摘要
塔里木盆地哈拉哈塘油田为缝洞型碳酸盐岩油藏,缝洞之间连通关系复杂,不同缝洞单元原油饱和压力和流体性质存在明显差异。利用PVT资料的原始溶解气油比、饱和压力等数据,拟合出不同区块饱和压力的经验公式,其计算结果的准确度要高于国内外已有公式。利用求得的饱和压力和油藏目前压力,判断油藏是否进入溶解气驱阶段,并制定提前注水保压措施,为开发决策和提高采收率提供依据。
Halahatang oilfield in Tarim basin is a fractured-vuggy carbonate reservoir with complex communication between fracture and vug systems,in which the different systems have obvious differences in oil saturation pressure and fluid property.This paper presents the empirical formulas for oil saturation pressure calculation in the different blocks using the initial solution gas-oil ratio and saturation pressure data available in this oilfield.The calculated result shows that the accuracy given from these formulas is higher than that from those at home and abroad.Based on the calculated saturation pressure and the measured reservoir pressure data,whether or not a reservoir enters into a stage of dissolved gas drive can be determined,providing basis for maintaining the reservoir pressure by in-advance water injection process,rational development decision-making and EOR.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2014年第6期690-693,共4页
Xinjiang Petroleum Geology
基金
国家科技重大专项(2011ZX05004-004)
关键词
塔里木盆地
哈拉哈塘油田
气油比
饱和压力
溶解气驱
Tarim basin
Halahatang oilfield
gas-oil ratio
saturation pressure
dissolved gas drive
