临界产量Dupuit公式的讨论及一种新的方法

韩国锋; 陈方方; 刘曰武; 朱永峰; 马小平

doi:10.6052/0459-1879-15-043

临界产量Dupuit公式的讨论及一种新的方法

doi: 10.6052/0459-1879-15-043

1.
中国科学院力学研究所, 北京100190
2. 中国石油天然气股份有限公司塔里木油田分公司勘探开发研究院, 新疆库尔勒841000

详细信息

通讯作者:
刘曰武,研究员,主要研究方向:渗流力学及油气藏工程.E-mail:lywu@imech.ac.cn

中图分类号: TE34
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- 被引次数: 0
出版历程
- 收稿日期: 2015-02-03
- 修回日期: 2015-05-05
- 刊出日期: 2015-09-18

DISCUSSION ON DUPUIT FORMULA OF BOTTOM-WATER CRITICAL RATE AND A NEW COMPUTATIONAL METHOD

1.
Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
2. Research Institute of Exploration and Development, Tarim Oilfield Company, Petro China, Korla, Xinjiang 841000, China

摘要

摘要: 临界产量的确定对底水油藏的高效开发起着重要作用. 然而,临界产量Dupuit 公式反映临界产量随着打开程度的降低而单调增加,存在不合理的地方. 本文与一些学者的研究表明,Dupuit 公式推导过程暗含的“当临界状态时水锥正好处于井底” 的假设不合理,水锥不能稳定在井底位置. 在不作水锥到达井底的假设,假设油井上部为径向流,井底周围为半球形流动的情况下,推导出了一种新的底水临界产量方程. 算例与工程实例表明,该方法比较符合实际,能够求得临界水锥高度和对打开程度进行优化.
- 底水油藏 /
- 底水锥进 /
- 临界产量 /
- Dupuit 公式 /
- 临界水锥
Abstract: The determination of critical rate is a key issue of high-efficient development of bottom-water reservoirs, while in the Dupuit formula of bottom-water reservoirs' critical rate, it is unreasonable that the critical rate monotonously increase with the reduction of perforating level. In fact, checking the derivation process of Dupuit formula, there is an implied condition that the top of water cone just at the well bottom. However, it is found that it can't keep a stable water cone at well-bottom when producing with the critical rate computed by Dupuit formula. In the paper, a new computational method has been established without the assumption of water-cone top at well bottom. It assumes that it is a kind of radial flow at the upper and a kind of hemispherical flow at the lower around the well bottom. The example shows that the new method could optimize the perforating level and gain the critical water-cone height. The project case demonstrates that the method gained in this study is more correspond to reality.
- bottom-water reservoir /
- bottom-water coning /
- critical rate /
- Dupuit formula /
- critical water coning

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