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題名 | 竹苗地區石底層與木山層之儲集岩研究=Reservoir Study of the Shihti and the Mushan Formations in the Hsinchu-Miaoli Area |
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作者 | 莊恭周; 周定芳; Chuang, Kung-chou; Chou, Ting-fang; |
期刊 | 臺灣石油地質 |
出版日期 | 19981200 |
卷期 | 32 1998.12[民87.12] |
頁次 | 頁187-210 |
分類號 | 452.7 |
語文 | chi |
關鍵詞 | 竹苗地區; 臺灣; 石底層; 木山層; 儲集岩; |
中文摘要 | 本研究針對竹苗地區中新統之石底層與木山層進行井下岩心之成岩作用與電測資料之特性分析,期能描繪出研究區內此二地層之儲集特性與分佈,以利本公司今後在該地區從事油氣的探勘與開發。 石底層之儲集性質在B地區受沈積環境控制,出磺坑地區則受裂縫作用與次生孔隙控制,儲集性質均良好。鐵站山地區受壓密作用、局部之裂縫作用與次生孔隙影響,錦水與永和山地區則受自生性黏土礦物種類影響,儲集性質皆屬中等。寶山地區除中段砂層因成岩作用產生次生孔隙,儲集性質稍佳,其餘砂層與青草湖、細道邦地區因岩層受力擠壓,孔隙率與滲透率均低,儲集性質均不佳。 木山層在竹苗地區均較緻密,在B地區之儲集性質受砂岩中自生性黏土礦物種類影響,出磺坑地區除自生性黏土礦物的影響外,尚受次生孔隙與裂縫作用控制,儲集性質良好。鐵站山地區則受砂層之膠結作用與自生性黏土礦物控制,錦水地區則受次生孔隙、膠結作用與裂縫作用影響,除錦水第28層之儲集性質較佳外,其餘儲菜性質均屬中等。 寶山、青草湖、八卦力與細道邦等地區,均因地層埋壓較深或受力擠壓,致使岩性緻密、孔隙率低,儲集性質均不佳。 綜合砂層厚度、埋壓深度、孔隙率與成岩作用特性,竹苗地區石底層與木山層儲集性質最佳之地區為海域B地區與陸域出磺坑地區,其次是錦水一鐵玷山一BE地區一帶,建議在此地區尋找適宜之構造進行鑽探。 |
英文摘要 | In order to enhence the oil and gas production and exploration of the Hsinchu-Miaoli area, it is important to make detailed study of the reservoir quality. This study selects the Shihti Formation and the Mushan Formation as the target reservoirs and delineates the diagenetic effect of the reservoir qualities. The controlling factors of the reservoir quality of the Shihti Formation in the study area are various in different structures. In the B area, the primary porosity was well preserved due to the shallow burial. In the Chuhuangkeng structure, the fracturing and the cement dissolution enhence the reservoir quality. In the Tiehchenshan structure, the reservoir quality was affected by compaction, partial fracturing and secondary porosity due to the dissolution of cements. In the Chinshui and the Yunghoshan structures, the reservoir qualities were affected by the authigenetic clays in sandstones. In the Paoshan and the Chingtsaohu structures, the reservoir qualities were destroyed by compaction and cementation. In the Hsitaopang structure, the reservoir quality was poor due to strong compaction. The Mushan Formation in the study area are well compacted. Therefore, the abundance of the secondary porosity and the authigenetic clays in sandstone are the major controlling factors of the reservoir quality. In the B area, the reservoir quality was controlled by the type of authigenetic clays in sandstone. In the Chuhuangkeng structure, except the influence of the authigenetic clays, the secondary porosity and the fracturing are also important to the reservoir qualities. In the Tiehchenshan structure, the reservoir quality was destroyed by the authigenetic clays and the calcite cements in sandstone. In the Chinshui structure, the reservoir quality was affected by secondary porosity, cementation and fracturing. In the Paoshan, the Chingtsaohu, the Pakuali and the Hsitaopang structures, the reservoirs are well compacted and the low reservoir porosity also due to deep burial. Integration of the sandstone thickness, burial depth, porosity and diagenetic characteristics, the good reservoir region of the Shihti and the Mushan Formations in the Hsinchu-Miaoli area can be defined. The best choice is the onshore Chuhuangkeng structure and the offshore B area. The second is the Chinshui-Tiehchenshan-BE belt. It is worthy of drilling wells if accompanied with suitable structures in these area. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。