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Tectonic evolution and accumulation characteristics of Carboniferous shale gas in Yadu-Ziyun-Luodian aulacogen, Guizhou Province, South China

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China Geology 2023年第4期6卷 646-659页

作者： Kun Yuan Wen-hui Huang Ting Wang Shi-zhen Li Xiang-can Sun Xin-xin Fang Jun-ping Xiao Jun Guo Oil and Gas Resources Survey China Geological SurveyMinistry of Natural ResourcesBeijing 100083China China University of Geosciences(Beijing) Beijing 100083China The key Laboratory of Unconventional Oil and Gas Geology China Geological SurveyBeijing 100083China Institute of Geomechanics Chinese Academy of Geological SciencesBeijing 100081China No.814 Geological Party East China Bureau of Mineral Exploration and DevelopmentZhenjiang 212005China Hunan Institute of Geophysics and Geochemistry Changsha 410000China

The Yadu-Ziyun-Luodian aulacogen(YZLA) developed into being NW-trending in the Late Paleozoic,and was considered as an important passive continental margin aulacogen in Guizhou Province, South China. This tectonic zone is considered a large intracontinental thrust-slip tectonic unit, which has undergone a long period of development. It was ultimately determined in the Yanshanian, where the typical Upper Paleozoic marine shales were deposited. In 2021, Well QSD-1 was deployed in the Liupanshui area at the northwest margin of the aulacogen, and obtained a daily shale gas flow of 11011 m3in the Carboniferous Dawuba Formation. It thus achieved a breakthrough in the invesgation of shale gas in the Lower Carboniferous in South China, revealing relatively good gas-bearing properties and broad exploration prospects of the aulacogen. Being different from the Lower Paleozoic strata in the Sichuan Basin and the Yichang area of the Middle Yangtze, the development of the Carboniferous Dawuba Formation in the aulacogen exhibits the following characteristics:(1) The Lower Carboniferous shale is thick and widely distributed, with interbedded shale and marlstone of virous thickness;(2) The total organic carbon(TOC) content of the shale in the Dawuba Formation ranges from 1% to 5%, with an average of 2%, and the thermal maturity of organic matter(Ro) varies from 1% to 4%, with an average of2.5%, indicating good hydrocarbon generation capacity;(3) The main shale in the aulacogen was formed during the fault subsidence stage from the Middle Devonian to the Early Permian. Although the strong compression and deformation during the late Indosinian-Himalayan played a certain role in destroying the formed shale gas reservoirs, comparative analysis suggests that the area covered by the current Triassic strata has a low degree of destruction. It therefore provides good conditions for shale gas preservation,which can be regarded as a favorable area for the next exploration.

关键词： Shale gas aulacogen Carboniferous Shale and marlstone Organic carbon Organic matter Hydrocarbon generation capacity Tectonic evolution Accumulation characteristics

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Seismicity of Kirov-Kazhim aulacogen

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地学前缘 2009年第S1期16卷 57-57页

作者： Noskova Natalia Udoratin Valeriy Institute of Geology of Komi Science Center of Uralian Branch Russian Academy of Sciences

In the last 200 years within the East-European platform more than 120 notable earthquakes occurred. One of the strongest earthquakes occurred in the south of Komi Republic in *** 1996 in territory of Komi Republic continuous seismic survey are conducted by station Syktyvkar(SYK).In the period of continuous survey,14 close seismic events were registered;eight of them occurred in the Kirov-Kazhim aulacogen.

关键词： earthquake epicenter aulacogen magnitude

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关于“aulacogen”的涵义

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东华理工大学学报(自然科学版) 1991年第4期 347-347页

作者：康自立

本刊1991年第2期(101页及图1)同一篇文章中使用了“裂陷槽”和“拗拉槽”两个词。据考查这两个词均源于俄语的“”(英语的译名为aulacogen)。最早由苏联学者H.C.莎特斯基(1947)引入地质文献,其原意是指从地槽沉降带伸入相邻克拉通内部... 详细信息

本刊1991年第2期(101页及图1)同一篇文章中使用了“裂陷槽”和“拗拉槽”两个词。据考查这两个词均源于俄语的“”(英语的译名为aulacogen)。最早由苏联学者H.C.莎特斯基(1947)引入地质文献,其原意是指从地槽沉降带伸入相邻克拉通内部的深槽,一般表现为受深断裂所围限的伸展型槽状断陷盆地,其间堆积有类似于冒地槽或前渊带的巨厚沉积岩系,时夹碱性玄武岩,向外逐渐过渡为地台型沉积盖层。苏联于1973年出版的《地

关键词：拗拉槽型槽拗拉谷断陷盆地地堑盆地 aulacogen

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SOME PROBLEMS ABOUT DIWA REGION

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大地构造与成矿学 1989年第1期 7-16页

作者： CHEN Guoda (Changsha Institute of Geotectonics, Academia Sinica Institvte of Diwa Theory and Metallogeny, Central-South University of Technology)

Aimed at the different views and debate in the research on diwa region, the author further elucidates the following problems: (1) the attri-bute of diwa region; (2) diwa region and activated region; (3) diwaregion and geodynamics; (4) difference and relationship between diwa and other related basins (such as rift, aulacogen and graben). The correct understanding of these problems will facilitate the further development of the diwa theory.

关键词： attribute of diwa region geodynamics rift aulacogen grabon.

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