Results 21 to 30 of about 567 (152)
Shiyou jixie, 2015 针对川西油田水平井机械钻速低、起下钻频繁和钻井周期长的问题，在底部钻具组合力学分析的基础上，对水平段稳斜钻具组合进行优选，并提出了以水平段轨迹控制技术、井眼清洁控制技术、PDC钻头优选技术、润滑防塌钻井液技术和无线随钻测量技术为核心的川西中浅层气藏千米水平段一趟钻关键技术。应用一趟钻关键技术在川西地区完成了多口井的施工，与2011年完钻同类型水平井相比，钻井技术指标大幅提升，沙溪庙组水平井在水平段长增加434 m的情况下，钻井周期缩短13.71%，机械钻速提高37.99%；蓬莱镇组水平井钻井周期缩短38.
崔杰, 纪友亮
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Sedimentary patterns and exploitation practices of tight-sand gas reservoirs in coal measure strata: A case study of the 3rd submember of the second member of the Permian Shanxi Formation in the Daning-Jixian block [PDF]
BackgroundThe third submember of the second member of the Permian Shanxi Formation (also referred to as the Shan 23 submember) in the Daning-Jixian block along the eastern margin of the Ordos Basin is identified as a primary target layer for tight-sand ...
Feng WANG +9 more
core +1 more source
Shiyou jixie, 2015 致密油开发目前多采用工厂化长位移水平井的方式，水平井段的长度直接影响到致密油藏开发的效率。分析了制约致密油水平井水平段延伸长度的主要因素，采用实测数据反演摩阻系数法预测井口载荷以及考虑接头环空压耗的计算模型，指出额定泵压是水平段延伸长度的主要限制因素，较为准确地预测了致密油长位移水平井水平段安全延伸长度。在额定泵压30 MPa，排量14 L/s，完井井眼尺寸φ152.4 mm的情况下，新疆昌吉致密油水平井的最大安全延伸长度为3 000 m。
刘洋 +5 more
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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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Progress and trend of key technologies of CBM development and utilization in China coal mine areas [PDF]
, 2022 The key to coordinated development of coal mine methane and coal is to coordinate the spatio-temporal relationship between coal mining and coal mine methane development.
Haitao SUN +3 more
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Shiyou jixie, 2014 热采水平井蒸汽吞吐时水平段吸汽不均衡，造成水平段动用不均。鉴于此，对热采水平井改善吸汽剖面技术进行研究。首先，建立油藏井筒流动耦合模型及储层热流变形三场耦合模型，定量分析了油层物性参数、非均质性及注汽口位置对吸汽剖面的影响。然后，根据上述分析结果，设计了均衡注汽完井工艺管柱。该管柱可实现注采一体化及均匀注汽以及长水平段、非均质储层的均匀注采。现场应用结果表明，热采水平井改善吸汽剖面技术可以改善热采水平井长水平段的吸汽剖面，实现均衡注汽，提高水平井的动用程度。
岳慧 +4 more
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Practice and understanding of deep coalbed methane massive hydraulic fracturing in Shenfu Block, Ordos Basin [PDF]
The proven geological reserves of the Shenfu deep coalbed methane (CBM) field on the eastern margin of the Ordos Basin exceed 100 billion cubic meters.
Fan YANG +6 more
core +1 more source
Shiyou jixie, 2014 针对日光油田Cardium组致密油开发需要大量高效低成本的水平井钻井和多段压裂等特点，研究并应用了致密油大位移水平井钻井技术。考虑大位移水平井复合钻井的特殊要求，建立了三段组合圆弧井眼轨道模型，深入研究了井身结构、油基钻井液、钻头优化和钻具组合等关键技术。对3口先导试验大位移水平井丛式井组和3口相邻水平井丛式井组的经济效益进行了评价，评价结果表明，其平均每米水平段长度的钻完井费用比相邻丛式井组节约22%、钻井周期比相邻丛式井组减少42%，其初始平均日产量和6个月总产量分别是相邻丛式井组的1.6倍和1 ...
谈 +4 more
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Production capacity prediction of U-shaped horizontal wells for in-situ pyrolysis of tar-rich coal: Experimental and numerical simulation study [PDF]
Under the goal of “dual carbon”, “taking hydrogen and retaining carbon” has become an inevitable choice for the clean utilization of coal, and underground coal pyrolysis provides a new idea for increasing domestic tar and gas production.
Bo REN +10 more
core +1 more source
Shiyou jixie, 2014 砂砾岩油藏为典型的低孔特低渗透储层，采用直斜井压裂方式开采，油井产能低，储量动用低，常规技术开发效益不佳，为了提高单井产能而选用长水平段分段压裂的开发方式。介绍了胜利油田首口砂砾岩非常规长水平段水平井盐227-1HF井的地质、工程概况，探讨了钻井技术难点，给出了可行的钻井技术措施，包括钻具组合优选、井眼轨迹控制、钻头优选、钻井液技术优化以及水平段测量技术优选。为了提高水平段的钻井速度而采用欠平衡泡沫钻井液钻井，水平段平均机械钻速达到6.21 m/h，是邻井的3～4倍，压裂投产后单井日产油12 t ...
吴明波, 曹向峰
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