Experimental investigation of interfacial tension in two-phase system involving methane and water

摘要: The understanding of the physical properties reservoir fluids such as viscous and interfacial forces is critical in many oil gas, petrochemical, other related industries. In gas industry, production, transportation processing hydrocarbon involve dealing with multiphase system. Viscosity tension (IFT) are among fluid that affect behaviour. These have significant effects on flow characteristics, thus their importance production aspects from to surface facilities. Hence accurate determination these plays a vital role predicting managing associated problems faced by industry hydrates, scale corrosion. Surfactants added along line, prevent hydrate formation, depressing formation temperature, transport it slurry when formed avoid pipe blockages. While research has been conducted conditions, but Pipeline system, presence salt polymer-surfactants which tend alter IFT behaviour not well studied. This study investigates methane/water experimentally (NaCl) (PEG 8000-SDS) at operating conditions suitable for upstream midstream application. Also, experimental investigation pH, resistivity, conductivity, viscosity density liquid phase (brine + polymer-surfactant) was characterises phase. The results show electrical resistivity conductivity depend significantly ionic concentration NaCl presents. Resistivity decreases increasing 0.22 Ω-m 2.9 wt% 0.075 10.7wt% NaCl, shows possibility corroding case pipeline measured an increase 4.55 13.33 S/m 10.7 respectively. This affirmed strength could cause scaling corrosion High system also signifies potentially harmful accumulation solids cooling towers. Conductivity investigated function temperature. all studied, temperature (298.15, 303.15, 308.15 313.15 K) led corresponding average 0.74 values ionisation. Results obtained affects pH solution. value observed 6.5 ≈ 7.0 8.2 40 PEG 8000 same 6.9. Knowing aqueous solutions, accurately determine solution determines much SDS were presented 298.15 – K. shear stress 10 found increased 0.14 Pa 28.1 s-1 7.6 340.5 indicating Newtonian apparent curve obtained, 3.7 cP 58.1 8000. However, each concentration, be decreasing rate. Results two-phase involving methane water pressure, salinity, surfactant/polymer. Both pressure working CH4-H2O. Presences 2.9, 5.6, resulted rise 1.46, 2.57, 3.51 4.24 mN.m-1 respectively, IFT. due pipeline. Further, active reduces IFT, micelle-like 30 more effect addition 0.5 SDS. Therefore, percentage good combination prevention Some evaluated against independent data gathered open sources validate method methane-water interface 8000, here reported first time.