發(fā)布時間：2018-04-16 03:28

  本文選題：達爾其地區(qū) + 騰格爾組　； 參考：《中國石油大學(xué)(華東)》2015年碩士論文

【摘要】：地震體中含有很多的地質(zhì)信息,如何更好的開發(fā)利用,一直是一個熱點與難點。本次論文主要通過工區(qū)的測錄井資料,研究工區(qū)沉積微相,在劃分單一微相的基礎(chǔ)上,對同一沉積時期內(nèi)沉積微相組合進行研究,并通過研究達爾其工區(qū)的地震反射特征,找出沉積微相組合與地震反射特征的對應(yīng)關(guān)系。達爾其地區(qū)位于白音查干凹陷南部斜坡北端,主要發(fā)育有辮狀河三角洲沉積相,微相為河口壩、河道間、席狀砂及水下辮狀河道。對于工區(qū)的地震反射特征研究發(fā)現(xiàn),工區(qū)緩坡帶發(fā)育的濱淺湖相具有中強振幅、中等連續(xù)特征,頻率受深度影響會有變化。當(dāng)水體變深時,從濱淺湖相轉(zhuǎn)向半深湖一深湖相,表現(xiàn)出振幅增強、頻率降低且連續(xù)性增高的趨勢。河道相表現(xiàn)為中振幅、低連續(xù)特征,反映砂體側(cè)向分布局限。辮狀河三角洲前緣相對應(yīng)高頻、中強振幅地震相。根據(jù)測錄井資料,對工區(qū)的地質(zhì)模型主要分了六種,在對D24區(qū)塊的具體研究中發(fā)現(xiàn),沉積微相組合模式不同,其振幅值大小也不同,其中河口壩+河道間組合及河口壩+河道間+席狀砂組合模式的振幅值較大,振幅值主要取決于砂泥互層發(fā)育情況。工區(qū)頻譜類型主要發(fā)育單峰、雙峰及多峰。單峰的地震相較為單一,在上下兩條主要的延伸較長的同向軸之間沒有多余的振幅較為明顯的同向軸,而雙峰和多峰的在兩條頂界底界同向軸之間還發(fā)育有其它的振幅較明顯的同向軸。振幅值較大時,頻譜圖中會發(fā)育一個明顯的主峰。
[Abstract]:Seismic body contains a lot of geological information, how to better development and utilization, has been a hot and difficult point.In this paper, the sedimentary microfacies in the working area are studied by logging data. On the basis of dividing the single microfacies, the combination of sedimentary microfacies in the same sedimentary period is studied, and the seismic reflection characteristics of the Dalki area are studied.The relationship between sedimentary microfacies combination and seismic reflection characteristics is found out.The Dalki area is located at the northern end of the southern slope of Baiyinchagan sag. There are mainly braided river delta sedimentary facies. The microfacies are estuarine dam, interchannel, sheet sand and underwater braided channel.It is found that the shallow lacustrine facies developed in the gentle slope zone of the working area have moderate amplitude, medium continuity, and the frequency will be affected by depth.When the water becomes deeper, it turns from the shallow littoral lake to the semi-deep lake to the deep lake, which shows the trend of increasing amplitude, decreasing frequency and increasing continuity.The channel facies is characterized by medium amplitude and low continuity, reflecting the limitation of lateral distribution of sand body.The braided river delta front phase corresponds to high frequency and medium strong amplitude seismic facies.According to the logging data, the geological models of the working area are mainly divided into six types. In the specific study of block D24, it is found that the amplitude of the sedimentary microfacies assemblage model is different,The amplitudes of the interchannel assemblage of estuarine dam and the sheet sand assemblage of estuarine dam are relatively large, and the amplitude mainly depends on the development of sand and mud interbed.Single peak, double peak and multi-peak are the main spectrum types in the working area.The single peak seismic phase is relatively single, and there is no obvious coaxial amplitude between the two main extending coaxial lines.However, there are other coaxial amplitudes between the two top boundary and the bottom boundary of the double peak and the multi-peak.When the amplitude value is larger, there will be an obvious main peak in the spectrum map.
【學(xué)位授予單位】：中國石油大學(xué)(華東)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P618.13;P631.4

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本文編號：1757111