A kind of polyamine inhibitor containing sulfonic acid group and preparation method thereof

Abstract

The invention discloses a preparation method for a sulfonic-group-containing polyamine shale inhibitor. The method comprises the following steps: (1) adding cyclic ether and sultone into organic amine at a temperature of 50 to 90 DEG C under stirring, wherein a mol ratio of organic amine to added cyclic ether is 1:2-3, a mol ratio of organic amine to added sultone is 1:0.5-1, and reaction time is 1 to 4 h; (2) heating the material obtained in the step (1) to 70 to 110 DEG C and adding epichlorohydrin under stirring; and (3) adding a terminator into the material obtained in the step (2), wherein a mol ratio of the terminator to organic amine is 1-2:1, reaction time is 1 to 2 h, and the sulfonic-group-containing polyamine shale inhibitor is prepared after the reaction. The sulfonic-group-containing polyamine shale inhibitor provided by the invention has excellent inhibition performance under the conditions of high temperature and high salinity; and the preparation method for the inhibitor is simple, does not produce special smell and is friendly to the environment.

Description

technical field

[0001] The invention relates to a sulfonic acid group-containing polyamine inhibitor and a preparation method thereof. Background technique

[0002] Drilling fluid refers to the general term of various circulating fluids that meet the drilling needs with its multiple functions during the oil and gas drilling process. The functions of drilling fluid mainly include: carrying and suspending cuttings; stabilizing well wall and balancing formation pressure; cooling and lubricating drill bit and drilling tools; transmitting hydrodynamic force.

[0003] With the development of the field of oil and gas exploration, the emergence of deep wells, ultra-deep wells, ocean wells and wells in complex areas, the difficulty of drilling has increased, and the requirements for drilling fluid systems have become more and more stringent. Especially in the process of oil and gas drilling, when drilling into shale formations, the hydration expansion and dispersion of shale will le...

Examples

Embodiment 1

[0022] First set the reaction temperature to 65°C, stir and pass ethylene oxide into diethylenetriamine and add 1,3-propane sultone dropwise. The molar ratio of diethylenetriamine to ethylene oxide is 1:2, the molar ratio of diethylenetriamine to 1,3-propane sultone is 1:0.7, control the reaction temperature not lower than 60°C, react for 2.5h; then raise the temperature to 85°C, under stirring conditions Add epichlorohydrin dropwise, the mol ratio of epichlorohydrin to diethylenetriamine is 0.6:1, the reaction time is 1.5h, and finally add terminator concentrated hydrochloric acid, the mol ratio of concentrated hydrochloric acid to diethylenetriamine is 1: 1. The polyamine shale inhibitor was prepared after 1 hour of reaction.

Embodiment 2

[0024] Set the reaction temperature to 75°C, stir and add propylene oxide and 1,4-butane sultone dropwise into triethylenetetramine, the molar ratio of triethylenetetramine to propylene oxide is 1:3, The molar ratio of triethylenetetramine to 1,4-butane sultone is 1:0.5, control the reaction temperature not lower than 70°C, and react for 2 hours; then raise the temperature to 90°C, and add epoxy chlorine dropwise under stirring The molar ratio of propane, epichlorohydrin and diethylenetriamine is 0.5:1, and the reaction time is 1h; finally, the terminator formic acid is added, and the molar ratio of formic acid to diethylenetriamine is 1.5:1, and the reaction time is 1h. Polyamine shale inhibitors.

Embodiment 3

[0026] Set the reaction temperature to 85°C, stir and add propylene oxide and 1,4-butane sultone dropwise into tetraethylenepentamine, the molar ratio of tetraethylenepentamine to propylene oxide is 1:2.5, The molar ratio of tetraethylenepentamine to 1,4-butane sultone is 1:0.8, control the reaction temperature not lower than 80°C, react for 1.5h; then raise the temperature to 100°C, add epoxy dropwise under stirring condition Chloropropane, the molar ratio of epichlorohydrin to diethylenetriamine is 0.8:1, and the reaction time is 1.5h; finally add the terminator acetic acid, the molar ratio of acetic acid to diethylenetriamine is 1.8:1, and react for 1h Finally, polyamine shale inhibitors are prepared.

technical field

[0001] The invention relates to a sulfonic acid group-containing polyamine inhibitor and a preparation method thereof. Background technique

[0002] Drilling fluid refers to the general term of various circulating fluids that meet the drilling needs with its multiple functions during the oil and gas drilling process. The functions of drilling fluid mainly include: carrying and suspending cuttings; stabilizing well wall and balancing formation pressure; cooling and lubricating drill bit and drilling tools; transmitting hydrodynamic force.

[0003] With the development of the field of oil and gas exploration, the emergence of deep wells, ultra-deep wells, ocean wells and wells in complex areas, the difficulty of drilling has increased, and the requirements for drilling fluid systems have become more and more stringent. Especially in the process of oil and gas drilling, when drilling into shale formations, the hydration expansion and dispersion of shale will le...

Examples

Embodiment 1

[0022] First set the reaction temperature to 65°C, stir and pass ethylene oxide into diethylenetriamine and add 1,3-propane sultone dropwise. The molar ratio of diethylenetriamine to ethylene oxide is 1:2, the molar ratio of diethylenetriamine to 1,3-propane sultone is 1:0.7, control the reaction temperature not lower than 60°C, react for 2.5h; then raise the temperature to 85°C, under stirring conditions Add epichlorohydrin dropwise, the mol ratio of epichlorohydrin to diethylenetriamine is 0.6:1, the reaction time is 1.5h, and finally add terminator concentrated hydrochloric acid, the mol ratio of concentrated hydrochloric acid to diethylenetriamine is 1: 1. The polyamine shale inhibitor was prepared after 1 hour of reaction.

Embodiment 2

[0024] Set the reaction temperature to 75°C, stir and add propylene oxide and 1,4-butane sultone dropwise into triethylenetetramine, the molar ratio of triethylenetetramine to propylene oxide is 1:3, The molar ratio of triethylenetetramine to 1,4-butane sultone is 1:0.5, control the reaction temperature not lower than 70°C, and react for 2 hours; then raise the temperature to 90°C, and add epoxy chlorine dropwise under stirring The molar ratio of propane, epichlorohydrin and diethylenetriamine is 0.5:1, and the reaction time is 1h; finally, the terminator formic acid is added, and the molar ratio of formic acid to diethylenetriamine is 1.5:1, and the reaction time is 1h. Polyamine shale inhibitors.

Embodiment 3

[0026] Set the reaction temperature to 85°C, stir and add propylene oxide and 1,4-butane sultone dropwise into tetraethylenepentamine, the molar ratio of tetraethylenepentamine to propylene oxide is 1:2.5, The molar ratio of tetraethylenepentamine to 1,4-butane sultone is 1:0.8, control the reaction temperature not lower than 80°C, react for 1.5h; then raise the temperature to 100°C, add epoxy dropwise under stirring condition Chloropropane, the molar ratio of epichlorohydrin to diethylenetriamine is 0.8:1, and the reaction time is 1.5h; finally add the terminator acetic acid, the molar ratio of acetic acid to diethylenetriamine is 1.8:1, and react for 1h Finally, polyamine shale inhibitors are prepared.