共查询到20条相似文献，搜索用时 62 毫秒
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一、问题的提出D_L型水泥减阻剂的研制成功为地质钻探水泥护壁堵漏施工中改善浆液流动性、调查可泵性、满足泵送灌注要求提供了理想的水泥外加剂。通过现场生产试用表明：D_L减阻剂的应用，不仅提高了钻孔护壁堵漏的成功率，而且为安全施工、缩短候凝时间、进而间接地提高钻速、降低成本提供了有利条件和保证。在生产实践和室内探索试验中，欲合理使用水泥外加剂，需要解决的一个重要问题乃是如何选用不同品种的水泥，其次为根据水泥护壁堵漏的不同目的和条件，达到在灌注施工中满足浆液各性能（流动度、可泵性、初终凝时间，以及不同时期的强度 相似文献
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水泥在钻探工程中的应用历史起码有五十多年了。各种钻井方法均有采用水泥进行固井(油井和水井)、堵漏、护壁、封孔、止水,甚至纠斜和处理井内事故等等。实践证明,泥浆和水泥是当前复杂地层钻进中护壁堵漏的最基本材料。特别是这几年来,我国岩心钻探工作中,使用水泥护壁堵漏得到很大发展,灌注成功率越来越高。在小口径金刚石钻孔中也正在逐步推广应用。我国水泥工业生产了许多新的水泥品种(如快硬早强水泥、矾土水泥等等)和新的水泥速凝早强剂(如红星一号、711型等),为岩心钻探注水泥护壁堵漏工作,提供了有 相似文献
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大水灰比水泥浆-水玻璃速效灌浆堵漏法，是我队通过帷幕灌浆之后，结合钻探施工中钻孔堵漏特点，将岩石基础灌浆法引用于岩心钻探钻孔护壁堵漏。通过某金矿区试验，效果很好。其优点是时间短，见效快，成功率高，材料消耗少。有效地避免了采用较大颗粒的惰性材料堵漏中，经常出现的一堵就返水，一钻又漏的情况，深受机台人员的欢迎。1．堵漏原理 主要是靠送入较大的水灰比（3∶1—0.5∶1）的水泥浆，在注浆泵的压力作用下，向钻孔裂隙中（漏失部位）压入。因浆液水灰比较大，水泥颗粒细小，易被挤进细小的裂隙中去，随着扩展面 相似文献
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复杂地层钻探堵漏浆液的研究与应用 总被引：8，自引：0，他引：8
在钻进复杂地层的过程中,漏失会造成冲洗液不同程度的流失,失去冲洗液的功能,导致钻进困难,钻速下降,以致孔壁坍塌发生卡钻、埋钻事故。此外,如遇到高气压层、水气,也可能发生喷气和涌水事故。为了确保安全钻进,必须采取一定的技术措施以防止冲洗液的漏失。泥浆是一种常规的护壁堵漏的措施,但对于坍塌漏失较严重的情况,就必须采用其它材料进行堵漏。本试验采用复合水泥浆液进行堵漏,对浆液中加入的处理剂与浆液性能改变之间的关系进行分析总结,主要对浆液的凝结时间、流动度、析水率等方面进行研究,再进行多组试验得出用以解决复杂地层堵漏的浆液优化配方。 相似文献
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采用泥浆-水泥-水玻璃胶质浆液灌浆堵漏工艺处理裂隙发育的超深孔浆液严重漏失问题;对堵漏机理、方法进行理论分析;结合现场应用情况谈几点认识,并对该工艺进行了经济效益评价。 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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Inter-regional correlation of transgressions and regressions in the Cretaceous period 总被引：1，自引：0，他引：1
T. Matsumoto 《Cretaceous Research》1980,1(4):359-373
Well investigated platforms have been selected in each continent, and the history of Cretaceous transgressions and regressions there is concisely reviewed from the available evidence. The factual records have been summarized into a diagram and the timing of the events correlated between distant as well as adjoining areas.On a global scale, major transgressions were stepwise enlarged in space and time from the Neocomian, via Aptian-Albian, to the Late Cretaceous, and the post-Cretaceous regression was very remarkable. Minor cycles of transgression-regression were not always synchronous between different areas. Some of them were, however, nearly synchronous between the areas facing the same ocean.Tectono-eustasy may have been the main cause of the phenomena of transgression-regression, but certain kinds of other tectonic movements which affected even the so-called stable platforms were also responsible for the phenomena. The combined effects of various causes may have been unusual in the Cretaceous, since it was a period of global tectonic activity. The slowing down of this activity followed by readjustments may have been the cause of the global regression at the end of the Cretaceous. 相似文献
