Results 11 to 20 of about 5,722 (144)
Research and application of pressure relief technology for fracturing thick hard roof in super-high mining face [PDF]
Aiming at the problems of super-large mining space, strong ore pressure and ultra-high coal wall stability control faced by full-mechanized mining face with ultra-large mining height and thick hard roof, this paper takes the 122104 working face of ...
Futang ZHAO +11 more
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Experimental on N2 foam fracturing characteristics of tight siltstone in coal measures [PDF]
Foam fracturing with low water consumption, low reservoir damage and high flowback efficiency is one of the potential technologies for the development of low-pressure, low-permeability and strong water-sensitive coal measures reservoirs.
Hecheng XIAO +4 more
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Research progress,key scientific issues,and prospects of segmented fracturing and pressure relief gas drainage technology for coal seam roof horizontal wells [PDF]
The segmented fracturing and pressure relief gas drainage technology in the horizontal well of the coal seam roof is a key means to guide the efficient gas extraction in deep, high gas, soft and low permeability coal seams.Based on this, a full lifecycle
Caiqing LI +7 more
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An Intelligent Fluid Discharge Control System for Oil-Well Fracture [PDF]
, 2003 油井压裂是石油生产中采取的一种增产措施。压裂后放喷也叫压裂液返排，是压裂施工后所必须经过的一个环节。实践表明，返排程序不合理，会导致支撑剂回流，出现吐砂情况，影响压裂效果。多年来，支撑剂的回流一直是人们所关心的问题，对此也提出了多种方法，总的共识就是要有规律地控制返排速度。而目前仅依靠人工经验控制返排速度，难以实现连续有规律的放喷。 本文根据以上实际情况设计了一套用于油井放喷的智能监测与控制系统，使压裂液能够按照一定的流量规律返排，避免人工控制返排速度中带来的诸如压力激动、吐砂等弊端 ...
卞剑涛
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Engineering practice of advance gas control for crushed soft coal seams through directional fracturing using a long borehole in the coal seam roof [PDF]
Objective and MethodsThe crushed soft coal seams susceptible to intense coal and gas outbursts exhibit high gas content and pressure. Consequently, during borehole drilling for regional gas pre-drainage in such coal seams, high blowout intensity is prone
Bingyi JIA +3 more
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Gaoya dianqi, 2019 介绍了中国油气开采工程中使用的各种压裂技术优缺点,根据工程需要提出了电弧压裂技术,分析了电弧压裂技术的工作原理以及国内外研究现状,并对目前电弧压裂工程应用进行了分析,总结了电弧压裂技术对油气储层的适用性。根据目前电弧压裂装置深井下高温高压的作业难点,并提出了井下压裂工具改进的实施方案和大面积储层改造的思路,为电弧压裂技术的发展提供工程应用参考。
鄢宇杰 +4 more
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Multi-scale analysis of fracturing characteristics of coalbed methane wells in Tunlan Block [PDF]
In order to explore the fracturing characteristics of coalbed methane wells in the Tunlan block, the No.2 coal seam in the Tunlan block, Xishan, Taiyuan was taken as the research object.
Hongyu LI +5 more
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Shiyou jixie, 2012 水平井分段压裂技术是水平井增产改造的重要技术。该技术可在第1层压裂结束后，投球加压，使滑套下移，将下面一层关闭，露出第2层喷砂循环孔，开始第2层压裂，实现不动管柱多层压裂。在介绍水平井分段压裂技术关键工具结构及性能的基础上，以水平5-1井为例，对该技术的应用情况进行了介绍。应用结果表明，封隔器分段压裂技术分段准确、施工方便，对开发低渗透油藏具有良好效果。建议进一步开展压裂工具的优化设计和不动管柱封隔器分段压裂技术研究。
孙骞 +4 more
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Shiyou jixie, 2014 对压裂球进行受力分析和地面承压测试是开发高性能压裂球的关键。采用有限元数值模拟方法对压裂球进行了受力分析，研究了不同压力对压裂球内应力和塑性变形区域的影响规律，并通过承压试验测试了压裂球的承压性能。为了模拟真实的密封过程，选择显式动力方法定义分析步，在整个过程中认为球座无变形。分析结果表明，压裂球在不同压力载荷下的应力集中区域为球与球座接触区，随着压力的增大，应力集中区和塑性变形区逐渐向球心延伸；当压力超过110 MPa时，压裂球最大应力值已经接近材料的应力极限。
左争云 +3 more
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Shiyou jixie, 2012 压裂机组辅助配套装备是大型施工作业的重要组成部分。在介绍大型压裂施工作业辅助配套状况的基础上，指出了压裂施工辅助装备研发技术方案，包括配液及配酸装备、储液系统、储砂和供砂装备、供液和供酸装备及地面高低压连接管汇。最后从整体配套方案、集群控制方案及安全与环境保护方案等3方面介绍了辅助装备与压裂机组的集成配套。研究压裂机组辅助配套装备的集成配套将对提升我国压裂设备制造及压裂工艺的创新力有积极作用。
吴汉川, 仇黎明
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