臧艳彬. 川东南地区深层页岩气钻井关键技术[J]. 石油钻探技术, 2018, 46(3): 7-12. DOI: 10.11911/syztjs.2018073
引用本文: 臧艳彬. 川东南地区深层页岩气钻井关键技术[J]. 石油钻探技术, 2018, 46(3): 7-12. DOI: 10.11911/syztjs.2018073
ZANG Yanbin. Key Drilling Technology for Deep Shale Gas Reservoirs in the Southeastern Sichuan Region[J]. Petroleum Drilling Techniques, 2018, 46(3): 7-12. DOI: 10.11911/syztjs.2018073
Citation: ZANG Yanbin. Key Drilling Technology for Deep Shale Gas Reservoirs in the Southeastern Sichuan Region[J]. Petroleum Drilling Techniques, 2018, 46(3): 7-12. DOI: 10.11911/syztjs.2018073

川东南地区深层页岩气钻井关键技术

Key Drilling Technology for Deep Shale Gas Reservoirs in the Southeastern Sichuan Region

  • 摘要: 针对川东南地区页岩气储层埋藏深、岩石强度高、地质构造复杂及机械钻速低、钻井周期长的问题,通过对比分析国内外深层页岩气钻井技术,总结了川东南地区深层页岩气钻井面临的主要技术难点,结合中浅层页岩气钻井技术研究成果与应用情况,从井身结构优化、钻井提速技术、井眼轨迹控制、高密度油基钻井液和深层页岩气固井技术等方面入手,研究形成了适合于川东南深层页岩气的钻井关键技术,并在涪陵地区平桥和江东区块及丁山、威荣、永川等地区的深层页岩气井中进行了应用,取得了显著效果。其中,与应用钻井关键技术前相比,焦页74-2HF井的机械钻速提高了73.48%,钻井周期缩短了42.89%;焦页187-2HF井的机械钻速提高了37.26%,钻井周期缩短了25.79%。研究认为,川东南地区深层页岩气钻井关键技术,对该地区深层页岩气钻井技术方案设计和钻井提速提效具有较强的借鉴和指导作用。

     

    Abstract: Due to deep burial depth,high rock strength and complex geological structures of shale reservoirs in Southeastern Sichuan,shale gas drilling in this region has encountered the challenges of low rate of penetration and long drilling period.Through a comparative analysis of deep shale gas drilling technologies in China and abroad,and by reviewing a summary of the main technical challenges faced by deep shale gas drilling in Southeastern Sichuan,we determined the key technologies to drill in deep shale gas formations in the Southeastern Sichuan Region.Factors included casing program optimization,rapid drilling,wellbore trajectory control,high-density oil-based drilling fluids,and deep shale gas cementing optimization,while considering research results and applications of middle-shallow shale gas drilling technologies.These technologies have been used in deep shale gas wells in blocks like Pingqiao,Jiangdong of Fuling Area and area like Dingshan,Weirong,Yangchuan,and achieved significant positive results.Among them,the rate of penetration of Well JY74-2HF was increased by 73.48%,and the drilling cycle was shortened by 42.89%; the rate of penetration of Well JY187-2HF was increased by 37.26%,and the drilling cycle was shortened by 25.79%.The research results are significant in that they can provide reference points and excellent guidance for and drilling plan design,rapid drilling and efficiency enhancements of deep shale gas wells in China.

     

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