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简述了河北省迁安市红山铁矿详查矿区地层坚硬、破碎等复杂特点和地层的岩性情况,总结了该矿区破碎复杂地层绳索取心钻探施工技术经验,着重从钻孔结构、钻具及钻进参数选择和冲洗液选取与配制方面分析了破碎漏失、坍塌掉块及坚硬＂打滑＂地层的处理方法,阐述了保证复杂地层岩心采取率和预防钻孔倾斜的技术措施。通过护壁堵漏、改进冲洗液的配比、调整钻头的胎体硬度,改善了复杂地层的钻进环境,提高了钻探生产效率。 相似文献
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本文介绍了南黄海大陆架科学钻探工程CSDP-02井施工概况以及采用的关键技术.主要有:海域岩心钻探钻井施工平台的建设;超前卡簧座加拦簧技术;高密实度砂层钻头内径镶合金保径技术;底喷式钻头技术;三层管钻具和MBM盐水泥浆技术.通过对以上难点的解决,取得了很多重要成果.钻井井深2843.18m(钻台至海底33.30m),实际进尺2809.88m,并完成了测录井等重要工作.为地质钻探在海洋钻探方面迈出重大一步. 相似文献
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Chevron‐folded Ordovician‐Silurian turbidite sequences in the northern Tabberabbera Zone, Lachlan Orogen are cut by steeply, northeast‐ and southwest‐dipping fault zones with black slate (?Warbisco Shale) incorporating tectonic mélange (broken formation) in the hangingwalls. The black slate zones appear laterally discontinuous, have 50–150 m outcrop widths, and are spaced at ∼2–4 km (Rose River section). Dominated by attenuated, homoclinally dipping bedding, local disruption in these zones is shown by block‐in‐matrix tectonic mélange (broken formation). The mélange fabric has anastomosing, stylolitic cleavages typical of pressure solution. Marked flattening and attenuation of sedimentary layering is accompanied by up to 180% subhorizontal elongation within the foliation. Folding of the mélange fabric is shown by local development of small‐scale, steeply plunging isoclinal folds that have reclined geometry, and local development of a crenulation fabric. This reflects shear strain during activation of the broken formation zones as fault zones. Sandstone blocks within the mélange are characterised by subrounded, commonly non‐faceted terminations, and a lack of internal cataclastic deformation. Initial deformation, therefore, involved disruption of unconsolidated sediment, in which deformation was close in time to sedimentation when the sediments were not totally lithified. Associations of broken formation and a disrupted oceanic stratigraphy suggest that Tabberabbera Zone structure developed by thrusting within an oceanic setting. 相似文献
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通过深孔钻进实例，阐述了舞阳铁矿深孔钻进施工工艺及钻探事故的预防与处理技术措施，对类似矿种深孔钻进有一定的借鉴作用。 相似文献
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介绍了SYZX75型绳索取心液动锤在甘肃省肃北县德勒诺尔铁矿区坚硬、破碎地层中的应用情况，总结了该钻具在斜孔施工中的经验。实践表明，使用SYZX75型绳索取心液动锤，大幅度提高了回次进尺和钻进效率；有效克服了破碎地层的岩心堵塞，提高了破碎地层岩心采取率；有助于斜孔施工中的孔斜度控制。 相似文献
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针对河南省嵩县大王沟钼矿强烈蚀变、软硬不均、涌水漏失的复杂地层绳索取心钻进的难题,采用以套管为主、泥浆为辅的护壁措施,对钻探设备及工器具、金刚石钻头参数的选型进行了探讨,提出了腐植酸钾泥浆护壁和惰性材料堵漏的配方和配置方法,以及减小起下钻压力激动和抽吸对孔壁的破坏作用的措施,取得了较好的应用效果。 相似文献
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