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地热井花岗岩地层钻进提速技术研究与应用进展北大核心CSCD 总被引:1,自引:0,他引:1
地热资源是一种非碳基清洁能源,开发地热资源可为实现碳中和提供有力支撑。随着地热资源勘查开发进度的不断加快,花岗岩地层的钻遇率不断提高。花岗岩地层岩石硬度高、可钻性差,钻进难度大,开展花岗岩地层钻进提速技术及应用研究对促进地热资源开发利用有重要意义。本文系统梳理了国内外花岗岩地层钻进提速技术,分别介绍了螺杆马达、涡轮钻具、蓄能式提速工具、液动冲击器、气动潜孔锤等井下提速工具的特点和研究进展,结合钻探工程应用实践对每种提速钻进工具的应用情况进行了分析,针对不同工程地质特点总结提出了提速技术优选建议。对于常规地热井或温度小于150℃的花岗岩地层,宜采用螺杆马达配合牙轮钻头复合钻进技术;对于不含水或出水量较小的花岗岩地层,宜采用气动潜孔锤钻进提速技术;对于温度高于150℃或硬度高、研磨性强的花岗岩地层,采用涡轮钻具复合钻进技术提速效果更为明显。 相似文献
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射流式液动锤回转冲击孕镶金刚石钻头钻进的实践与分析 总被引:2,自引:0,他引:2
金刚石本身力学性质、金刚石钻头结构特点及射流式液动锤冲击力特点决定了射流式液动锤带金刚石钻头进行冲击回转钻进是可行的。经射流式液动锤在科学钻探主孔先导孔中的应用实践,证明了由于液动锤冲击动载作用钻头底唇面与岩面微量问隙有规律地变化,改善钻头金刚石颗粒受力状况、碎岩状态,提高钻头金刚石颗粒切入深度,改善胎体磨损状况、钻头冷却,成倍地提高了榴辉岩、片麻岩等坚硬地层中钻进回次进尺、机械钻速及钻头平均寿命。 相似文献
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油气勘探钻井用液动射流式冲击器的研究与应用 总被引:20,自引:0,他引:20
冲击回转钻进技术是当前解决硬岩进难题最有效的方法之一,将液动冲击回转钻进技术成功地推广应用于油气田勘探钻井中,预期可使硬岩平均钻进效率提高30%-50%,成本下降15%-20%。笔者就液动射流式冲击器应用于石油钻井的可行性和意义进行了较详细的分析论证,对所设计的石油钻井用液动射流式冲击器的结构和工作原理进行了说明,最后总结了生产性试验中存在的问题,提出了进一步改进的方案。 相似文献
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由长春地质学院和无锡钻探工具厂共同研制成功的SC—150型射流式液动冲击器,于1991年5月上旬在长春市通过部级鉴定。液动射流式冲击器是用射流元件控制冲击器的一种新型钻具。它以钻进冲洗液作工作介质,经过一个双稳射流元件,使钻具的活塞冲锤产生冲击,传至岩芯管和钻头,使钻具的纯回转钻进变为冲击回转钻进。该钻具的特点是:钻进效率高,比普通回转钻进小时效率提高210%,回次进尺和合班进尺分别提 相似文献
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小秦岭地区是我国主要的矿产资源地,属于严重的破、碎、硬、漏等复杂地层,特别是岩石结构致密、颗粒细、研磨性较弱的坚硬地层,采用传统回转钻进工艺时,钻头经常出现"打滑"现象,从而导致钻头寿命低、钻探效率低、事故率高、钻探成本高等问题。针对这些问题并结合生产,本文选择了3处典型复杂地层进行了液动潜孔锤+绳索取心"二合一"和传统金刚石绳索取心钻探试验。试验结果表明:与传统金刚石绳索取心钻进工艺相比,液动锤平均回次进尺可提高44%,机械钻速提高21.34%~30.3%,平均综合钻探成本降低了21%~28%,其中钻头费用可降低66.5%。同时,由于碎岩方式的改变,液动潜孔锤钻探具有钻孔防斜效果好、事故率低、钻头使用寿命长等特点。 相似文献
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为了提高内蒙古意1井3000 m以深下部井段机械钻速,采用了射流冲击器旋冲钻井提速技术。根据地层岩性特点,通过冲击器台架性能测试,优选出了冲击器的冲击功及冲击频率,确定了旋冲钻井参数。射流冲击器配合牙轮钻头应用井段为3675~3817 m,通过合理确定水力参数及冲击器的性能参数,取得了预期的提速效果,达到了提速增效的目的。冲击器纯钻共计185 h,总进尺142 m,采用旋冲钻井技术,在相同地层及钻头条件下,旋冲钻井2趟钻进进尺较以前转盘钻进4趟钻进进尺多10 m,提高机械钻速达42%,为白音查干区块钻井提供了一项新的技术手段。 相似文献
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射流元件损坏机理试验研究及分析 总被引:13,自引:0,他引:13
液动射流式冲击器在高压釜内进行模拟试验时发现其工作性能良好,展现了其良好的应用前景。而在石油钻井、大陆科学深钻等深孔钻进中应用液动射流式冲击器发现,射流元件寿命较低。故有必要对其破坏机理进行研究。在实验中采用对比的方法,发现在大泵量情况下射流元件工作室内出现水射流反射及脉冲现象。射流元件破坏主要由脉冲AWJ切割所造成。液动射流式冲击器用于深孔钻进时射流元件有必要对元件尺寸进行改进。 相似文献
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Gilles Serge Odin 《Comptes Rendus Geoscience》2002,334(6):409-414
Lithostratigraphy, physicochemical stratigraphy, biostratigraphy, and geochronology of the 77–70 Ma old series bracketing the Campanian–Maastrichtian boundary have been investigated by 70 experts. For the first time, direct relationships between macro- and microfossils have been established, as well as direct and indirect relationships between chemo-physical and biostratigraphical tools. A combination of criteria for selecting the boundary level, duration estimates, uncertainties on durations and on the location of biohorizons have been considered; new chronostratigraphic units are proposed. The geological site at Tercis is accepted by the Commission on Stratigraphy as the international reference for the stratigraphy of the studied interval. To cite this article: G.S. Odin, C. R. Geoscience 334 (2002) 409–414. 相似文献
