PVA1788成膜体系无固相冲洗液在桂柳地1井的应用

桂柳地1井为广西柳州市鱼峰区雒容镇区块页岩气地质调查井,设计井深2350 m,钻遇水敏性地层等复杂地层。为了提高无固相冲洗液在页岩气复杂地层深孔钻进中维持孔壁稳定的能力,在PVA1788体系无固相冲洗液的基础上,添加成膜A剂、封堵剂GFD-1等处理剂。根据冲洗液试验及现场应用,成膜A剂具有降失水功能,不影响冲洗液的润滑性能,对粘度影响不明显,该PVA1788成膜体系无固相冲洗液滤失量较低,封堵裂隙效果好,减弱了地层水化膨胀,提高了成膜抑制防塌能力,满足了桂柳地1井深孔复杂地层维护孔壁稳定、安全钻进的需要。对类似复杂地层无固相冲洗液的推广应用具有参考价值。     

PVA无固相冲洗液在吉林珲春松林油页岩矿区水敏地层中的应用

详细介绍了PVA冲洗液特点,护壁机理,对钻进技术效果进行了分析评价,结果表明PVA无固相冲洗液结合套管浅部护壁,对于复杂地层钻进其护壁、堵漏是一种既经济又有效的处理方法。     

PVA无固相冲洗液在吉林珲春松林矿区复杂地层的应用

详细介绍了PVA的基本性能，及其护壁机理，并和PHP-KHm冲洗液比较，对钻进技术效果和经济效益进行了分析评价，结果表明，PVA无固相冲洗液对于复杂地层钻进中的护壁、堵漏是一种既经济又有效的处理方法。     

聚炳烯酰胺无固相冲洗液在复杂地层中的应用研究

根据多年对聚丙烯酰胺无固相冲洗液钻进技术在地质岩心钻探中的应用情况,进一步分析聚丙烯酰胺无固相冲洗液钻进所具有的技术优势,以及如何发挥其优势,利用聚丙烯酰胺无固相冲洗液钻进水敏地层及其它复杂地层,解决难以钻进的问题。同时,为进一步完善、选择适宜的钻井冲洗液提供一些可供借鉴的建议,使该技术的快速发展和地质岩心钻探钻进技术全面提高。     

PHP-CORESMART无固相冲洗液在风化煌斑岩地层中的应用

风化煌斑岩是一种水敏性不稳定地层,钻进过程中常常引起孔壁坍塌,造成卡埋钻等孔内事故。根据风化煌斑岩地层岩性特点及钻进时遇到的问题,对风化煌斑岩地层冲洗液护壁技术进行了大量的试验研究工作,研制了PHP-CORESMART无固相冲洗液。该冲洗液由PHP、Na-CMC和CORESMART等配制而成,是一种具有较强抑制性和成膜性的冲洗液体系,在九瑞矿集区风化煌斑岩地层中应用,取得了比较满意的技术经济效果。     

无固相冲洗液在深溪锰矿施工中的应用

贵州深溪锰矿普（详）查区钻探钻遇较为复杂的水敏性地层、破碎性岩层,在合理选择好钻探设备、钻进参数和正确操作的前提下,选用PHP-GSP和GPLS植物胶两类无固相冲洗液,有效地预防了钻孔缩径、孔壁坍塌,降低了钻具与孔壁的摩擦阻力,从而达到了预防孔内事故的目的;同时还提高了机械钻速、减少了冲洗液材料运输量,提高了钻探经济效益;此外还具有环保等优点。介绍了PHP-GSP和GPLS植物胶无固相冲洗液的作用机理、配制方法及使用注意事项等。     

MY-ⅠA型无固相交联冲液洗的研究与应用

具有护壁作用的无固相冲洗液的研究与应用,对发展金刚石钻进、孔底动力钻具钻进和水井钻进等都有重大意义.碱处理MY-1型无固相冲洗液,具有低失水及稳定孔壁等良好性能,在我国许多地质队的初步应用,已取得一定的效果;但它仍然存在加碱后粘度降低,不能满足钻进一些无胶结的破碎岩层的要求.为此,我院进     

