春光油田超稠油井筒降黏技术应用分析

春光油田超稠油在采油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。为解决春光油田超稠油井筒举升技术难题,介绍了近几年在春光油田应用的套管掺蒸汽降黏、空心杆电加热、井筒乳化降黏和套管掺稀降黏等工艺的降黏原理,综合分析和评价了各种降黏工艺的降黏效果,经过工艺优化,建立了"以套管掺稀降黏为主体,以边远井电加热、载荷异常井乳化降黏为辅助"的井筒降黏工艺技术体系,满足了春光油田超稠油生产的需要。。

Application analysis of wellbore viscosity reduction technology of super heavy oil in Chunguang oilfield

In the process of super heavy oil recovery in Chunguang oilfield, with the decreased temperature of wellbore, the viscosity of crude oil was constantly increasing, the flowability became worse and the difficulty in wellbore lifting became bigger. To solve the problems in wellbore lifting of super heavy oil recovery in Chunguang oilfield, the technique principles were introduced, such as the casing with steam for viscosity reduction technique, the hollow rod electric heating technique, the casing with emulsion and the casing with diluting for viscosity reduction technique. Through a comprehensive analysis and evaluation of different viscosity reduction techniques, after process optimization, a wellbore viscosity reduction technology system, namely ‘casing with diluting as the priority, remote well electric heating and the casing with emulsion for load abnormal wells as the minority', which satisfied the production needs of super heavy oil recovery in Chunguang oilfield.