喻高明,张文昕
YU Gaoming,ZHANG Wenxin

• 1:长江大学石油工程学院

摘要(Abstract)：

稠油油藏热利用率的计算普遍为完全射孔的驱替理论模型,没有考虑不完全射孔因素的影响。运用热力学的基本原理和热平衡基础理论,在考虑不完全射孔因素和重力分异影响的基础上,推导了考虑不完全射孔因素的蒸汽驱储层热效率评价方法。研究表明:蒸汽驱初期,射孔影响较大,汽液重力分异作用影响较小,注入蒸汽沿储层射孔段的驱替效果明显,储层热散失率较少;蒸汽驱开采后期,随着蒸汽超覆作用的增强,射孔的影响相对减弱,蒸汽沿储层上部的驱替效果明显,储层热散失较大;部分射孔可有效缓解重力分异的不利影响,提高蒸汽波及效率。
The calculation of the thermal utilization factor in heavy oil reservoir is generally based on the displacing theoretical model with complete perforation,ignoring the influences of the incomplete completion.With the help of the general principle of the thermodynamics and basic theory of the heat balance,and moreover considering the perforation factors and gravitational differentiation influence,the evaluating method for the thermal efficiency is deduced for the steam flooded reservoir in the consideration of the incomplete perforation.The study results show that in the early stages of the steam flooding,the perforation ways have a great influence,the influence of the steam-fluid differentiation is pretty smaller,the displaced effects of the injected steam are greatly obvious along the reservoir perforated intervals,the heat loss ratio is favoritely less in the reservoirs;at the later stage of the steam flooding,with the rise of the steam override degree,the perforation effects become weak,the steam displaced results along the top of the reservoir are pretty obvious,so the heat loss is rather serious;the incomplete perforation can effectively reduce the unfavorable influences of the gravitational differentiation and furthermore enhance the swept efficiency of the steam.

关键词(KeyWords)： 注蒸汽;不完全射孔;热采;热利用率
steam injection;incomplete/partial perforation;thermal recovery/production;thermal utilization factor

Abstract:

Keywords:

基金项目(Foundation): 国家863项目“砂岩稠油油藏开发中后期剩余油分布规律研究”(2008ZX05024-004-012)

作者(Author): 喻高明,张文昕
YU Gaoming,ZHANG Wenxin

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