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- Title
水下增压泵在陆丰22-1 油田的应用研究.
- Authors
刘飞龙; 陈文峰; 曾树兵; 李伟; 邢天健
- Abstract
To efficiently develop marginal and deep-water oil and gas fields, subsea boosting has emerged as one of the crucial techniques in offshore oil and gas field development. The Lufeng 22-1 oilfield, characterized by a high water cut and low wellhead pressure, is undergoing secondary development for enhanced oil recovery. To maximize the utilization of its remaining reserves and enhance its commercial value, a subsea production system (SPS) approach has been adopted. This involves pressurizing the wellhead fluid using a subsea booster pump before transporting it to the platform for processing. In this study, the OLGA software is used to develop a fluid transport model from the subsea wellhead to the platform specific to the Lufeng 22-1 oilfield. Simulations were initially conducted for two operating scenarios: a single subsea pipeline and a dual subsea pipeline configurations. The findings indicate that, with the dual subsea pipelines in operation, the subsea booster pump operates optimally in its operating envelop, and the fluid temperature remains above the crude oil's freezing point. Conversely, when the flowrate drops below 300 m³ /h in the single subsea pipeline operation, the booster pump's operating point deviates from the optimal range of the operating envelop. Subsequent dynamic simulations of online pigging for the dual subsea pipelines were performed by modulating the speed of the subsea booster pump. The results revealed that when the pig is launch by a 200 m³/h production water flow from the platform into the first subsea pipeline, the flowrate at the subsea wellhead should be capped at 420 m³/h. Once the pig navigates through the first subsea pipeline, the injection of production water should cease, allowing the subsea wellhead to revert to its standard production rate. The entire online pigging process of the dual subsea pipelines takes approximately 11.4 hours. The research results provide significant guidance on the application of subsea booster pumps to address flow assurance issues in deep-water oil and gas fields.
- Publication
Natural Gas & Oil, 2023, Vol 41, Issue 5, p16
- ISSN
1006-5539
- Publication type
Article
- DOI
10.3969/j.issn.1006-5539.2023.05.003