摘要
以大庆油田某区块特低渗透油藏为例,通过开展地层原油注空气细管驱替试验,在不同压力、不同温度条件下对气油比、采收率以及地层原油与空气低温氧化产出油气流体组分含量进行测定,获得了驱油效率、气油比与空气注入孔隙体积倍数以及驱油效率与驱替压力的关系曲线,研究了空气驱地层原油的混相特征与驱替效果。试验结果表明,地层原油注空气难以达到混相。氧化升温后原油的流动性变好,采收率上升较明显。
By taking low permeability reservoir in a block of Daqing Oilfield for example,through experiment of air injection into crude oil,the gas-oil ratio,oil recovery rate and composition of produced fluid in low temperature oxidation were detected under the conditions of different pressures and temperatures,by which the displacement efficiency,gas-oil ratio and the injection volumetric multiple and the correlation curve between the displacement efficiency and displacement pressure were obtained,the displacement characteristics and effect of air injection were studied.The experiment results show that it is difficult to realize miscible displacement when air is injected into the reservoir.After oxidation and temperature rising oil fluidity is better and recovery ratio rises visibly.
出处
《石油天然气学报》
CAS
CSCD
2013年第2期143-145,1,共3页
Journal of Oil and Gas Technology
基金
国家科技重大专项(2008E-1222)
关键词
低渗透油气藏
空气驱
细管
最小混相压力
气油比
采收率
低温氧化
low permeability gas reservoir
air injection
slim tube
minimum miscible pressure
gas-oil ratio
oil recovery
low-temperature oxidation
