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高温盐水钻井液技术难点及国内外研究现状 总被引：3，自引：0，他引：3
在分析高温盐水钻井液面临的主要问题的基础上,对国内外抗高温、抗污染钻井液处理剂及钻井液体系的研究与应用情况进行了介绍。深井、超深井钻探中会面临各种复杂情况,因此对钻井液抗温、抗污染能力的要求也越来越高,主要技术难点是高温高压及高污染条件下对钻井液流变性、滤失量、腐蚀性的控制。耐260℃以上抗高温、抗盐处理剂及体系,耐高温钻井液测试仪器是未来抗高温钻井液发展的方向。 相似文献
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松科二井完钻井深为7108.88 m;完钻时停止钻井液循环后38 h,实测井底温度241℃。针对地层和温度情况,研究出了3种高温水基钻井液:抗温180℃的氯化钾聚磺钻井液;抗温230℃的高温聚合物钻井液;抗温250℃超高温的甲酸盐聚合物钻井液。其中,250℃钻井液以新型高温稳定剂为核心处理剂,凹凸棒土与钠膨润土黏土相,形成了新型甲酸盐聚合物体系。数据表明这几种钻井液具有良好的高温稳定性和较低的高温高压滤失量。工程现场的钻井液实验室结合取心作业特点,实时测试评价现场井浆的常规性能,同时监测井浆的抗温能力和高温流变性,根据实验数据和现场工况针对性的对井浆进行维护、调整,确保高温井段取心作业期间钻井液具有良好的性能。且在长时间裸眼、多次起下钻的工况下井壁稳定,测井、固井作业均得以顺利进行。各体系钻井液在转换时实现了安全平稳的过渡,极大的节约了成本。 相似文献
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近年来高密度钻井液随深井钻井技术取得了较大的发展，成功地解决了深井高温、高压、高盐、多套压力系统环境的防漏、防喷、防卡、防盐、防钙、防硫化氢及破碎垮塌地层抑制，高固相条件下流变性和沉降稳定性控制等问题。高密度钻井液加重材料的选择与性能控制已成为深井钻井的关键技术。介绍了高密度钻井液的应用情况。 相似文献
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堇青石是一种具有较低热膨胀系数、良好抗热震性的矿物材料。天然的堇青石矿物原料很少,因此常常采用人工合成的方法来合成堇青石材料。本文根据近年来合成堇青石的最新研究,论述了堇青石合成方法的研究进展,具体包括高纯氧化物高温固相反应合成法、天然矿物高温固相反应合成法、利用工业废料合成法、利用农业废料合成法、溶胶-凝胶法和低温燃烧合成法。目前工业化生产堇青石大多采用天然矿物高温固相反应法,此法虽有众多优点,但同时也存在许多的不足之处。因此,如何能将其他方法用于工业化生产,将成为合成堇青石今后研究中的一个发展方向。 相似文献
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位于南海西部的莺歌海-琼东南盆地（下称:莺-琼盆地）具有井底压力与温度双高、安全作业密度窗口极窄等特点,在高温高压工况下引发钻井液流变性难以控制、井下恶性漏失、电测仪器阻卡和储层保护难度大等情况.因此,基于此区块复杂的地质条件,经过多次的室内试验研究,在常规聚磺高温高压水基钻井液的基础上,通过引入甲酸钾作为配方抑制剂,同时优选抗高温聚合物以及磺化钻井液材料,在提高了体系的抑制性同时,有效地降低了钻井液的活度,并且通过加重材料的优选,钻井液的流变性得到了改善,使得体系具有较低的高温高压滤失量,密度2.5 g/cm3的体系可以抗高温达240℃.现场实践表明,新型高温高压水基钻井液体系具有良好的抗高温性和流变性,较低的高温高压滤失量,优良的滤饼质量,同时根据电缆测井井壁取心结果,此新型水基钻井液体系的储层保护效果良好. 相似文献
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超深井高温钻井液技术概况及研究方向的探讨 总被引：7，自引：0，他引：7
[摘 要] 我国未来深部大陆科学钻探深度为12000m ～ 13000m,井底温度将达到350℃以上,钻井液将面临超高温高压环境,钻井液技术将面临严峻考验。本文重点介绍了国内外典型深井及超深井钻探和高温地热井钻探钻井液使用情况,提出了抗高温钻井液的主要技术难点是高温高压及污染条件下钻井液流变性、滤失量、润滑性控制。耐温250℃以上钻井液处理剂及体系、耐高温钻井液试验仪器和地面循环降温系统是超高温钻井液技术研究方向。 相似文献
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以过硫酸钾为引发剂,通过水溶液聚合法制得了丙烯酸和丙烯酰胺的聚合物A。用聚合物A作为有机改性剂,采用混炼挤压法制备得到样品。用X射线衍射(XRD)、红外光谱(FT-IR)、扫描电子显微镜(SEM)等方法对其结构形貌进行研究。结果表明,其晶面间距由原来的1.269 nm增大到1.322 nm,有机基团进入层间,并且仍保持层状结构,成功制备出了有机改性膨润土。用有机改性膨润土配制钻井液,当其质量分数为4%时,浆液的粘度为5.5 mPa.s,滤失量为13 mL,润滑系数为0.13。与普通钠基膨润土钻井液相比,有机改性膨润土钻井液的滤失量和润滑系数均有较大幅度降低,并且改善了钻井液的流变性。 相似文献
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Emily Keeble David I. Whiteside Michael J. Benton 《Proceedings of the Geologists' Association. Geologists' Association》2018,129(2):99-119
Pant-y-ffynnon Quarry in South Wales yielded a rich cache of fossils in the early 1950s, including articulated specimens of new species (the small sauropodomorph dinosaur Pantydraco caducus and the crocodylomorph Terrestrisuchus gracilis), but no substantial study of the wider fauna of the Pant-y-ffynnon fissure systems has been published. Here, our overview of existing specimens, a few described but mostly undescribed, as well as freshly processed material, provides a comprehensive picture of the Pant-y-ffynnon palaeo-island of the Late Triassic. This was an island with a relatively impoverished fauna dominated by small clevosaurs (rhynchocephalians), including a new species, Clevosaurus cambrica, described here from a partially articulated specimen and isolated bones. The new species has a dental morphology that is intermediate between the Late Triassic Clevosaurus hudsoni, from Cromhall Quarry to the east, and the younger C. convallis from Pant Quarry to the west, suggesting adaptive radiation of clevosaurs in the palaeo-archipelago. The larger reptiles on the palaeo-island do not exceed 1.5?m in length, including a small carnivorous crocodylomorph, Terrestrisuchus, and a possible example of insular dwarfism in the basal dinosaur Pantydraco. 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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The effect of water on accessory phase solubility in subaluminous and peralkaline granitic melts 总被引：4，自引：0，他引：4
