Results 21 to 30 of about 3,342 (167)
Shiyou jixie, 2012 水平井分段压裂技术是水平井增产改造的重要技术。该技术可在第1层压裂结束后，投球加压，使滑套下移，将下面一层关闭，露出第2层喷砂循环孔，开始第2层压裂，实现不动管柱多层压裂。在介绍水平井分段压裂技术关键工具结构及性能的基础上，以水平5-1井为例，对该技术的应用情况进行了介绍。应用结果表明，封隔器分段压裂技术分段准确、施工方便，对开发低渗透油藏具有良好效果。建议进一步开展压裂工具的优化设计和不动管柱封隔器分段压裂技术研究。
孙骞 +4 more
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Petroleum Exploration and Development, 2011 Taking the Kenjiyak Oilfield in Kazakhstan as an example, the fracture characteristics and genetic mechanism of carbonate reservoirs with overpressure were discussed.
Dezhi Bian +4 more
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Research progress and breakthrough directions of the key technical fields for large scale and efficient exploration and development of coalbed methane in Xinjiang [PDF]
The Xinjiang Uygur Autonomous Region has presented the expected resource conditions and work foundations for a large-scale coalbed methane (CBM) exploration and development, which shows that its CBM resources below the depth of 2000 m are 7.5 trillion m3,
Bo WEI +12 more
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Shiyou jixie, 2012 针对水平井分段有效压裂难题，研发了水力分段射孔压裂配套工具。该工具主要由万向接头、偏心定位器、喷射器、单流阀等组成。应用水力分段射孔压裂工艺对吴平1井、吴平6井等6口井进行了作业。应用结果表明，美国喷嘴抗磨性能优于硬质合金喷嘴，压裂阶段排量保持在1.8 m3/min左右时，分阶段加大砂质量浓度对喷嘴损伤影响不大，目前喷射器设计壁厚28 mm，安全系数较高，可以满足喷射压裂3段的安全需要。
丁青山 +4 more
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Typical characteristics of deep coal seams with high outburst risk, outburst inducing mechanism and prevention measures [PDF]
Coal mining in China has gradually entered deep levels. With the continuous increase in mining depth, the outburst risk of coal seam has significantly increased, with both the frequency and intensity of outbursts rising noticeably, posing huge challenges
Baiquan LIN, Tong LIU, Wei YANG
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Shiyou jixie, 2014 针对目前国内外超低渗透油藏水平井压裂改造工艺复杂、工具应用效率低和可靠性差的现状，设计了不动管柱多级水力喷砂分段压裂工具，研发了投球式滑套喷射器与封隔器，将多套喷射器串接，施工时通过投球的方式逐级打开各级喷射器和封隔器，实现射孔及压裂。该工艺管柱具有井下工具少、不泄压投球等特点，能够不动管柱一次性完成水平井3层段分段压裂。现场试验结果表明，该工艺管柱性能可靠，提高了分段压裂改造成功率和施工效率，是一种先进、安全、可靠、高效的水平井分段改造工艺技术 ...
殷桂琴 +5 more
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Evolution of broken pressure and fracture morphology in indirect fracturing for broken-soft coal [PDF]
Indirect fracturing using a horizontal well in roof is a promising technology for methane exploitation in broken soft and low-permeability coal seams. Stratum-penetration fracturing and a complex fracture network with good conductivity are two keys for ...
Dijie ZHU +5 more
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Shiyou jixie, 2014 多级滑套分段压裂工艺技术和泵送桥塞分段压裂工艺技术各自都存在应用局限，国外开发的一球多簇分段压裂滑套工艺技术能弥补现有技术的不足。简要介绍了一球多簇分段压裂工具技术的发展状况、工艺技术原理、工具功能结构，并对该工具设计及应用中的关键参数进行了设计计算。一球多簇分段压裂滑套工具能够通过投放1球实现多点压裂，形成足够多的裂缝连通储藏，从而提高油气采收率。簇式滑套是实现投放1枚憋压球开启多簇滑套的关键工具，而其独特结构的球座是实现该功能的关键部件。该工艺技术为非常规油气的高效开采提供了新的方法。
戴文潮 +4 more
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Key problems in in-situ pyrolysis of tar-rich coal drilling for extraction of coal-based oil and gas resources [PDF]
, 2023 Tar-rich coal is a special coal resource with the property of oil and gas resources. Developing the oil and gas resources contained in the tar-rich coal is of great significance for ensuring energy security and realizing the goal of "dual carbon".
Dan HE +6 more
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Shiyou jixie, 2012 国外用于页岩气的水平井水力多段压裂技术比较成熟，采用其多段压裂工具勘探开发成本相对较高，而我国至今还没有形成成熟技术。简要介绍了国外具有代表性的威德福、哈利伯顿和贝克休斯公司用于页岩气井裸眼多级分段压裂相关工具及案例，并针对我国油气田的现状，设计了1趟管柱多级分段压裂系统方案。该方案采用自膨胀式封隔器+投球滑套的方式，管柱选用Φ114.3 mm套管，此种完井方式相对于套管固井后再分段压裂的方式可大幅节约成本。试验结果表明，采用自膨胀封隔器完全可以满足国内页岩气开发的需求 ...
曲丛锋 +4 more
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