發(fā)布時間：2018-02-23 19:16

  本文關(guān)鍵詞： 基準(zhǔn)面旋回 向上變厚旋回 沉積模式 高分辨率層序地層學(xué) 深水濁積朵葉體 克萊爾盆地 愛爾蘭　出處：《石油與天然氣地質(zhì)》2017年01期 　論文類型：期刊論文

【摘要】：應(yīng)用高分辨率層序地層學(xué)原理和分析方法,通過對愛爾蘭西海岸Ross Sandstone組深水濁積朵葉體露頭的詳細(xì)研究,基于側(cè)向穩(wěn)定展布的泥巖段、沉積構(gòu)造與巖相組合、砂巖融合的程度以及沉積物的樣式與厚度4個方面,建立了研究區(qū)高分辨率層序地層格架,探討了深水濁積朵葉體的沉積模式及不同層次基準(zhǔn)面旋回的控制因素。研究表明,富含有機質(zhì)與棱菊石化石的遠(yuǎn)洋泥巖是長期基準(zhǔn)面旋回的界面。在長期旋回內(nèi),側(cè)向展布數(shù)千米至數(shù)萬米的薄層泥巖夾粉砂巖是中期基準(zhǔn)面旋回的界面。每一個中期旋回都由數(shù)個相互疊置的向上變厚旋回組成,單個向上變厚旋回通常由底部薄層泥巖夾粉砂巖開始,往上逐漸轉(zhuǎn)變?yōu)楹駥拥臒o構(gòu)造砂巖;其厚度通常為0.5~7 m,并可穩(wěn)定延伸數(shù)百米至數(shù)千米,反映了朵葉體的持續(xù)前積作用。
[Abstract]:Based on the high resolution sequence stratigraphy principle and analysis method, a detailed study of the outcrop of the deep-water turbidite leaf bodies of the Ross Sandstone formation on the west coast of Ireland, the sedimentary structure and lithofacies combination of the laterally stable spreading mudstone segment are presented. In this paper, the high resolution sequence stratigraphic framework of the studied area is established, and the sedimentary model of the turbidite leaf body in deep water and the controlling factors of the base-level cycle at different levels are discussed in the four aspects of the degree of sandstone fusion and the pattern and thickness of the sediment. The pelagic mudstone, which is rich in organic matter and permethrin fossils, is the interface of the long-term base-level cycle. A thin layer of mudstone siltstone with a lateral spread of thousands to tens of thousands of meters is the interface of the intermediate base-level cycle. Each intermediate cycle consists of several superimposed upward thickening cycles. The single upward thickening cycle usually begins with the thin mudstone intercalated siltstone at the bottom and gradually changes up to the thick non-structural sandstone, which is usually 0.57m thick and can extend steadily from several hundred meters to several thousand meters, reflecting the continuous pre-accumulation of the flower leaf body.
【作者單位】： 北京大學(xué)地球與空間科學(xué)學(xué)院;甘肅省油氣資源研究重點實驗室/中國科學(xué)院油氣資源研究重點實驗室;中國石油長城鉆探工程技術(shù)研究院;中國地質(zhì)大學(xué)(北京)能源學(xué)院;
【基金】：中國博士后科學(xué)基金資助項目(2016M591016)
【分類號】：P618.13;P539.2
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本文編號：1527292