PURIFICATION OF ASSOCIATED PETROLEUM GAS WITH HIGH HYDROGEN SULFIDE CONTENT ON THE EXAMPLE OF FIELD X

Abstract

Relevance. The fluids of the deposits in the Russian Federation have high content of sulfur-containing compounds, in particular, hydrogen sulfide. Due to this feature, many gas and oil companies lose revenue from the sell of such hydrocarbons. The content of hydrogen sulfide in the fluid at the X field is above 5 wt. %. At the moment, associated petroleum gas is supplied at the gas processing plant at a cost of 2400 rubles per 1000 m3, as a result of which the economic efficiency of the project under consideration decreases. To solve this problem, it is proposed to build an associated petroleum gas treatment unit to meet the requirements of the standardization system of PJSC «Gazprom» (STO Gazprom) «Fuel, natural gas supplied and transported through main gas pipelines» (089-2010) as part of the reengineering of an oil and gas treatment facility, which will allow selling associated petroleum gas at a price of 4500 rubles for 1000 m3. Purpose: to form a concept for increasing the profitability of the project of reengineering using the proposed solution for the purification of associated petroleum gas from hydrogen sulfide and the production of sulfur from acid gas. Methods: search and analysis of the advantages and disadvantages of gas purification technologies, simulation of the selected technology in the Hysis software for a certain capacity and obtaining a material balance for plant design. Results. Gas preparation includes separation, a unit for absorption purification of associated petroleum gas from hydrogen sulfide and carbon dioxide by amines, a unit for adsorption gas dehydration for the extraction of mercaptans and drying with NaX (13X) zeolites, and a unit for the extraction of elemental sulfur. Conclusions. In the course of modeling, an amine gas purification scheme was obtained with material balance parameters consistent with the requirements of the standardization system of PJSC «Gazprom» (STO Gazprom) «Fuel, natural gas supplied and transported through main gas pipelines» (089-2010). The resulting gas is recommended to be admitted into a single gas supply system. Acid gases are utilized using a simulated Claus plant.

Keywords

• sour gas
• amine gas treatment
• reengineering
• gas treatment unit
• clause unit
• hysis software modeling
• project economic efficiency improvement