Information Integrated Technology of Reservoir Description and Reservoir Management

Physical Property Analysis and Sensitivity Damage Evaluation of Tight Sandstone Gas Reservoirs

“…Essentially, the incompatibility between mineralization and the formation leads to changes in pore throats, leading to changes in permeability. In 1958, scholars such as Monaghan caused changes in reservoir permeability by changing the mineralization degree of experimental fluids, and pointed out that the mineralization degree significantly decreased the permeability at the end of the month [6]; In 1963, Hewitt discovered the mechanism of water sensitivity phenomenon [7]. Because the low salinity fluid enters the formation and contacts with some clay minerals in the reservoir to produce the phenomenon of water absorption expansion, and along with the migration of clay minerals particles in the pore throat, the pore throat changes, the particle migration causes plugging, and causes irreversible damage to the reservoir [8] Gariel and Lnamdar observed through flow experiments that the permeability of fluids compatible with reservoir rocks continues to decrease when their flow velocity exceeds the critical flow velocity, which is known as reservoir velocity sensitivity.…”