|
|||||
|
|
| 气体钻水平井井径扩大环空流动特征的数值模拟 | |
| 引用本文： | 万里平,孟英峰,魏纳,金雪梅,李孝军,张华. 气体钻水平井井径扩大环空流动特征的数值模拟[J]. 应用力学学报, 2011, 28(5) |
| 作者姓名： | 万里平 孟英峰 魏纳 金雪梅 李孝军 张华 |
| 作者单位： | 1. 西南石油大学“油气藏地质及开发工程”国家重点实验室,成都,610500 2. 川庆钻探安全环保 质量监督检测研究,广汉,618300 3. 西南油气田分公司蜀南气矿,泸州,646001 |
| 基金项目： | 国家自然科学基金(50974106) |
| 摘 要： | 由于气体钻水平井中岩屑受力状态与直井有很大不同，特另0是遇到井径扩大，更是携岩的关键点。因此，在分析了气体钻水平并岩屑运移特点以及建立环空连续性方程和动能方程的基础上，以实际并为例考虑了不同井径扩大率，数值模拟了其扩径段气固两相的流动状态，包括气固速度、岩屑浓度、压力分布等。研究结果表明：气体在经历扩径段时环空压力有个降落又回升的过程，随着井眼扩径系数的增大，压力下降又回升，所经历的长度会逐渐增长；扩径系数大于一定值时，扩径变径处存在一定区域的零流动区；扩径系数越大，低速区和回流区就越大越长，扩径下部区域越容易堆积岩屑，填充井眼。 |
| 关 键 词： | 气体钻水平井 井径扩大 关键点 气固两相流动 |
Numerical simulation on the annulus diameter expansion in gas drilling horizontal well |
|
| Wan Liping Meng Yingfeng Wei Na Jin Xuemei Li Xiaojun Zhang Hua. Numerical simulation on the annulus diameter expansion in gas drilling horizontal well[J]. Chinese Journal of Applied Mechanics, 2011, 28(5) | |
| Authors: | Wan Liping Meng Yingfeng Wei Na Jin Xuemei Li Xiaojun Zhang Hua |
| Affiliation: | Wan Liping1 Meng Yingfeng1 Wei Na1 Jin Xuemei2 Li Xiaojun1 Zhang Hua3(State Key Laboratory of Oil and Gas Geology and Exploration,Southwest Petroleum University,610500,Chengdu,China)1(Chuan Ching Drilling Safety and Environmental Protection Quality Supervision and Testing Institute,618300,Guanghan,China)2 (ShuNan Branch of Southwest Gas Field,646001,Luzhou,China)3 |
| Abstract: | The stress state of the gas drilling horizontal wells is very different from that of vertical wells,especially in face of hole enlargement,so it is the key point for carrying rocks.In this paper,the annular continuity equation and the momentum equation are established.Taking the actual well as an example,different hole enlargement rates are considered,the expanding gas-solid flow state is numerically simulated.The results show that: when passing through the gas annulus,the gas pressure experiences a descend... |
| Keywords: | gas drilling horizontal well hole enlargement key points gas-solid flow. |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |