Quantitative Evaluation of Imbibition Damage Characteristics of Foaming Agent Solutions in Shale Reservoir

Shale reservoirs are characterized by extremely low porosity and permeability, poor connectivity, high content of clay minerals. This leads to the reservoir being vulnerable imbibition damage caused foaming agent solutions during foam drainage gas recovery. It results in decrease permeability reduction well production ultimate Therefore, as most commonly used production, it is particularly important. study structured follows. First, we analyze evaluate characteristics shale within target area, that mineral composition microscopic pore throat structures. Second, types two selected be applied subsequent sensitivity tests. Simultaneously, nuclear magnetic resonance (NMR) method was shale, impact recovery processes. Finally, concluded degree core minimized when concentration agents 0.4–0.6%. A trend has been established for increased cores with increasing exposure time. Additionally, this provides technical guidance evaluation protection exploitation.