期刊文献+
共找到3篇文章
< 1 >
每页显示 20 50 100
煤层气水平井排采设备适应性及应用效果评价
1
作者 胡海洋 冯云飞 +3 位作者 陈捷 高为 李全中 杜志刚 《洁净煤技术》 CAS CSCD 北大核心 2024年第S01期696-700,共5页
针对贵州省煤层气水平井开发案例较少的现状,开展煤层气水平井排水采气工艺适配性研究及应用效果评价。以六盘水煤田水平井为例,分析该井井斜、压裂规模对排采设备排水采气的影响,并进行设备适应性分析,优选射流泵作为该井的排采设备。... 针对贵州省煤层气水平井开发案例较少的现状,开展煤层气水平井排水采气工艺适配性研究及应用效果评价。以六盘水煤田水平井为例,分析该井井斜、压裂规模对排采设备排水采气的影响,并进行设备适应性分析,优选射流泵作为该井的排采设备。结果表明:煤层气水平井的复杂工况会影响排采设备的适应性,需根据水平井的工况复杂性优选匹配的排采设备;采用射流泵进行煤层气水平井排水采气,能够满足水平井连续稳定排采的要求;对射流泵井下管柱及下泵深度进行优化,增大沉砂沉粉井段,采取“S”型产出流道分离气水流体,能够有效避免泵筒卡泵及气锁现象。该水平井的开发实践及应用效果,为贵州省煤层气水平井的排水采气设备优选及管柱优化提供了工程借鉴。 展开更多
关键词 煤层气 水平井 压裂规模 排采设备 效果评价
下载PDF
New Synthesis of (±)Shikalkin
2
作者 haiyang QianLI 《Chinese Chemical Letters》 SCIE CAS CSCD 2002年第6期515-518,共4页
The new synthetic route of (±)shikalkin 1 was developed. 3-(1-Hydroxy-4-methyl-3- pentenyl)-5, 8-dimethoxy-1-naphthol 8 was obtained from compound 3 in 10 steps. Then (±)shikalkin 1 was synthesized from 8 i... The new synthetic route of (±)shikalkin 1 was developed. 3-(1-Hydroxy-4-methyl-3- pentenyl)-5, 8-dimethoxy-1-naphthol 8 was obtained from compound 3 in 10 steps. Then (±)shikalkin 1 was synthesized from 8 in one step with reagents AgO/HNO3 in 1, 4-dioxane. 展开更多
关键词 Shikalkin synthesis.
下载PDF
A MODIFIED VARIABLE-PENALTY ALTERNATING DIRECTIONS METHOD FOR MONOTONE VARIATIONAL INEQUALITIES 被引量:3
3
作者 Bing-shengHe Sheng-liWang haiyang 《Journal of Computational Mathematics》 SCIE CSCD 2003年第4期495-504,共10页
Alternating directions method is one of the approaches for solving linearly constrained separate monotone variational inequalities. Experience on applications has shown that the number of iteration significantly depen... Alternating directions method is one of the approaches for solving linearly constrained separate monotone variational inequalities. Experience on applications has shown that the number of iteration significantly depends on the penalty for the system of linearly constrained equations and therefore the method with variable penalties is advantageous in practice. In this paper, we extend the Kontogiorgis and Meyer method [12] by removing the monotonicity assumption on the variable penalty matrices. Moreover, we introduce a self-adaptive rule that leads the method to be more efficient and insensitive for various initial penalties. Numerical results for a class of Fermat-Weber problems show that the modified method and its self-adaptive technique are proper and necessary in practice. 展开更多
关键词 Monotone variational inequalities Alternating directions method Fermat-Weber problem.
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部