注N_2对原油性质及组成的影响研究  

Study on Effect of Nitrogen Injection on Oil Properties and Composition

作　　者：杨利萍[1] 巫光胜[1] 王建海[1] 

机构地区：[1]中国石化西北油田分公司工程技术研究院,新疆乌鲁木齐830011

出　　处：《辽宁化工》2014年第5期569-572,共4页Liaoning Chemical Industry

摘　　要：对注N2后原油性质及组成变化进行分析研究,研究表明地层注入N2较难达到混相,属于非混相驱;注气后饱和压力上升快,原油体积系数增加,但增加量逐渐变小,依靠氮气增溶驱油的效果受到一定影响;N2对原油中轻烃组分有一定的抽提作用,导致原油变重,可能会形成沥青质沉淀而影响原油的流动能力。Effect of nitrogen injection on oil properties and composition were studied. The results show that, it is difficult to achieve miscible aRer injecting N2; the saturation pressure rises quickly after gas injection, oil volume factor increases, but the increment gradually becomes small, so effect of the nitrogen displacement is affected in a certain; N2 has extraction effect on light hydrocarbon in oil to a certain extent, which can make crude oil become heavier, it may affect crude oil flow ability because of asphaltene precipitation.

关 键 词：稠油油藏 注氮气 非混相驱 原油性质 

分 类 号：TE133[石油与天然气工程—油气勘探]