关键词: 辽河油田, 稠油油藏, 二氧化碳, 蒸汽吞吐工艺, 参数, 热力学特性, 数值模拟

Abstract: The steam-carbon dioxide-auxiliary agent huff and puff technology was applied to heavy oil development of Du-84 Block.The mechanism of steam-carbon dioxide-auxiliary agent huff and puff technology was discussed.The thermodynamic properties of heavy oil including solubility and viscosity were determined with the empirical methods.The production rate and recovery factor obtained by carbon dioxide huff and puff technology were compared with those by the conventional steam huff and puff method and analyzed by numerical simulation.In accordance with the real situation of Du-84 Block,carbon dioxide huff and puff parameters were analyzed,and the proper steam injection pressure,steam injection rate and operation processes were determined.The statistics of operation effectiveness show that carbon dioxide huff and puff technology can increase the rate of oil production significantly and may be the economic and effective technique for production of heavy oil and high pour point oil.

Key words: Liaohe Oilfield, heavy oil reservoir, carbon dioxide, steam huff and puff technology, parameters, thermodynamic property, numerical simulation