原油中含氮化合物分布特征与储层连通性研究

Distribution features of nitrogen compounds in crude oil and reservoir connectivity

从油藏地球化学角度出发,以临邑洼陷夏502块沙三下段、商546块东二段和大芦家区块馆二段为例,运用含氮化合物分布特征与传统全油色谱指纹技术进行油藏储层和流体连通性的对比研究。研究表明:同一井区范围内如果原油含氮化合物参数分布特征相似,则油藏和流体连通性好,反之则连通性较差;含氮化合物较色谱指纹抗生物降解能力强,更适合于对遭受生物降解的油藏连通性进行预测;在预测储层连通性时,含氮化合物的精细识别和可鉴定特征可用于不同学者之间重复性和对比性的研究。

Based on the reservoir geochemistry theory and taking the lower third member of Shahejie formation in Xia 502 block, the second member of Dongying formation in Shang 546 block and the second member of Guantao formation in Dalujia block in Linyi sag as examples, the reservoir and fluid connectivity were researched by using traditional oil chromatographic fingerprint and nitrogen compounds distribution technologies. The results show that the similar distribution characteristics of crude oil nitrogen compounds reveal a good connectivity between different reservoirs and fluid in the same well field, on the contrary, the connectivity is poor. Because of the high ability to resist biodegradation, nitrogen compounds distribution is more suitable to predict the connectivity of reservoirs biodegraded in some degree. The fine recognition and identification characteristics of the nitrogen compounds can be used for the repeated and comparative analysis on the reservoir connectivity for different scholars.