發(fā)布時(shí)間：2018-05-26 11:47

  本文選題：逆時(shí)偏移 + 山地資料　； 參考：《中國(guó)地質(zhì)大學(xué)(北京)》2017年碩士論文

【摘要】：針對(duì)復(fù)雜地表地震勘探的成像問(wèn)題,對(duì)現(xiàn)有地震成像方法進(jìn)行了總結(jié),系統(tǒng)的梳理了目前工業(yè)界疊前深度偏移技術(shù)的發(fā)展現(xiàn)狀以及目前處于應(yīng)用熱點(diǎn)的逆時(shí)偏移的基本理論,并在實(shí)際數(shù)據(jù)中成功應(yīng)用了基于真地表成像方法的逆時(shí)偏移計(jì)算,并總結(jié)了一套應(yīng)用真地表成像方法的地震資料處理流程�？偨Y(jié)下來(lái),本文的成果表現(xiàn)為以下幾個(gè)方面:1、本文系統(tǒng)的梳理了目前工業(yè)界常用的深度偏移成像方法,并針對(duì)逆時(shí)偏移的基本理論進(jìn)行了介紹,通過(guò)模型驗(yàn)證與其他幾種主要方法進(jìn)行了對(duì)比;2、本文介紹了真地表成像方法的基本原理,驗(yàn)證了其在逆時(shí)偏移計(jì)算中的實(shí)現(xiàn)過(guò)程。該計(jì)算方法可以復(fù)雜地表情況下的成像精度,同時(shí)保留了近地表的有用信息。本文通過(guò)模型實(shí)驗(yàn)證明了該方法的有效性,并對(duì)速度模型可能產(chǎn)生的影響也做了深入的探討;3、本文選擇了一塊我國(guó)西南地區(qū)的山地實(shí)際資料,在逆時(shí)偏移過(guò)程中應(yīng)用了真地表成像方法。通過(guò)對(duì)處理技術(shù)的探討以及速度建模過(guò)程的研究,總結(jié)了一套通過(guò)真地表成像技術(shù)提高山地資料成像精度的處理流程,一方面保留了近地表信息,另一方面也提高了靜校正的誤差問(wèn)題,在實(shí)際資料中也取得了良好的處理效果。綜上所述,本文在實(shí)際資料的逆時(shí)偏移過(guò)程中,成功應(yīng)用了真地表成像方法,為復(fù)雜地表地震勘探提供了新的思路。
[Abstract]:Aiming at the imaging problem of complex surface seismic exploration, this paper summarizes the existing seismic imaging methods, systematically combs the development status of prestack depth migration technology in industry and the basic theory of inverse time migration, which is currently in the hot spot of application. The inverse time migration calculation based on the true surface imaging method is successfully applied in the actual data, and a set of seismic data processing flow using the true surface imaging method is summarized. To sum up, the achievements of this paper are as follows: 1. This paper systematically combs the depth migration imaging methods commonly used in industry, and introduces the basic theory of inverse time migration. By comparing the model verification with other main methods, this paper introduces the basic principle of the true surface imaging method, and verifies its implementation process in inverse time migration calculation. This method can obtain the imaging accuracy of complex surface conditions and retain the useful information near the surface. In this paper, the validity of the method is proved by the model experiment, and the possible influence of the velocity model is also discussed in depth. In this paper, a practical data of mountainous area in southwest China is selected. The true surface imaging method is applied in inverse time migration. Through the discussion of processing technology and the research of velocity modeling process, a set of processing flow is summarized to improve the imaging accuracy of mountain data through true surface imaging technology. On the one hand, the near-surface information is retained. On the other hand, the error problem of static correction is improved, and good processing effect is obtained in practical data. To sum up, in the process of inverse time migration of the actual data, the true surface imaging method is successfully applied in this paper, which provides a new way of thinking for seismic exploration of complex surface.
【學(xué)位授予單位】：中國(guó)地質(zhì)大學(xué)(北京)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：P631.4

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本文編號(hào)：1937125