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Analysis on Causes of Sulfur Deposition in Puguang Gas Field Surface Gathering and Transportation System and Countermeasures
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Key Words: Puguang Gas Field; Sulfur deposition; Acid separator; Sulfur solvent
Abstract: H2S and CO2 are rich in natural gas produced in Puguang Gas Field. Since the gas field was put into production, sulfur deposition is common in its surface gathering and transportation pipelines and equipment, which often results in too high pressure differential in acid separator, throttle plugging, impeded drainage and other issues and normal production of gas wells are affected directly. Field investigation and cause analysis are conducted on well P3011-1 with serious sulfur plugging. After applied is the sulfur solvent injection technology to inject sulfur solvent in the gas gathering station, the pressure differentials upstream and downstream of the acid separator recover to a normal value, sulfur deposition in downstream gathering and transportation pipelines and equipment disappears basically and quality of natural gas product is improved significantly. Successful application of the sulfur solvent injection technology will provide valuable reference for eliminating sulfur deposition in surface gathering and transportation pipelines and equipment of Puguang Gas Field and similar high sour gas fields.
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