The Research Of Reducing Viscosity Technique By Emulsification And Its Application To Oil And Gas Gathering And Transferring

In our country, the crude oil of most oil field is high wax content, high condensation oil and high viscosity. To improve its fluidness and ensure the distilled oil-gas of the oil well can be collected and transported in security and effectively, a process of calefaction is used widely. And it can result in the use of precious oil-gas resource inconsequently. As the rising of total water-cut for oil wells, oil companies are facing difficulties on shortages of energy such as water, electricity power, and gas, which has badly influenced the sustained development of oil production, thus it becomes a critical problem that energy-saving and cost-cutting to be solved eagerly by oil companies. Decreasing the heating temperature of centralized transport, has become one of the important methods for energy-saving and cost-cutting of centralized transport systems in oil fields throughout world. Flow improver is a kind of chemical solvent that can improve oil flowing property and promote earlier phase transferring into oil-in-water. An effective approach which adds flow improver in the water cut oil is proposed. It can bring resistance reduction, viscosity reduction, wax control and wellhead back pressure reduction, consequently achieve the aim of sophisticating tepid water terminal.In this paper, the measure of theory analysis and practice combined is adopted. It reduces viscosity by emulsification technology and researches its application in centralized transport. By theory analysis and experiment, it analyses the characteristic of water cut oil pseudo emulsion which added in flow improver, the factors of affecting the stability of emulsion and the mechanism of action of flow improver. It researched the effect of flow improver and the optimal consistency by indoor and locale experiment. The local drag coefficien of the water cut oil pseudo emulsion which was in pumping unit far and embolism far is acquired using dimensional method. The mathematical model of the water cut oil draft emulsion restart after shutdown is established and validated using indoor experiment data.