Simulating a down hole jet pump

Hi, I'm an intern for a company that provides jet pumps for artificial lift. I'm currently trying to run some simulations in flow simulation, I have the inlet flows and exit pressures defined but some of the internal pressures I receive from flow simulation are way to high. Does anyone know of why this might be and if there is a proper way to simulate oil wells in flow simulation?

SolidworksFlow Simulation