Study on Sand Production Evolution Mechanism of High Muddy Silt and Fine Sand Hydrate Reservoir Exploitation in Sea Area

According to the grading curve and Water content allocation of hydrate reservoir, particle size distribution water condition formation sand are simulated, gas drive pressure difference is set. Under gravel packing control, one-dimensional unidirectional flow high argillaceous fine under analyzed, parameters such as displacement difference, rate, proportion permeability measured. The three phase percolation law gas, solid particles from initial stage end test was systematically analyzed. results show that evolution process production divided into four stages: particle-free migration, slow rapid migration structure stability. time specific controlled by gas-water conditions. Because mud content, will migrate consolidate on outer wall retention form a layer (permeability 0.1–5 Milli Darcy). has certain stable strength, which significant influence conditions no obvious percolation. reveal mechanisms for exploitation natural reservoirs, namely sanding process, filling blocking resistance with strength.