The solubilities of columbite, tantalite, wolframite, rutile, zircon and hafnon were determined as a function of the water contents in peralkaline and subaluminous granite melts. All experiments were conducted at 1035 °C and 2 kbar and the water contents of the melts ranged from nominally dry to approximately 6 wt.% H2O. Accessory phase solubilities are not affected by the water content of the peralkaline melt. By contrast, solubilities are affected by the water content of the subaluminous melt, where the solubilities of all the accessory phases examined increase with the water content of the melt, up to 2 wt.% H2O. At higher water contents, solubilities are nearly constant. It can be concluded that water is not an important control of accessory phase solubility, although the water content will affect diffusivities of components in the melt, thus whether or not accessory phases will be present as restite material. The solubility behaviour in the subaluminous and peralkaline melts supports previous spectroscopic studies, which have observed differences in the coordination of high field strength elements in dry vs. wet subaluminous granitic glasses, but not for peralkaline granitic glasses. Lastly, the fact that wolframite solubility increases with increasing water content in the subaluminous melt suggests that tungsten dissolved as a hexavalent species. 相似文献
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Muriel Rocher Stéphane Baize Stéphane Jaillet Edward Marc Cushing Yannick Lozac&#x;h Francis Lemeille 《Comptes Rendus Geoscience》2003,335(8):701-708
Calcite samples were extracted both from the rock matrix and the superficial coating of a karstified fault plane of an underground quarry, located in the eastern border of the Paris basin. The karstification is dated as Quaternary. Analysis of mechanical calcite twinning reveals that only the calcite matrix has also undergone a compression trending WNW that can be attributed to the Mio-Pliocene alpine collision. Both coating and matrix have undergone a strike-slip regime with σ1 roughly trending north–south, that could correspond to the regional present-day state of stress, a strike-slip compression rather trending NNW, modified by local phenomena. To cite this article: M. Rocher et al., C. R. Geoscience 335 (2003). 相似文献
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正20141520 Bo Ying(Key Laboratory of Metallogeny and Mineral Assessment,MLR,Beijing 100037,China);Liu Chenglin Saline Spring Hydrochemical Characteristics and Indicators for Potassium Exploration in Southwestern and Northern Tarim Basin,Xinjiang(Acta Geoscientica Sinica,ISSN1006-3021,CN11-3474/P,34(5),2013,p.594-602,5 illus.,3 tables,28 refs.) 相似文献
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正20141243Chen Ge(Hangzhou Research Institute of Petroleum Geology,PetroChina,Hangzhou 310023,China);Si Chunsong Study on Sedimentary Numerical Simulation Method of Fan Delta Sand Body(Journal of Geology, 相似文献
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正20142599Chen Sanming(Guangxi Key Laboratory of Concealed Deposits Exploration,Guilin University of Technology,Guilin541004,China);He Yuzhou Block Model and Reserves Estimation of Panzhihua Iron Deposit Based on 3D Geological Modeling(Journal of Guilin University of Technology,ISSN1674-9057,CN45-1375/N,33(4),2013,p.610-615,9illus.,1table,15refs.) 相似文献
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正20140594 Bai Daoyuan(Hunan Institute of Geology Survey,Changsha 410016,China);Zhong Xiang Faults in the Jingzhou Basin and Their Tectonic Settings(Geotectonica et Metallogenia,ISSN1001-1552,CN44-1595/P,37(2),2013,p.173-183,6illus.,59refs.)Key words:basin evolution,tectonic setting,South China In the Upper Paleozoic and Jurassic se- 相似文献
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正20141912Cao Hui(State Key Laboratory for Continental Tectonics and Dynamics,Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China)Gravitational Collapse and Folding during Orogenesis:A Comparative Study of FIA Trends and Fold Axial Plane Traces(Geology in China,ISSN1000-3657,CN11-1167/P,40(6),2013,p.1818-1828,9illus.,35refs.,with 相似文献