摘要
稠油在举升过程中随着井筒温度的降低,原油黏度不断上升,流动性变差,举升难度变大.掺稀能降低井筒原油黏度,有效减小举升摩阻,是井筒降黏的常用工艺.根据春光油田现场掺稀降黏工艺流程,建立稠油降黏井筒流动室内评价装置,模拟了套管掺稀举升过程中稠稀油的动态混合过程;实验测定了管流阻力的随注入速度及含水率在不同温度条件下的变化特征,模拟了不同掺稀比例条件下的黏度变化和降黏率,形成了一套油井产液量与出油温度、掺稀比例对应关系图版,为井筒掺稀降黏工艺的现场应用提供了依据.
During the lifting process, with the decrease of wellbore temperature, the viscosity of crude oil increases continuously, the fluidity becomes poor and the lifting becomes more difficult. Dilution can reduce the viscosity of wellbore crude oil and effectively reduce the lift friction, which is a common process for wellbore viscosity reducing. According to the process flow of in-situ mixing of light and heavy oil in Chunguang oilfield, an indoor evaluation device for heavy oil wellbore flow was established to simulate the dynamic mixed process of light and heavy oil in the process of casing mixed with light and heavy oil. Through the experiment,the change characteristics of the injection rate and water cut of the casing flow resistance under different temperature conditions were measured, the viscosity change and viscosity reducing rate under different mixing ratios were simulated, and then a set of corresponding diagrams of the relationship between oil production volume and oil production temperature and dilution ratio was formed, which provided a basis for effectively guiding the field application of wellbore dilution viscosity reducing process.
作者
马海
MA Hai(Petroleum Engineering Research Institute of Henan Oilfield Company,SINOPEC,Nanyang,Henan 473 1 32,China)
出处
《石油地质与工程》
CAS
2019年第3期90-93,共4页
Petroleum Geology and Engineering
关键词
春光油田
稠油开发
降黏工艺
流动特征
Chunguang oilfield
heavy oil development
viscosity reduction process
flow characteristics
