Study on the Water Invasion and Its Effect on the Production from Multilayer Unconsolidated Sandstone Gas Reservoirs

Water invasion is a common occurrence in multilayer unconsolidated gas reservoirs, which results excessive water production and reduces the economic life of wells. However, due to multiple layers, active edge water, strong heterogeneity, mechanism its effect sandstone reservoir require understanding order improve efficiency minimize cost. In this study, an experimental study on commingled reservoirs was conducted understand process along with different permeability layers. The show that commingling mainly affected by two major factors including rate, jointly control encroaching advance path speed. nonuniform invade may occur easily prefers toward well high layers when condition large gradient rate. bypass flow will there are channels between causes blocking low-permeability periphery far away from findings can help for better effects properties so as optimize extraction conditions predict productivity reservoirs.