The following factors can affect the temperature range for treating crude with 40% polydadmac liquid: 1.Characteristics of the crude 1). Oil content When the oil content of the crude is high, the interaction between oil droplets and 40% content emulsion polydadmac is greatly affected by temperature. The crude with a high oil content may require a higher temperature to ensure that 40% polydadmac liquid effectively breaks emulsified oil droplets, because a higher temperature helps reduce the viscosity of the oil and makes the oil droplets more mobile, thereby promoting the contact and reaction of 40% polydadmac liquid with the oil droplets. 2). Water content For the crude with a high water content, the properties of water at different temperatures have an impact on the treatment effect of 40% chemical polydadmac emulsion. For example, at low temperatures, the viscosity of water increases, which may hinder the diffusion of 40% chemical polydadmac emulsion molecules and affect their interaction with other components in the crude. At higher temperatures, some physicochemical properties of water change, such as a decrease in surface tension, which may change the working environment of 40% content emulsion polydadmac and affect the treatment effect. 3). Impurity composition and content --Solid impurities (such as sediment, mineral particles, etc.) and chemical impurities (such as salts, other chemical additives, etc.) in the crude will affect the relationship between the treatment effect of polydadmac for oil use and temperature. When the content of solid impurities is high, it may have different effects on the adsorption and flocculation of polydadmac product for crude oil at different temperatures. For example, at low temperatures, impurities may more easily wrap 40% polydadmac liquid molecules and reducing their effective effect; while at high temperatures, the presence of impurities may affect the overall stability of the solution, thereby affecting the treatment process of polydadmac for oil use. Chemical impurities, such as a high salt content may change the ionic strength of the crude and affect the ionization degree and charge effect of polydadmac product for crude oil at different temperatures. 2. Characteristics of 40% polydadmac liquid 1). Molecular weight --The activity and stability of 40% content emulsion polydadmac with different molecular weights in the crude are related to temperature. Polydadmac for oil use with a larger molecular weight may be more limited in the extension and movement of molecular chains at low temperatures, affecting the interaction effect of 40% polydadmac liquid with the components of the crude.

At high temperatures, polydadmac for oil use with a larger molecular weight may be more susceptible to thermal effects, such as molecular chain breakage, resulting in a decrease in the treatment effect. Polydadmac for oil use with a smaller molecular weight may show different performance in activity and stability when the temperature changes and the relationship between its treatment effect in the crude and temperature will also be different. 2). Concentration --The treatment effect of 40% chemical polydadmac emulsion with different concentrations in the crude is also affected by temperature. A higher concentration of polydadmac product for crude oil may have certain activity at low temperatures due to stronger intermolecular interactions, but at the same time, it may also be more prone to aggregation, affecting its uniform dispersion and interaction effect. At high temperatures, a high concentration of 40% polydadmac liquid may cause the reaction to be too intense due to the increase in temperature, resulting in unnecessary side reactions or rapid consumption, affecting the treatment effect. A lower concentration of 40% polydadmac liquid may require a more suitable temperature to ensure an effective reaction with the components of the produced fluid. 3.Factors related to the treatment process 1). Treatment time --If the treatment time is short, a relatively high temperature may be required to prompt 40% content emulsion polydadmac to act quickly to achieve a better treatment effect within a limited time. When the treatment time is long, 40% content emulsion polydadmac at a lower temperature may also have enough time to interact with the components of the crude to complete processes such as demulsification and flocculation. 2). Stirring intensity --When the stirring intensity is high, it will affect the degree of uniform mixing and interaction mode of polydadmac product for crude oil with the produced fluid at different temperatures.

At low temperatures, high-intensity stirring may help overcome the problem of slow molecular of polydadmac product for crude oil movement and enable 40% chemical polydadmac emulsion to better contact with the crude, but it may also lead to the destruction of flocs.

At high temperatures, high-intensity stirring may accelerate the reaction of 40% chemical polydadmac emulsion, but it may also cause excessive turbulence in the solution and affect the treatment effect. Under the condition of low stirring intensity, the influence law of temperature on the treatment effect of 40% content emulsion polydadmac on the crude is different.