本文關(guān)鍵詞：塔里木盆地中-下奧陶統(tǒng)鷹山組層序地層格架中的成巖作用——以塔河地區(qū)和柯坪巴楚露頭區(qū)為例　出處：《石油與天然氣地質(zhì)》2017年04期 　論文類型：期刊論文

  更多相關(guān)文章： 陰極發(fā)光 成巖作用 層序地層 鷹山組 奧陶系 塔里木盆地

【摘要】：塔里木盆地中-下奧陶統(tǒng)鷹山組內(nèi)幕儲層的成因機制是當前油氣勘探所關(guān)注的重點。以塔河地區(qū)鉆井與柯坪巴楚露頭為研究對象,利用巖石學與地球化學手段,對成巖作用在準層序、準層序組以及三級層序內(nèi)的發(fā)育規(guī)律與演化特征展開研究。研究認為:沉積相帶對成巖作用具有明顯的控制作用,海水潛流成巖作用占據(jù)潮下帶,潮間帶則以海水潛流、滲流以及淡水潛流成巖作用為特征,潮上帶以淡水滲流膠結(jié)物、同生期大氣淡水溶蝕作用為特征;退積型準層序組,準層序頂部在海平面上升早期受大氣淡水影響,海水成巖作用則在晚期主導旋回頂部;進積型準層序組,準層序在高水位早期以海水成巖作用為主,直至晚期頂部出現(xiàn)暴露;鷹山組下亞段三級層序,海平面上升期以同生期淡水成巖作用為特征,同時下傾方向膠結(jié)作用增加,高水位末期發(fā)育較弱的喀斯特;下亞段三級層序中的埋藏白云巖化作用發(fā)育強烈,云化流體以原生海水為主;上亞段三級層序在海泛面附近發(fā)育廣泛海水膠結(jié)作用,快速的海侵使得同生期淡水成巖作用發(fā)育較弱,高水位期,受裂縫控制的表生溶蝕現(xiàn)象普遍存在。
[Abstract]:The genetic mechanism of the Insider Reservoir of Yingshan formation in the Middle and Lower Ordovician in Tarim Basin is the focus of oil and gas exploration at present. Taking drilling and Kepingbachu outcrop in Tahe area as the research object, petrology and geochemistry are used. The development and evolution characteristics of diagenesis in the quasequence, quasequence and tertiary sequences are studied. It is concluded that sedimentary facies belts have obvious controlling effect on diagenesis. The subtidal diagenesis occupies the subtidal zone, while the intertidal zone is characterized by seawater undercurrent, percolation and freshwater undercurrent diagenesis, and the upper tidal zone is characterized by freshwater percolation cementation and syngenic atmospheric freshwater dissolution. The retrogressive quasi-sequence formation, the top of which is influenced by atmospheric fresh water in the early stage of sea level rise, and the top of the oceanic diagenesis in the late stage. During the early period of high water level, the diagenesis of sea water was the main factor, until the top of the late stage was exposed. The third order sequence of the lower submember of the Yingshan formation is characterized by the syngenic pale water diagenesis in the rising sea level, at the same time the cementation in the downdip direction is increased, and the karst which develops weakly at the end of the high water level; The buried dolomitization in the third-order sequence of the lower submember is strongly developed, and the clouded fluid is dominated by primary seawater. The tertiary sequence of the upper submember developed extensive sea water cementation near the flooding surface, and the rapid transgression resulted in the weak development of the synzogenic fresh water diagenesis, and in the high water level period, the phenomenon of surface corrosion controlled by the cracks was widespread.
【作者單位】： 中國地質(zhì)大學(北京)能源學院;中國地質(zhì)大學(北京)海相儲層演化與油氣富集機理教育部重點實驗室;中國石油遼河油田分公司勘探開發(fā)研究院;
【基金】：國家自然科學基金項目(41102087) 國家重點基礎(chǔ)研究發(fā)展計劃(973計劃)項目(2012CB214802)
【分類號】：P534.42;P618.13
【正文快照】： 以往對于區(qū)域性不整合及其控儲作用的研究,指導了目前塔里木盆地海相碳酸鹽巖儲層的油氣勘探[1-2],這一類區(qū)域性不整合往往對應一級層序和二級層序,與長周期構(gòu)造控制的海平面變化有關(guān)。隨著勘探的深入,中-下奧陶統(tǒng)鷹山組內(nèi)幕儲層的成因逐漸成為關(guān)注的重點。然而,在塔里木盆地,

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