依靠科技进步，不断完善绳索取心钻进工艺

针对绳索取心钻进工艺技术在福建煤系地层推广应用中存在的问题，加强了在钻孔口径、钻具级配、冲洗液配制以及护孔堵漏工艺方面的研究。实践证明：Ф77口径绳索取心能够降低泵压，稳定孔壁；采用三级配套，可以解决硬质砂岩等地层的钻进难题；在弱研磨地层，选用SH型“防打滑”钻头可提高钻效；使用非分散低固相冲洗液和无固相冲洗液，具有携粉护壁及防垢能力；惰性材料、DTR材料及改性沥青泥球，可适用于福建地区各种漏失类型的堵漏作业。     

无固相冲洗液在复杂地层钻进中的应用

钻进松散、破碎、坍塌、水敏等复杂地层，最常用的护壁办法是用泥浆和下套管。穿过复杂地层对泥浆性能要求很高，稍有疏忽就会导致孔内事故，从而增加了其使用难度。无固相冲洗液以其高分子聚合物吸附能力强、胶结性能好、配制使用简便等特点，为解决这些复杂地层钻进问题提供了新的途径。在几个典型矿区分别应用DWY-Ⅱ型、PAA和HJ-l三种无固相冲洗液，成功地解决了复杂地层钻进中护壁、取心等技术难题。     

PHP—水玻璃无固相冲洗液的护壁作用机理和凝聚堵漏的研究

一、PHP—水玻璃无固相冲洗液的护壁作用机理 PHP——水玻璃无固相冲洗液起固壁作用的主要成分是水玻璃,其良好的护壁性能已被生产实践所证实,尤其是在水敏性地层、孔隙小的细砂层、含断层泥的断裂带等岩层中钻进护壁效果更好。 1.水球璃及其固壁作用常用的液体钠水球璃是一种混合物,其申包括钠的硅酸盐、无定形二氧化硅、水合     

The terrestrial fauna of the Late Triassic Pant-y-ffynnon Quarry fissures,South Wales,UK and a new species of Clevosaurus (Lepidosauria: Rhynchocephalia)

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.     

Définition d'une limite multicritère ; stratigraphie du passage Campanien–Maastrichtien du site géologique de Tercis (Landes,SW France)Definition of a multi-criteria boundary; stratigraphy of the Campanian–Maastrichtian interval of the geological site at Tercis (Landes,SW France)

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.     

The effect of water on accessory phase solubility in subaluminous and peralkaline granitic melts

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.     

Quaternary stresses revealed by calcite twinning inversion: insights from observations in the Savonnières underground quarry (eastern France)

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).     

HYDROGEOLOGY

正20141756 Chen Ruige(Mathematical College,China University of Geosciences,Beijing100083,China);Zhou Xun Numerical Simulation of Groundwater Level Fluctuation in a Coastal Confined Aquifer with Sloping Initial Groundwater Level Induced by the Tide(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(7),2013,p.1099-1104,6 illus.,16 refs.) Key words:confined water,groundwater level     

METAMORPHIC PETROLOGY

正20141408 Cai Jia(Institute of Geology,Chinese Academy of Geological Sciences,Beijing100037,China);Liu Fulai Petrogenesis and Metamorphic P-T Conditions of Garnet-Spinel-Biotitebearing Paragneiss in Danangou Area,Daqingshan-Wulashan Metamorphic Complex Belt(Acta Petrologica Sinica,ISSN1000-0569,CN11-1922/P,29(7),     

SERIALS

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GEOPHYSICAL EXPLORATION

正20142386An Guoying(China Aero Geophysical Survey and Remote Sensing Center for Land and Resources,Beijing 100083,China)Application of Satellite Remote Sensing in Regional Hydrogeological Investigation:Taking Cenozoic Strata in Wenquan Sheet(1∶250 000)of Karakoram Range as an Example(Geosci-     

QUATERNARY GEOLOGY & GEOMORPHOLOGY

正20141016An Chengbang(Key Laboratory of Western China’s Environmental Systems,Ministry of Education,Lanzhou University,Lanzhou 730000,China);Zhao Yongtao Lake Records during the Last Glacial Maximum from Xinjiang,NW China and Their Climatic Impli-     

PETROLEUM GEOLOGY

正20141538 Cao Qing(School of Earth Sciences and Engineering,Xi’an Petroleum University,Xi’an 710065,China);Zhao Jingzhou Characteristics and Significance of Fluid Inclusions from Majiagou Formation,Yichuan Huangling Area,Ordos Basin(Advances in Earth Science,ISSN1001-8166,CN62-1091/P,28(7),2013,p.819-828,7 illus.,3 tables,43 refs.)