Molecular Dynamics Simulation of Clay Hydration Inhibition of Deep Shale

In the process of exploitation deep oil and gas resources, shale wellbore stability control faces great challenges under complex temperature pressure conditions. It is difficult to reflect micro mechanism action inorganic salt on hydration with traditional experimental evaluation technology macro effect restraining hydration. Aiming at characteristics clay minerals shale, molecular dynamics models four typical cations (K+, NH4+, Cs+ Ca2+) inhibiting have been established by use simulation method. Moreover, has systematically evaluated, as law cation inhibition performance in response temperature, ion type. The research indicates that can promote contraction interlayer spacing, compress fluid intrusion channels, reduce ability water molecules, increase negative charge balance electrostatic repulsion force. With montmorillonite weakened, while opposite. Through different temperatures pressures, we understand microcosmic provide theoretical guidance for