Investigation of the effect of the combined methods on the rheological properties of high-paraffin oils

The impact of a magnetic field, the Difron-4201 depressor additive, a new composition with the conventional name N-1, and the synergistic effect of N-1 combined with a magnetic field on paraffin deposition and freezing temperature in high paraffin crude oil was studied for the first time. Laboratory experiments were conducted using the “cold finger” method at surface temperatures of 5, 10, 15, 20, and 25°C to assess paraffin deposition. The combined method (N-1 + magnetic field) demonstrated the most significant reduction in paraffin deposition across varying temperatures. The physical, chemical, and physicochemical effects on the freezing temperatures of high paraffin oil were evaluated following the RD standard method. Optimal usage rates were determined to be 600 g/t for the Difron-4201 depressor additive and 500 g/t for the N-1 composition. Similar to paraffin precipitation, the combined influence of the magnetic field and N-1 composition showed the most effective reduction in freezing temperature. It was also determined that the magnetic field, the Difron-4201 depressor additive, the new composition N-1, and the combined N-1 + magnetic field method affect the effective viscosity of high paraffin crude oil, with the combined method producing the most notable changes. Additionally, the bactericidal properties of the new composition N-1 were evaluated by studying its effect on sulfate-reducing bacteria over fifteen days under laboratory conditions using Postgate-B nutrient medium. N-1 exhibited the highest bactericidal effect at a concentration of 500 g/t, achieving a bactericidal effectiveness of 97%.