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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/65229

    Title: 以三維震測調查桃科園區CCS井址地下構造;A 3D Seismic Study around a CCS Drill Site
    Authors: 管卓康;Guan,Zhuo-kan
    Contributors: 地球科學學系
    Keywords: 二氧化碳封存;三維震測;環炸法
    Date: 2014-08-26
    Issue Date: 2014-10-15 14:44:06 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 以三維震測調查桃科園區CCS井址地下構造

    相較於傳統油工業的震測探勘,高解析度反射震測的探勘範圍較小,探測深度也較淺,但是可以清楚地描繪細部的構造,在淺層的地層分層較為細緻。野外施測部分,本研究使用的震源為震盪震源車(MiniVib),受波器選用40Hz Geophone,程陣列布置,共放置12條平行線,每條48顆受波器,受波器間距4公尺,線間距16公尺。使用重合方格大小為8*8公尺,可解析範圍約800*600公尺。炸點使用環炸法布置:受波器沿預計井址布置,震盪震源車則圍繞受波器陣列,在桃科園區內道路上施測,使波線完整包覆各個方位角,有良好的資料品質,即使在3000公尺深也可以解析出厚度僅4公尺的地層反射訊號,不僅能夠調查細部的地下構造,還能夠作為二氧化碳灌注後移棲行為的監測。
    ;A 3D Seismic Study around a CCS Drill Site
    The reduction of CO2 emission to lessen the global warming has become an important issue in recent years. The capture of CO2 during its manufacturing process in the electric power plant and storing in the adjacent area is considered to be an economical and feasible way. This research uses the 3D high-resolution seismic reflection method to investigate a possible CCS site along the coast in Taiwan. The site is near an electric power plant and is planned to be a CCS experiment laboratory. The main objective is to detect the proper geologic structure and to prepare the baseline data for the future CO2 monitoring.
    The size of the high-resolution method applied in this study is much smaller than that used in the oil exploration. The obtained high quality and high resolution data can resolve very detailed structures. The Minivibe is used as a source with 576 40Hz-geophones. The bin size is 8m x 8m with an average fold of 30. A surrounding type of 3D data acquisition was taken with sources on the outside roads and receivers fixed around the planned drill site. The structural layer as thin as 4m is able to be detected even under a depth of 3000m. Such a high resolution allows us not only to estimate the structure, but also able to monitor the migration of CO2 after storage.
    The results of seismic measurement after comparing with a nearby borehole data show that : 1) the caprock is Chinshui shale which is at the depth of 880~1000m, 2) the Nanchuang formation and Kueichulin formation with high porosity can be proper reservoir layers which are located at the depth between 1000m to 1700m. In conclusion, this site has good caprocks, thick reservoirs with high porosity and, most important, at suitable depths. This could be a good CCS site. Very detailed layered structures with dipping angle of 2.3 degrees opposite to the sea direction are revealed. It means that if CO2 are injected in this reservoir, it may migrate toward Taiwan Strait.
    Appears in Collections:[地球物理研究所] 博碩士論文

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