超稠油直井水平井组合蒸汽驱参数优化

发布时间：2018-04-01 06:29

  本文选题：风城油田重井区　切入点：超稠油　出处：《特种油气藏》2017年01期

【摘要】：针对风城油田重32井区蒸汽吞吐轮次高、周期产油量低、油汽比低等突出问题,建立直井水平井组合蒸汽驱典型井组的数值模拟模型,通过设置不同的参数组合方案,运用单因素法和正交实验法研究井网井距、转驱时机、注采参数等对生产效果的影响。分析结果表明,直井水平井组合蒸汽驱合理的开发技术参数为:直井与水平井井距为35 m;水平段位于直井井排中间;直井蒸汽吞吐8周期、水平井蒸汽吞吐2周期后转蒸汽驱;注汽速度为70 t/d;采注比为1.2;井底蒸汽干度大于0.7;井口Sub-cool(井口压力对应的饱和蒸汽温度与流体实际温度的差值)为10~20℃;直井连续注汽200 d后可转轮换注汽,注3个月停1个月。试验区转蒸汽驱后,日产油由63 t/d升至117 t/d,阶段油汽比由0.08升至0.19。研究成果可有效指导超稠油蒸汽驱现场动态调控,为后续技术推广提供理论支持与经验借鉴。
[Abstract]:In view of the outstanding problems such as high times of steam huff and puff, low periodic oil production and low oil / steam ratio in Fengcheng Oilfield, a numerical simulation model for typical well groups of horizontal well combination steam drive in straight well is established, and different parameter combination schemes are set up. Single factor method and orthogonal experiment method are used to study the effects of well spacing, timing of transfer drive and injection-production parameters on the production results. The reasonable development technical parameters of horizontal well combination steam flooding are as follows: the distance between straight well and horizontal well is 35 m, horizontal section is in the middle of vertical well row, steam huff and puff in vertical well is 8 cycles, steam huff and puff in horizontal well is 2 cycles and then steam drive is changed. The steam injection rate is 70 t / d; the production injection ratio is 1.2; the downhole steam dryness is greater than 0.7; the wellhead Sub-coolness (the difference between the saturated steam temperature corresponding to the wellhead pressure and the actual fluid temperature) is 1020 鈩，

本文编号：1694352