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松辽盆地科学钻探工程松科二井东孔上白垩统地球物理测井科学成果 被引量:10
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作者 邹长春 张小环 +8 位作者 赵金环 彭诚 张淑霞 李宁 肖亮 牛一雄 丁娱娇 秦宇星 林峰 《地球学报》 EI CAS CSCD 北大核心 2018年第6期679-690,共12页
松辽盆地科学钻探工程是围绕地球深部资源、古环境与古气候等一系列重要地球科学问题而实施的重大科学工程。作为该工程的主体钻孔,松科二井东孔设计为松辽盆地最深钻孔,设计深度6 400.0 m,计划穿透白垩系地层、钻至盆地基底。由于上白... 松辽盆地科学钻探工程是围绕地球深部资源、古环境与古气候等一系列重要地球科学问题而实施的重大科学工程。作为该工程的主体钻孔,松科二井东孔设计为松辽盆地最深钻孔,设计深度6 400.0 m,计划穿透白垩系地层、钻至盆地基底。由于上白垩统井段取心量非常少,因此地球物理测井的作用尤为重要。该孔正式开钻后,采用先进的成像测井设备对一开和二开钻井井段(上白垩统井段)先后实施4次裸眼井综合测井和套管井测井作业,并系统地开展测井综合评价,取得以下科学成果:(1)原位获取了常规测井、特殊测井和固井质量检查测井资料共20种,资料丰富、质量优良,建立了上白垩统连续的岩石物理参数标准剖面;(2)完成了上白垩统地层划分、岩性识别、沉积和构造精细解释;(3)识别出泉头组油气储层、嫩江组和青山口组烃源岩层、嫩江组高放射性异常层,以及上白垩统地热开发潜力层;(4)探索了青山口组古气候分析的有利测井指标;(5)及时提供准确的井径、钻孔轨迹和固井质量等关键钻探工程信息。研究成果对于松辽盆地地球物理勘探科学"标尺"建立、古环境与古气候研究、钻探工程施工起到至关重要的作用,为整个钻探工程科学目标的实现奠定良好基础。 展开更多
关键词 松辽盆地 大陆科学钻探工程 松科二井东孔 上白垩统地层 地球物理测井
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FIRST AMMONITE AND INOCERAMID DATA FROM THE UPPER CRETACEOUS OF THE TINGRI SECTION IN SE-TIBET:BIOSTRATIGRAPHICAL AND PALAEOENVIRONMENTAL IMPLICATIONS
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作者 Jens LEHMANN Ines WENDLER +2 位作者 Jens WENDLER Helmut WILLEMS Xiumian HU 《地学前缘》 EI CAS CSCD 北大核心 2005年第2期105-112,共8页
A section in the Zhepure Mountains near Old Tingri in SE-Tibet,ranging from the Upper Albian to Paleogene,was described in detail by Willems et al.(1996).These authors worked on the litho-and microfacies and set up th... A section in the Zhepure Mountains near Old Tingri in SE-Tibet,ranging from the Upper Albian to Paleogene,was described in detail by Willems et al.(1996).These authors worked on the litho-and microfacies and set up the biostratigraphical framework by planktonic foraminifera.Willems et al.(1996)established their section as a standard for southern Tibet and compared it to the Gamba area.During the 2004 Tibet-expedition of Chengdu University of Technology in China,in co-operation with Bremen and Kiel universities in Germany,the locality was revisited for the purpose of collecting invertebrate fossils.This field-work included only the Upper Cretaceous part of the Tingri section and its invertebrate faunal content.Until today almost no ammonite and inoceramid data existed for this section.This is true for most Cretaceous sections in Tibet,although the Upper Cretaceous succession was interpreted as shelf environment.which in other parts of the world contains rich faunas of these macrofossil groups.The newly discovered continuous record of rare ammonites and inoceramids is probably limited since the preservation in the wacke-and packstones is poor.In addition,sampling conditions were unfavorable and the environmental conditions disadvantageous for most groups of invertebrates,as possibly indicated by larger amounts of small bivalve debris(filaments)in the upper part of the Gamba Group.Although the collected fauna is sparse and poorly preserved,the following biostratigraphical data can be added to the hitherto described microfauna:Calycoceras?from the Upper Gamba Group is Late Cenomanian in age and is accompanied by indeterminable juvenile desmoceratids.Superjacent follows a record of the ammonite Forresteria sp.,indicating that this level in the upper part of the Gamba Group belongs to the Lower Coniacian.This supports the finding of Inoceramus(Cremnoceramus)waltersdorfensis?hannovrensis?from the same interval.Anagaudryceras?is an individual ammonite finding from the Zhepure Shanbei or Zhepure Shanpo Formation,corresponding to the Santonian-Maastrichtian part of the succession. 展开更多
关键词 ammonite inoceramid Upper Cretaceous BIOSTRATIGRAPHY PALAEOENVIRONMENT Tingri MAASTRICHTIAN TIBET
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