Results 31 to 40 of about 567 (152)
Shiyou jixie, 2014 近年来水平井应用规模迅速扩大，但由于其井身结构的特殊性，地层出砂问题比直井更加突出，水平井冲砂洗井效果将直接影响其产能和开采成本。阐述了水平井冲砂洗井过程中水平井段、斜井段和直井段的岩屑运移机理，介绍了现阶段应用和发展的冲砂洗井技术（常规密封连续冲砂技术、连续管清砂技术、真空清砂技术和泡沫流体冲砂技术）的原理及特点。在此基础上，论述了目前国内外水平井冲砂洗井使用的主要工具（普通油管旋流连续冲砂工具、连续管旋转射流冲砂工具及同心连续管真空清砂工具）的结构及工作原理 ...
张好林 +3 more
doaj
China’s CBM exploration and production and associated technological advancements: A review and reflections [PDF]
Objective and Methods Based on extensive scientific and technical literature and technical data on coalbed methane (CBM) exploration and production projects, this study conducted a comparative analysis of the development process and latest advances in ...
Jianping YE
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Shiyou jixie, 2012 为满足海上油田水平井及大斜度定向井防砂完井需求，研制了水平井防砂完井物模试验装置。该装置是根据海上油田的钻完井井筒尺寸、射孔方式以及主要完井类型等进行设计的，主要由模拟井筒、加砂混砂、泵注、沉砂过滤、数据及视频采集分析、远程控制及升降支架辅助等系统组成，可针对海上不同的油藏类型和特点，优选出水平井（定向井）防砂完井方式。采用该试验装置开展了水平井砾石充填过程中排量、砂比、携砂能力和漏失量等参数优化的试验研究。试验结果表明，该装置可以提高海上水平井防砂完井成功率，延长防砂完井有效期 ...
高斌 +5 more
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Fluid–solid coupling productivity analysis of multi-stage fractured horizontal wells in shale reservoirs [PDF]
Starting from the micro/macro dynamics of seepage behavior, stress-sensitive experiments are conducted to investigate the fluid–solid coupling and fluid flow law in shale gas reservoirs.
Ming YUE +3 more
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Shiyou jixie, 2014 针对吉林油田大安北致密油水平井采用裸眼滑套可开关封隔器多段分压工艺开采，对压后段间矛盾突出，呈现产量低、含水高的情况进行了出水治理技术研究。采用普通油管或连续管带动开关工具，可以将任意层的滑套打开或关闭进行逐层试采，也可以将高含水层段关闭，达到堵水消除段间干扰目的。2口井的现场施工结果表明，施工成功率100%，有效率100%，其中施工后的红平X1井由原来平均日产油0.5 m3增至5.0 m3，红平X2井由原来平均日产油1.8 m3增至8.5 m3。研究结果可为该类水平井的出水治理提供参考。
林其勇, 谢敏
doaj
CFD simulation on in-situ ignition of UCG in deep coal seam [PDF]
Underground coal gasification (UCG) as an alternative coal mining technology is attracting much attention. However, due to the high experimental cost of UCG, the evolution mechanism of coal seam should be deeply explored prior to the implement of ...
Can FANG +10 more
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Shiyou jixie, 2015 针对国内传统开关阀不适用于水平井控水稳油的分层开采，设计了水平井压差平衡式开关阀。水平井压差平衡式开关阀在设计上充分考虑了高压密封性、防震抗冲击性及防砂堵技术性能。尤其是采用了独特的自适应动态压力平衡系统及电子开关体精密检测限位等高新技术设计，确保了仪器井下工作的长期稳定性和可靠性。现场试验结果表明，该开关阀克服了现有的开关阀在调整开关时泵车压力精度不易控制，多级使用时造成开关误动作的不足，提高了水平井找水的效率和准确性。
陈江烨, 王一良, 侯庆春
doaj
Microgravity Monitoring Technology for Deep Gas-Reservoir Development based on Dixi 121 Wellblock in Xinjiang Oilfield [PDF]
The difference in natural-gas enrichment significantly affects the underground medium density and thus the surface gravity. Microgravity monitoring technology monitors the morphological changes of a gas-reservoir development zone by measuring the surface
Changrui ZHANG +10 more
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Shiyou jixie, 2015 大牛地气田部分水平井存在井底出砂现象限制了气井产能，采用常规冲砂工艺时井筒内流体易漏失到地层，造成地层伤害，为此开展了速度管泡沫冲砂工艺技术研究。综合考虑压力、温度、黏度和流体密度的影响，由力平衡原理建立了水平井泡沫临界携砂流速计算模型，经计算得知水平段临界携砂流速是垂直段1.5倍，倾斜段介于两者之间。基于气井泡沫携砂模型，以鄂尔多斯盆地伊陕斜坡东北部的1口水平井DPS-9井为施工试验井，设计了该井施工参数，即井口回压在5.0 MPa内，泡沫液与氮气注入比不超过3∶1，冲砂管柱外径优选为38.1 mm ...
doaj
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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