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The Afyon stratovolcano exhibits lamprophyric rocks, emplaced as hydrovolcanic products, aphanitic lava flows and dyke intrusions, during the final stages of volcanic activity. Most of the Afyon volcanics belong to the silica-saturated alkaline suite, as potassic trachyandesites and trachytes, while the products of the latest activity are lamproitic lamprophyres (jumillite, orendite, verite, fitztroyite) and alkaline lamprophyres (campto-sannaite, sannaite, hyalo-monchiquite, analcime–monchiquite). Afyon lamprophyres exhibit LILE and Zr enrichments, related to mantle metasomatism. 相似文献
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正20140751 Guo Xincheng(Geological Party,BGMRED of Xinjiang,Changji 831100,China);Zheng Yuzhuang Determination and Geological Significance of the Mesoarchean Craton in Western Kunlun Mountains,Xinjiang,China(Geological Review,ISSN0371-5736,CN11-1952/P,59(3),2013,p.401-412,8 相似文献
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正20141058 Chen Ling(Key Laboratory of Mathematical Geology of Sichuan Province,Chengdu University of Technology,Chengdu610059,China);Guo Ke Study of Geochemical Ore-Forming Anomaly Identification Based on the Theory of Blind Source Separation(Geosci- 相似文献
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正20141334 Chen Kun(Institute of Geophysics,China Earthquake Administration,Beijing100081,China);Yu Yanxiang Shakemap of Peak Ground Acceleration with Bias Correction for the Lushan,Sichuan Earthquake on April20,2013(Seismology and Geology,ISSN0253-4967,CN11-2192/P,35(3),2013,p.627-633,2 illus.,1 table,9 refs.)Key words:great earthquakes,Sichuan Province 相似文献
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正20141624 Cai Xiongfei(Key Laboratory of Geobiology and Environmental Geology,Ministry of Education,China University of Geosciences,Wuhan 430074,China);Yang Jie A Restudy of the Upper Sinian Zhengmuguan and Tuerkeng Formations in the Helan Mountains(Journal of Stratigraphy,ISSN0253-4959CN32-1187/P,37(3),2013,p.377-386,5 illus.,2 tables,10 refs.) 相似文献
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正20142263Lü Shaojun(Geological Survey of Jiangxi Province,Nanchang 330030,China)Early-Middle Permian Biostratigraphical Characteristics in Qiangduo Area,Tibet(Resources SurveyEnvironment,ISSN1671-4814,CN32-1640/N,34(4),2013,p.221-227,2illus.,2tables,22refs.)Key words:biostratigraphy,Lower Permian,Middle Permian,Tibet 相似文献
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正20142560Hu Hongxia(Regional Geological and Mineral Resources Survey of Jilin Province,Changchun 130022,China);Dai Lixia Application of GIS Map Projection Transformation in Geological Work(Jilin Geology,ISSN1001-2427,CN22-1099/P,32(4),2013,p.160-163,4illus.,2refs.) 相似文献
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正20140692 Duo Tianhui(No.402 Geological Team,Exploration of Geology and Mineral Resources of Sichuan Authority,Chengdu611730,China);Wang Yongli Computer Simulation of Neptunium Existing Forms in the Groundwater(Computing Techniques for Geophysical and Geochemical Exploration,ISSN1001-1749,CN51-1242/P,35(3), 相似文献