考虑表皮的水平井与油藏耦合渗流研究
Research on Coupling Seepage between Horizontal Well with Non-uniform Skin Consideration and Reservoirs
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- 引用格式:
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冉兆航,何顺利,刘一睿.考虑表皮的水平井与油藏耦合渗流研究[J].天然气与石油,2013,31(4):0.doi:
.Research on Coupling Seepage between Horizontal Well with Non-uniform Skin Consideration and Reservoirs[J].Natural Gas and Oil,2013,31(4):0.doi:
- DOI:
- 作者:
- 冉兆航 何顺利 刘一睿
- 作者单位:
- 中国石油大学（北京）石油工程教育部重点实验室
- 关键词:
- 水平井；表皮；非均匀性；耦合；井筒压力；径向流入量
Horizontal well； Skin； Non-uniform； Coupling； Wellbore pressure； Radial inflow
- 摘要:
- 水平井表皮因子沿井段非均匀分布，改变了水平井与油藏间的耦合渗流。根据水平井生产段表皮因子的沿程分布模式，建立了考虑非均匀表皮时的耦合模型，分析非均匀表皮对耦合渗流过程的影响，结合实例对耦合模型求解。结果表明：考虑表皮时，水平井井筒压力升高，径向流入量降低；由于表皮非均匀性，沿指端向跟端，井筒内压力升高幅度越大，径向流入量降低越明显；分别将表皮按非均匀分布和均匀分布计算，前者所得沿程井筒压力更低，径向流入量更大，且越靠近跟端，两者差别越大；考虑非均匀表皮能反映水平井实际渗流情况，产量计算结果更准确。
Non-uniform distribution of horizontal well skin factors along well section changes the coupling flow between horizontal well and reservoir. Established is a mathematical model of the coupling flow between horizontal well with non-uniform skin consideration and reservoirs according to non-uniform distribution of horizontal well skin factors along well section，analyzed are effects of non-uniform skin on the coupling flow and solved is the model through an example. The results show that skin factors will result in horizontal wellbore pressure increase and radial inflow decrease. Due to the non-uniformity of the skin，the wellbore pressure near the root of horizontal well is higher and its radial inflow decrease is more apparent. The wellbore pressure of the skin with non-uniform distribution is lower than that with uniform distribution and its radial inflow is more than the latter and the difference is more apparent near the root. Consideration of non-uniformity of skin can reflect the actual flow and the accumulated production is more accurate.
