Research On Synthesis And Application Of Desulfurization Agent Dissolved In Oil

H₂S is a toxic gas, which can cause serious harm to human body. As far as the oilindustry is concerned, H₂S is widespread and it’s harmful for the lives of occupationallyexposed workers. It can cause the gathering system corrosion, threatens every link ofdrilling and production process, even endanger the health of workers in the oil field. FanJiachuan work area occupies a very important position in Changqing Oilfield, the morewith Fan Jiachuan work area yield increases, the more serious hazards of hydrogensulfide.Fan Jiachuan produced crude oil moisture content analysis showed that the watercontent in4.4¹0%. According to the characteristics of the low rate of water content inthe Fan jiachuan Oilfield，three kinds of oil-soluble M series desulfurization agent issynthesized. The desulfurizing agent synthesized by certain proportion is mainlycomposed of organic solvent，ethanol and N-Methyldiethanolamine （MDEA）. The testresults of the desulfurization properties of M show that hydrogen sulfide gas can bestably absorbed in30min when the desulfurizer apparent sulfur capacity up to2mg/L ofthe hydrogen sulfide. Field application results show that the M series desulfurizationagent had no effect on the properties of crude oil demulsification, contribute to thecrude oil paraffin and less corrosion to equipments.In order to reduce the rapid diffusion of hydrogen sulfide gas produced bythermochemical and effectively increase the absorption performance of desulfurizationagent, the well fluid simulation reactor is established. In the water and the oil mediumconditions, through the experimental methods of tracer desulfurizer flow，research theM series motion desulfurizing agent in oil wells and the diffusion condition, analysis and evaluation of the desulfurization agent in the desulfurization effect of differentposition of the well.According to the movement of desulfurizer in the well diffusionrules，presents periodic excessive dosing methods for the field hydrogen sulfide gastreatment and desulfurization agent addition method is scientific and reasonable andprovides a theoretical basis.According to the motion law of oil soluble desulfurizing agent in oil wells,167well area including washing, workover and normal operation of the32wells of thedesulfurization absorption experiment in the Fan Chuan. The results show that hydrogensulfide concentrations were reduced to below10mg/m3. The new desulfurizer removalof hydrogen sulfide can make hydrogen sulfide gas in the system to achieve "workplaceharmful factors of occupation contact limiting value"（GBZ2-2002） requirements，fullyproved the feasibility study of new desulfurization agent synthesized, provide technicalsupport and implementation model for the Changqing oilfield production safety.