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Field test of radial jet drilling technology in a surface formation
Journal of Petroleum Science and Engineering ( IF 5.168 ) Pub Date : 2022-08-01 , DOI: 10.1016/j.petrol.2022.110928
Jingbin Li , Zhe Huang , Gensheng Li , Zhongwei Huang , Jiacheng Dai , Kang Cheng

The radial jet drilling (RJD) technology is an efficient formation stimulation and injection technology that drills multiple laterals perpendicular to the central well. Extensive research has been on jet rock breaking, lateral extension, productivity prediction, and technological processes. However, little public literature illustrates the overall drilling performance of the RJD systems. Herein, a field test is conducted in the surface sandstone formation. Eight laterals are successfully drilled using the self-rotating multi-orifices nozzle with a 35–40 MPa (5.08–5.80 ksi) jet pressure. The cumulative length of the eight laterals is 21.1 m (69.2 ft), with the longest one being 5.7 m (18.7 ft). The lateral diameter is 50 mm (1.97 in), drilled at the fastest drilling rate of 3.6 m/h (11.8 ft/h). The auxiliary traction device can provide extra feed-in force to the high-pressure hose. The lateral trajectories are measured with their accuracy confirmed by the coring well. During the field test, a lateral trajectory up-warping problem is found, of which the possible causes and the suggestions are provided. According to the internal shape of the lateral obtained by endoscopic imaging, the lateral section exhibits a ring structure, indicating the high rock breaking efficiency of the self-rotating multi-orifices nozzle. The formation anisotropy and natural fracture have little influence on the lateral trajectory but affect the lateral section shape. The research results prove the reliability of the RJD system developed and can contribute to future development and application of RJD technology.



中文翻译:

径向喷射钻井技术在地层中的现场试验

径向喷射钻井(RJD)技术是一种高效的地层增产和注入技术,可垂直于中心井钻出多个支管。在喷射破岩、横向延伸、生产力预测和技术过程方面进行了广泛的研究。然而,很少有公开文献说明 RJD 系统的整体钻井性能。在此,在地表砂岩地层中进行了现场测试。使用具有 35–40 MPa (5.08–5.80 ksi) 射流压力的自旋转多孔喷嘴成功钻探了 8 个支管。8 个支管的总长度为 21.1 m(69.2 ft),最长的一个为 5.7 m(18.7 ft)。横向直径为 50 mm (1.97 in),以 3.6 m/h (11.8 ft/h) 的最快钻孔速度钻孔。辅助牵引装置可为高压软管提供额外的进给力。横向轨迹的测量精度由取心井确认。在现场试验中,发现了横向轨迹上翘问题,并给出了可能的原因和建议。根据内镜成像得到的支管内部形状,支管呈环状结构,说明自旋转多孔喷管破岩效率高。地层各向异性和天然裂缝对横向轨迹影响不大,但影响横向剖面形状。研究结果证明了所开发的RJD系统的可靠性,可以为RJD技术的未来发展和应用做出贡献。横向轨迹的测量精度由取心井确认。在现场试验中,发现了横向轨迹上翘问题,并给出了可能的原因和建议。根据内镜成像得到的支管内部形状,支管呈环状结构,说明自旋转多孔喷管破岩效率高。地层各向异性和天然裂缝对横向轨迹影响不大,但影响横向剖面形状。研究结果证明了所开发的RJD系统的可靠性,可以为RJD技术的未来发展和应用做出贡献。横向轨迹的测量精度由取心井确认。在现场试验中,发现了横向轨迹上翘问题,并给出了可能的原因和建议。根据内镜成像得到的支管内部形状,支管呈环状结构,说明自旋转多孔喷管破岩效率高。地层各向异性和天然裂缝对横向轨迹影响不大,但影响横向剖面形状。研究结果证明了所开发的RJD系统的可靠性,可以为RJD技术的未来发展和应用做出贡献。并给出了可能的原因和建议。根据内镜成像得到的支管内部形状,支管呈环状结构,说明自旋转多孔喷管破岩效率高。地层各向异性和天然裂缝对横向轨迹影响不大,但影响横向剖面形状。研究结果证明了所开发的RJD系统的可靠性,可以为RJD技术的未来发展和应用做出贡献。并给出了可能的原因和建议。根据内镜成像得到的支管内部形状,支管呈环状结构,说明自旋转多孔喷管破岩效率高。地层各向异性和天然裂缝对横向轨迹影响不大,但影响横向剖面形状。研究结果证明了所开发的RJD系统的可靠性,可以为RJD技术的未来发展和应用做出贡献。地层各向异性和天然裂缝对横向轨迹影响不大,但影响横向剖面形状。研究结果证明了所开发的RJD系统的可靠性,可以为RJD技术的未来发展和应用做出贡献。地层各向异性和天然裂缝对横向轨迹影响不大,但影响横向剖面形状。研究结果证明了所开发的RJD系统的可靠性,可以为RJD技术的未来发展和应用做出贡献。

更新日期:2022-08-01
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