摘要
考虑到传统单管蒸汽注入模型的局限性,利用热传递理论,建立平行双管稠油水平井的井筒参数计算模型以及蒸汽回流模型,并采用节点分析方法进行求解。采用蒸汽回流模型对水平段封隔器的封隔情况进行了模拟,从而对稠油双管注汽水平井的实际验封过程进行分析。结果表明:与传统的单管蒸汽注入方式相比,平行双管注汽具有明显的优势,与单管注蒸汽过程相比,双管注汽可以提高注汽井井底蒸汽干度0.1以上。平行双管注汽的井筒沿程蒸汽参数与双注汽管的注汽方式、注汽参数以及管柱尺寸等有较大关系,井口蒸汽干度与注汽速率对井筒热损失程度影响较大;双管注汽的井筒蒸汽干度主要损失于水平段,主注汽管水平段管柱的尺寸应尽可能的小。
Based on the heat conduction theory, momentum conservation and energy conservation law, the computation model of steam properties of parallel-tubing in the thermal horizontal wells is established. Also the model of sealed checking of packer in horizontal segment is proposed. The models are solved with the method of node analysis. Through the flow computation of steam at the conditions of valid and invalid sealing states, the sealed checking process of packer in the parallel-tubing horizontal well is analyzed. The results indicate that the influences of steam injection method and injection parameters are significant, especially the well-head steam quality and the steam injection rate. Compared with single-tube, the steam quality of well-bottom of the parallel-tubing injection could be improved by above 0.1.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2014年第3期939-945,共7页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(51274212)
关键词
稠油油藏
水平井
平行双管
热损失
压力验封
heavy oil reservoir
horizontal wells
parallel tubing
heat loss
sealed checking of packer
