党文辉,刘天恩,袁光杰,钟守明,李国韬,宋琳,张弘. 呼图壁储气库勺型水平井钻井关键技术[J]. 石油钻采工艺,2021,43(5):593-600. DOI: 10.13639/j.odpt.2021.05.006
引用本文: 党文辉,刘天恩,袁光杰,钟守明,李国韬,宋琳,张弘. 呼图壁储气库勺型水平井钻井关键技术[J]. 石油钻采工艺,2021,43(5):593-600. DOI: 10.13639/j.odpt.2021.05.006
DANG Wenhui, LIU Tian’en, YUAN Guangjie, ZHONG Shouming, LI Guotao, SONG Lin, ZHANG Hong. Key drilling technologies of scoop-shape horizontal well in Hutubi gas storage[J]. Oil Drilling & Production Technology, 2021, 43(5): 593-600. DOI: 10.13639/j.odpt.2021.05.006
Citation: DANG Wenhui, LIU Tian’en, YUAN Guangjie, ZHONG Shouming, LI Guotao, SONG Lin, ZHANG Hong. Key drilling technologies of scoop-shape horizontal well in Hutubi gas storage[J]. Oil Drilling & Production Technology, 2021, 43(5): 593-600. DOI: 10.13639/j.odpt.2021.05.006

呼图壁储气库勺型水平井钻井关键技术

Key drilling technologies of scoop-shape horizontal well in Hutubi gas storage

  • 摘要: 呼图壁储气库受地面条件限制,为有效动用井口下方优质储气层,采用勺型水平井钻井技术,增大水平段长度和储层接触面积,有效提高单井注采能力。勺型水平井由于井眼轨迹及钻具受力复杂,钻井摩阻、扭矩较大,且呼图壁地区反向大尺寸井眼造斜,给水平井井壁稳定性、井眼轨迹控制、降摩减阻及钻井提速等带来了更大的难度。通过井壁稳定性分析,确定最大水平主应力方向为23°,沿最大水平主应力方向钻进井眼最稳定;通过优选钻井液体系、优化通井钻具组合、降摩减阻等措施,确保了反向造斜段套管的安全下入;通过井眼轨迹优化、“一趟钻”PDC钻头及旋转导向技术,实现了四开一趟钻,保证了呼图壁勺型水平井7#的顺利实施,水平段长度较同时期相邻水平井增加了245 m,平均机械钻速提高了9.6%,钻井周期缩短了3.0%。呼图壁储气库勺型水平井的成功实施,为呼图壁储气库高效开发提供强有力的技术保障,也为国内各油气藏型储气库建设提供了借鉴。

     

    Abstract: Hutubi gas storage is limited by the surface conditions, so in order to effectively produce the high-quality gas reservoir below the wellhead, the scoop-shape horizontal well drilling technology is adopted, which can increase horizontal section length and reservoir contact area and improve single well injection and production capacity effectively. Scoop-shape horizontal well is complex in well trajectory and drilling tool stress with greater drilling friction and torque, and reversal large-size hole whipstocking is adopted in Hutubi area, which brings greater challenges to horizon wells from aspects of well stability, well trajectory control, friction and drag reduction and rate of penetration (ROP) improvement. It is determined by the well stability analysis that the maximum horizontal principal stress is in the direction of 23° and the drilling along the maximum horizontal principal stress is the most stable. The safe running of the casing in the reversal whipstocking section is ensured by selecting drilling fluid system, optimizing drifting bottom hole assembly (BHA) and reducing friction and drag. The fourth spud in one trip is realized by means of well trajectory optimization, “one-tip” PDC bit and rotatory steering technology, which ensures the smooth drilling of scoop-shape horizontal well 7# in Hutubi. Compared with its contemporaneous neighboring horizontal well, its horizontal section is 245 m longer, its average ROP is 9.6% higher and its drilling cycler is 3.0% shorter. The successful implementation of scoop-shape horizontal well in Hutubi gas storage provides a powerful technological guarantee for the efficient development of Hutubi gas storage and a reference for the construction of gas storages rebuilt from oil and gas reservoirs in China.

     

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