Results 81 to 90 of about 5,839 (163)
Commingling production of deep coal-measure gas through hydraulic fracturing: Propagation patterns of induced fractures and their determinants [PDF]
ObjectiveThe commingling production of coal-measure gas represents a pivotal approach to enhancing the single-well production of unconventional gas in China.
Dian LI +7 more
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Energy-Efficient Fracturing Based on Stress-Coupled Perforation
, 2023 Hydraulic fracturing is one of the key technologies for reservoir stimulation in low-permeability/unconventional oil and gas fields. In response to the high energy consumption and greenhouse gas emissions caused by extreme flow-limiting perforation in ...
Cheng, Cheng
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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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Research and application on megawatt level intelligent fracturing pump system in coal mine [PDF]
This paper presents the development of a megawatt-scale intelligent fracturing pump system for underground coal mines, designed to address the escalating demands for flow and pressure in large-scale regional fracturing applications, particularly in hard ...
Bo LIU +13 more
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Theoretical and technological system for Highly efficient development of deep coalbed methane in the Eastern edge of Erdos Basin [PDF]
Aiming at the development problems of deep coal reservoirs, such as deep burial, low permeability and complex stress field, this paper clarifies that the resource enrichment conditions, effective fracturing volume, effective horizontal section length ...
Borui XU +12 more
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Production analysis and permeability evolution of fractured horizontal wells of coalbed methane reservoir [PDF]
Massive hydraulic fracturing has changed the status of low-productivity and low development efficiency for coalbed methane (CBM) reservoirs. However, the production dynamics of fractured wells and the permeability evolution mechanisms in CBM reservoirs ...
Jianchun GUO +5 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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Fracturing fracture propagation law of coal seam and its influencing factors in the Shizhuang North Block [PDF]
It is of great significance to reveal the law of fracturing fracture propagation and influencing factors in coalbed methane (CBM) reservoirs for the formulation of fracturing technology and the efficient development of CBM resources.
Li WANG +3 more
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Shiyou jixie, 2015 针对定向井开发油层厚度大的区块时，单层混和水体积压裂纵向动用程度不够，常规分层压裂排量过低的问题，开发了井下丢手式分层体积压裂工艺和配套工具。该工艺通过丢手式钻具组合和专用打捞工具实现各改造段的有效封隔，同时能保护施工段套管，与常规分层压裂相比，排量由2~3 m3/min提高到11 m3/min，具有施工排量大，工具组合简单，施工风险小等优点。在华庆长6油田开展了现场试验，实现了致密厚油层分层多段体积压裂，试验井产量由措施前的日产油1.02 t提高到措施后日产油3.44 t，日增油2.42 t ...
李川 +5 more
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