Results 81 to 90 of about 6,092 (204)
Shiyou jixie, 2012 采用传统的压裂监测技术测得的井口压力和温底很难反映井底的真实情况。鉴于此，研究了井下压裂实时监测技术，并配套研制了实时监测系统和压裂实时解释处理软件。实时监测系统将承载着监测仪的监测管柱下入目的层，在井底直接测得压力和温度数据，避免了通过井口数据折算至井底时由于井筒摩阻系数、井筒液体密度变化和泵压不稳定等因素产生的误差，因此分析的准确性大大提高；解释处理软件可对测量数据进行解释评价，以此来反映目的层真实信息及压裂效果。井下压裂监测技术在中原油田得到了广泛应用，分别在濮城老区和内蒙探区监测施工50余井次 ...
刘雪梅 +4 more
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Shiyou jixie, 2012 在介绍水平井裸眼完井分段压裂工艺的基础上，分析了苏里格水平井裸眼分段压裂工艺管柱结构。水平井裸眼完井分段压裂工艺在苏里格气田遇到的主要问题是压裂管柱下入遇阻严重、回插管柱密封性能、丢手丢开困难、压后返排率不高、压差滑套打不开及砂堵等。对管柱下入遇阻严重问题设计了Φ151 mm×1.5 m的大铣柱，与小铣柱配合使用，建议在较长的油管段接扶正器；对回插管柱密封问题设计了模块式密封；在悬挂封隔器上端设计丢手工具可解决丢手丢开困难问题；设计了压差滑套辅助压力阀解决滑套打不开问题。应用结果表明 ...
朱正喜, 李永革
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Study on technology and effect of gas extraction in horizontal well with segmental hydraulic fracture in roof of coal seam in Huainan mining area [PDF]
Huainan mining area is a typical high-gas area, with broken soft coal seam, low permeability, high gas content, and difficulty in extraction. In order to probe into the technical feasibility and gas control effect of the horizontal well for segmental ...
Benliang CHEN +7 more
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Mechanisms and collaborative prevention and control techniques for various disasters in coal seam roofs [PDF]
ObjectiveThe multistage sedimentary and tectonic evolution of coal seams in China has led to the formation of environments with the coexistence of multiple disasters including gas outbursts, water inrushes, and rock bursts. To address the chain evolution
Dongdong CHEN +4 more
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Efficient and variable viscosity fracturing fluid of deep coal rock gas and popularization in ultimate volume fracturing [PDF]
Limit volume Fracturing Technology is the effective means to achieve high yield industrial flow for deep coal rock gas, on the basis of this technique, fracturing fluid is the key to fully “Breaking” coal seam, establish filling sand complex crack ...
Bo LIN +7 more
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Dianci bileiqi, 1997 根据避雷器用ZnO压敏电阻在2ms方波作用下出现的炸裂失效现象，研究了压敏电阻炸裂区域的显微形貌特征以及伴随着炸裂而出现的电弧烧蚀针孔。并对出现多个烧蚀针孔的区域，。做了岩矿相组织分析，进一步证实了；对于高电压梯度，细晶粒组织的ZnO压敏电阻，2ms方波炸裂失效模式仍然是电弧烧蚀针孔击穿机理的一种。同时还指出了Eda模式和试验现象之间的矛盾。
陈小川
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Zhejiang Daxue xuebao. Lixue ban, 2010 设计的生物质与聚合物共裂解工艺,共裂解产物中C3-C4烃成分占气态烃类的大部分,为可燃气的开发提供理论基础.从生物质与聚合物共裂解产物中气态烃类的分布可见：生物质与聚合物常压共裂解气体转化率更高；相对生物质与聚合物高压无氧共裂解, C1和C2烃类生成相对减少,常压共裂解有利于C3和C4烃烃类的生成,占总气态烃的64.6%(质量比).将毛细管柱与氢火焰离子化检测器(FID)联用,研究了生物质与聚合物共裂解产物中气态烃类的气相色谱分析.通过控制分析条件,有效地使各类烃获得有效的分离.柱温：程序升温 ...
CUIYan-li(崔艳丽) +4 more
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Key technologies for supporting ultra large section tunnels and the evolution law of mining induced stress [PDF]
In response to the problem of controlling the deformation of surrounding rock in ultra large cross-section tunnels, taking the mining roadway of the ultra high mining face in Caojiatan Coal Mine as the research background, the distribution law of the ...
Jianchao REN +6 more
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Earth Science-Journal of China University of Geosciences, 2023 Ting-Kai Jiang +6 more
semanticscholar +1 more source