly. Second, better physical properties core, greater damage to properties. residual fractured higher than matrix as increased, so did Third, had effect Gas rose, while remained essentially constant. Fourth, rock effective stress more sensitive stress.