Laboratory Investigation of Rheological Properties of Polymer and Crude Oil
Recent Advances in Petrochemical Science
Plastic Viscosity (PV) is a resistance of fluid to flow. According to the Bingham plastic model, the PV is the slope of shear stress and shear rate ( Figure 1 ). (Drilling formulas: Viscosity of drilling mud)  . Typically, the viscometer is utilized to measure shear rates at 600, 300, 200, 100, 6, and 3 revolutions per minute (rpm). With increased use of polymerbased fluids in the oil field, the power law (PL) model became popular because it fits the behavior of these fluids better than the
... ds better than the Bingham plastic model. The model's relationship between shear stress and shear rate is given by Recent Adv Petrochem Sci 2(5): RAPSCI.MS.ID.555600 (2017) 0089 Abstract By analyzing the rheological properties of polymer and crude oil, it was found that polymer action on different crude samples vary with respect to fluid type. Fluid resistance to flow decreased after 0.01Molar Concentration of polymer (Xanthan gum) was used to form a buffer solution with 500mls of water kept for a period of 7days. 400mls of the buffer solution formed with Xanthan gum + 200mls of each crude oil sample were used to make an investigation of the rheological properties of the polymer and crude oil. The Rheology of the crude samples, buffer solution and the crude oil samples + buffer solution were recorded at a constant temperature of 25 0 C was also taken.The growth of microbes was discovered after 7days this microbes further reduced the resistant to fluid flow by breaking the heavy hydrocarbon molecules, compared to their initial viscosities. The viscosity of fluid flow was monitored via shear stresses in relation to different shear rates using the Power Law Model which graphically interprets how the fluid responds to shear thinning, monitored at different revolutions per minute (rpm) was discovered to give best response at a high shear rate of 600rpm.The investigation of the fluid flow was done by modeling a simulated reservoir using sandstone tube from Darcy's equation for fluid diffusivity which confirms that a decrease in viscosity causes an increase in the flow rate with the assumption made that fluid flow rate equals production rate. The xanthan gum polymer is preferably used because it is cost effective and environmentally friendly.