The applications of polyetheramine D230 (CAS: 9046-10-0) in oilfield chemicals are diverse and crucial, mainly covering drilling fluid additives, oil displacement agents, and other aspects. Detailed explanations are as follows:
Polyetheramine D230 can undergo dehydration reaction with dimer acid in a dispersant, followed by amidation with acid anhydride to prepare a high-temperature resistant rheology modifier for oil-based drilling fluids. This modifier exhibits excellent temperature resistance (up to 240°C) as well as good dispersibility, solubility, viscosity-increasing and shear-thickening properties, and compatibility. It can enhance the viscosity and shear force of drilling fluids, making it suitable for various oil-based drilling fluid systems.
Polyetheramines with terminal amino groups, such as D230, can be used in formulating drilling fluid systems. They effectively inhibit the hydration, dispersion, and swelling of active shale, ensuring good wellbore stability. They can also coat drill cuttings to improve theirintegrity and clean the wellbore. Additionally, they reduce torque, offer excellent lubrication and anti-sticking performance to facilitate smooth tripping operations, and significantly decrease the adhesion of soft shale to drill strings, preventing bit balling and improving drilling rate.
Polyetheramine D230 can serve as a component of alkanolamine inhibitors. It is mixed with polyetheramine D400, polyethylene glycol 400, triethanolamine, pentaethylenehexamine, etc., to prepare high-temperature resistant saturated salt environmentally friendly water-based drilling fluids, playing a role in inhibiting clay hydration and dispersion.
Polyetheramine D230 can be used to prepare ASP (alkali-surfactant-polymer) composite oil displacement agents where polyetheramine replaces inorganic alkali. Using organic base polyetheramine instead of traditional inorganic alkali in composite flooding effectively protects the formation rock structure and inhibits the dispersion of clay particles in injected fluids. It has little impact on the viscosity and viscoelasticity of the oil displacement system. The added organic base reacts with acidic substances such as naphthenic acids in crude oil to produce surfactants, which have a synergistic effect with externally added surfactants. This reduces the oil-water interfacial tension to ultra-low levels, thereby improving oil recovery efficiency.
Polyetheramine ammonium salt D230 can cooperate with fatty acids to construct a new type of switchable solvent system for the extraction treatment of oil-based drill cuttings. The adsorption of polyetheramine ammonium salt D230 at the interface changes the wettability of drill cuttings and promotes the stripping of heavy components. Fatty acids dissolve total petroleum hydrocarbons and reduce their viscosity. The two work synergistically to achieve enhanced extraction treatment of oil-based drill cuttings.