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正1 Introduction Geological studies established on several sections in Lanping-Simao basin have shown that the salt-bearing strata of Mengyejing formation(Yunlong Fm.in Lanping basin)are constituted by an alternation of salt layers and interbedded facies.The latter consists mainly of mudstones,and mudstone-rich conglomerate.The mineralogy and geochemistry of salt-bearing beds and 相似文献
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正On 22nd April 2014,with the approach of the 45th World Earth Day,China’s Ministry of Land and resources issued the status of China’s mineral resources in 2013.The first task of the prospecting breakthrough strategy action implemented in the last five years has been completed,and China’s security capacity for mineral resources has been significantly improved.In the 相似文献
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正There are more than 700 salt lakes with area of more than 1km2 on the Qinghai-Tibet Plateau of China.In recent years,an oilfield brine was also found in the Nanyishan Section of Qaidam Basin in the Qinghai-Tibet 相似文献
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正1 Introduction Physical and numerical models are constructed to investigate the evolution and mechanism of salt migration driven by tectonic processes.In recent years,we have designed and ran series of models to simulate salt 相似文献
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YUAN Qin LI Jianguo QIN Zhanjie WEI Haicheng SHENG Shurong SHAN Fashou 《《地质学报》英文版》2014,88(Z1):276-276
正The study of Cretaceous-Palaeogene salt-bearing strata of the Khorat Basin Laos and the Lanping-Simao Basin in Yunnan,China has an great significance not only in explaining the basin evolution and the genesis of potash 相似文献
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正Potash is one of the long-term scare deposits in China,and potash prospecting has long been listed as a key brainstorm project for our nation and geological prospecting units.There have been considerable studies in search for potash deposits in the Kuqa depression of the Tarim basin(Jackson et al.,1991;Gemmer et al.,2004;Vendeville,2005;Vendeville and Jackson,1992a,1992b), 相似文献
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正1 Introduction Qaidam Basin in Qinghai,including 43 salt lakes with multiple dominant mineral such as potassium,magnesium,lithium etc.,is the most intensive distribution of Saline 相似文献