Results 21 to 30 of about 5,722 (144)
The application of sedimentary microfacies on the fracability of tight sandstone reservoir in Chang 7 member of Longdong area in the Ordos Basin [PDF]
Objective Sedimentary differences are the key factor in controlling reservoir heterogeneity. Analyzing reservoir heterogeneity through sedimentary microfacies is crucial for oil and gas field development and sweet spot prediction, and it also informs ...
CHEN Shuai +5 more
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Shiyou jixie, 2014 非常规油气藏开采难度大，开发成本高，原有的水平井管内分段压裂技术存在分段级数少、压裂规模小等问题，无法满足非常规油气资源高效开发的要求。为此，分析了水平井泵送桥塞、固井投球滑套、连续管拖动封隔器等多级分段压裂新技术，其中，泵送桥塞射孔多级分段压裂技术分段级数不受限制，适合大排量、大液量压裂要求，是页岩油气开发的利器。固井投球滑套分段压裂技术滑套可重复开启，能满足选择性生产、堵水及重复性压裂的需求。各种水平井管内多级分段压裂新技术的成功应用，为非常规油气藏开发提供了强有力的技术支持。
伊西锋
doaj
Influence of fracturing reconstruction of coalbed methane wells on gas production and development suggestions in Guizhou Province: taking Panguan syncline as an example [PDF]
In Guizhou Province, there are many coal-bearing structural units, many layers of coal, thin thickness, and most of them are low permeability reservoirs, so it is advisable to adopt the process of “staged fracturing and combined layer drainage and ...
Haiyang HU +6 more
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Shiyou jixie, 2012 针对海上压裂测试作业高风险、高成本的特点，在现有技术的基础上，对射孔压裂测试一体化工艺进一步优化研究，对井下工具进行优化配置，并进行了详细的风险分析，提出了相应的应对措施，最终设计了射孔压裂测试一体化施工管柱。在海上某井采用一体化管柱进行压裂施工，压裂后自喷返排，求得天然气产量为9.6万m3/d；在另一口井的施工作业中也收到了较好的应用效果，从压裂前的无产能到压裂后气产量2.9万m3/d。应用射孔压裂测试一体化技术可以进行压裂前、后测试效果的对比，减轻对地层的污染，为测试地质资料的评价提供保证 ...
郭士生 +5 more
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Gaoya dianqi, 2023 文中介绍了一起某核电厂发电机断路器液压操作机构因缸体裂纹导致内漏合闸无法保压的故障，为分析缸体裂纹导致内漏的根本原因及制定纠正措施，通过对缸体裂纹从缸体应力、液压缸体金属学分析、液压油3个方面采用缸体有限元模型分析、金相分析、硬度检测和粗糙度检测、力学性能检测等方法进行分析，确认根本原因为表面处理不当导致产生了应力腐蚀裂纹。提出了改进缸体表面工艺处理和通过改造增加预警即监视液压操作机构油泵打压次数措施。实施改进和措施后未再发生液压操作机构缸体裂纹故障。
刘鹏, 赵波
doaj
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
core +1 more source
Shiyou jixie, 2015 为了解决苏里格地区油井压裂后续改造中存在的一些问题，引进了连续管无限级滑套分段压裂技术。该技术通过无限级滑套和套管一起固井，然后下入连续管井下工具组合逐个打开无限级滑套进行压裂。该技术在苏里格区块进行了一口井10层的加砂压裂，该井作业时间约15 h，有8个滑套都顺利打开，当超压滑套不能打开时，及时进行了喷砂射孔，顺利完成了10层的主压裂，压裂过程中封隔器均坐封稳定可靠，解封顺利，出现砂堵不能解封时，第一时间建立起正循环解除了砂堵 ...
李梅 +5 more
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Physical simulation study on the transport of biomimetics dandelion proppant in similar coalbed methane fracture network [PDF]
Accelerating the exploration and development of deep coalbed methane resources is a key direction for developing coalbed methane. However, with large-scale volume fracturing in deep coalbed methane development, the complexity of the fractures formed by ...
Jun LI, Nianyin LI, Pingli LIU
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Shiyou jixie, 2014 考虑多裂缝煤岩储层裂缝发育特性，基于简化的NS方程和连续性方程建立了水力压裂裂缝尖端动态扩展模型。采用坐标变换的方法简化缝内流体连续性方程，计算得到多裂缝煤岩储层任意时刻压裂液的滤失速度。应用3D－CBMulti－Fracture软件，对山西某区块WS-10煤层气井水力压裂主裂缝及次生裂缝动态扩展过程进行研究。研究结果表明，当携砂液注入次生裂缝时间超过5 min后，压裂液滤失速度出现波动，随着裂缝尖端砂堵区渗透率增大，压裂液滤失系数增大；当次生裂缝砂堵区渗透率较小时，裂缝尖端变得短而粗 ...
杨尚谕 +3 more
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Stress transfer mechanism and engineering practice of hydraulic fracturing roof cutting in roadway [PDF]
Aiming at the problem that the hard roof in the goaf is difficult to collapse, which causes severe mine pressure in the roadway, the transport roadway in the eighth mining area of Jingfang Coal Mine is taken as the engineering background, through ...
Fantai MA +5 more
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