In this work, we approach the issue of the pipeline transportation of the crude oil – formation water mixtures in the oil fields. We present the transport simulation on a pipeline of certain mixtures. For the simulation, we used a numeric modeling software, inspired from that designed by ASPENTECH. The simulation results are presented synthetically as tables and suggestive charts. We analyze the pressure variation into the pipeline in the low flows field, considered specific. Additional simulations are presented to justify such behaviors.