鲁2块超深层稠油油田注水开发可行性研究

THE WATERFLOODING FEASIBILITY IN BLOCK LU2, A ULTRA-DEEP HEAVY OIL FIELD

吐玉克油田为超深层稠油油田,油藏埋深达到2200～3450m,地层原油粘度达到150-526毫帕秒,在前期室内物理模拟对水、蒸汽、化学剂段塞、二氧化碳段塞、天然气段塞和烟道气段塞驱油效率的评价和筛选的基础上,对开发试验区鲁2块利用CMC数值模拟软件进行了注水开发、天然气驱和水(天然)气段塞驱的优化设计,并通过不同开发方式开发效果的比较,表明注水开发是目前经济技术条件下鲁2块唯一可行的开发方式,优化后的最佳开发方式为衰竭式开发一年后转注水。

Tuyuke oilfield is a ultra-deep heavy oil field, where the reservoir burial depth reaches 2200m to 3450m,and the in-situ crude viscosity ranges from 150mPa. s to 526mPa. s. The oil displacement efficiency of waterflooding, steam, chemical agent slug, CO_2 slug, natural gas slug and flue gas slug injection was evaluated through physical modeling in laboratory. Then optimization design of waterflooding, natural gas and water-alternate-gas injection for the pilot Block Lu2 was carried out by use of CMG numerical simulation software. It was shown through comparison that waterflooding was the only feasible development scheme under the current economic and technical situation. and the optimal development scheme was waterflooding after a year of natural depletion.