發(fā)布時(shí)間：2019-06-05 14:29

【摘要】：速度分析在地震勘探資料處理中扮演著非常重要的作用。隨著地震勘探目標(biāo)體深度的加深,人們對(duì)地震勘探的精度的要求已越來(lái)越高。又由于地下介質(zhì)常表現(xiàn)為各向異性,因此,建立在各向同性介質(zhì)前提下的速度分析已經(jīng)不能滿(mǎn)足人們對(duì)高精度地震勘探的要求。深入研究各向異性介質(zhì)有助于解決中長(zhǎng)排列動(dòng)校正問(wèn)題,它對(duì)油氣勘探開(kāi)發(fā)中的深層目的層勘探、精確速度分析以及時(shí)深轉(zhuǎn)換的精確度等意義重大。所以當(dāng)進(jìn)行多波地震勘探時(shí),我們需要求得各向異性介質(zhì)的時(shí)距曲線擬合公式,同時(shí)要分析地層參數(shù)與速度的關(guān)系,充分利用多種信息進(jìn)行處理。本文在深入學(xué)習(xí)和了解各向異性理論以及其中的各向異性速度分析理論后,總結(jié)前人的研究成果對(duì)各向異性理論進(jìn)行簡(jiǎn)要闡述,介紹在各向異性介質(zhì)中地震波正常時(shí)差計(jì)算公式。并在前人相關(guān)文獻(xiàn)的基礎(chǔ)上針對(duì)VTI介質(zhì),得出在VTI介質(zhì)下的縱波及轉(zhuǎn)換波時(shí)距曲線推導(dǎo)公式,并分析其中各向異性參數(shù)與速度在時(shí)距方程中的關(guān)系。同時(shí)對(duì)各向同性情況下的時(shí)距曲線和速度譜作對(duì)比。此外,本文在國(guó)內(nèi)外速度分析研究進(jìn)展的基礎(chǔ)上,參考國(guó)內(nèi)外學(xué)者在速度分析方法中的研究成果,針對(duì)前人方法的所存在的問(wèn)題提出了改進(jìn)的相位相關(guān)速度分析方法,并比較改進(jìn)后和改進(jìn)前方法的實(shí)際效果。隨著在生產(chǎn)中對(duì)地震數(shù)據(jù)精度的要求變高,使用分辨率更高的速度分析尤為重要,但是常規(guī)速度分析方法由于受到時(shí)窗長(zhǎng)度的影響,以及算法本身存在的缺點(diǎn),導(dǎo)致處理得到的資料精度不夠,因此對(duì)新的速度分析方法的需求逐漸增加。而基于相位相關(guān)統(tǒng)計(jì)的速度分析方法則避免了這個(gè)影響,它分析的速度更加收斂。本文通過(guò)程序算法實(shí)現(xiàn)該方法的應(yīng)用效果,總結(jié)并驗(yàn)證前人在該方法上分析與應(yīng)用,證明該方法的可行性。同時(shí),分別在各向同性介質(zhì)和各向異性介質(zhì)情況下,將相位相關(guān)統(tǒng)計(jì)速度分析方法與常規(guī)方法進(jìn)行對(duì)比,得出該方法的優(yōu)缺點(diǎn)。本文立足多波各向異性,結(jié)合生產(chǎn)實(shí)習(xí)時(shí)學(xué)到的理論與技術(shù),通過(guò)實(shí)際地震資料處理來(lái)展示多波速度建模軟件在實(shí)際中的應(yīng)用。
[Abstract]:Velocity analysis plays a very important role in seismic exploration data processing. With the deepening of the depth of seismic exploration targets, the requirements for the accuracy of seismic exploration have become higher and higher. Because the underground medium is often anisotropy, the velocity analysis based on isotropic medium can no longer meet the requirements of high precision seismic exploration. The deep study of anisotropy medium is helpful to solve the problem of medium and long arrangement dynamic correction, which is of great significance to the exploration of deep target layer in oil and gas exploration and development, the accuracy of accurate velocity analysis in time and deep conversion, and so on. Therefore, when carrying out multi-wave seismic exploration, we need to obtain the fitting formula of time-distance curve of anisotropy medium, and analyze the relationship between formation parameters and velocity, and make full use of a variety of information to deal with it. In this paper, after deeply studying and understanding the theory of anisotropy and the theory of anisotropy velocity analysis, this paper summarizes the previous research results and briefly expounds the theory of anisotropy. The formula for calculating the normal time difference of seismic waves in anisotropic media is introduced. On the basis of previous literature, the formulas of P-wave and converted wave time-distance curve in VTI medium are obtained, and the relationship between anisotropy parameters and velocity in time-distance equation is analyzed. At the same time, the time distance curve and velocity spectrum in the case of isotropism are compared. In addition, on the basis of the research progress of velocity analysis at home and abroad, referring to the research results of domestic and foreign scholars in velocity analysis methods, an improved phase correlation velocity analysis method is proposed to solve the problems existing in the previous methods. The practical effects of the improved method and the improved method are compared. As the accuracy of seismic data becomes higher in production, it is particularly important to use speed analysis with higher resolution, but the conventional speed analysis method is affected by the length of time window and the shortcomings of the algorithm itself. As a result, the accuracy of the processed data is not enough, so the demand for new speed analysis methods is gradually increasing. The velocity analysis method based on phase correlation statistics avoids this influence, and the speed of its analysis is more convergent. In this paper, the application effect of the method is realized by the program algorithm, and the previous analysis and application of the method are summarized and verified, and the feasibility of the method is proved. At the same time, the statistical velocity analysis method of phase correlation is compared with the conventional method in the case of isotropic medium and anisotropic medium, and the advantages and disadvantages of this method are obtained. Based on the multi-wave anisotropy and the theory and technology learned in production practice, this paper shows the application of multi-wave velocity modeling software in practice through practical seismic data processing.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：P631.4

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 李軼彬;王德利;徐世博;;選擇相關(guān)速度分析方法在VTI介質(zhì)中的應(yīng)用[J];世界地質(zhì);2013年03期

2 雷新民;潘文勇;雷新華;張光學(xué);張新;張雷;;相位相關(guān)統(tǒng)計(jì)速度分析方法的改進(jìn)[J];石油地球物理勘探;2011年03期

3 王靜;張軍華;單聯(lián)瑜;徐輝;于海鋮;;相位相關(guān)速度分析方法研究及效果比較[J];物探化探計(jì)算技術(shù);2010年02期

4 馬建波;李紹康;銀燕惠;凌彩香;李傳強(qiáng);;東濮凹陷高密度各向異性自動(dòng)速度分析[J];中國(guó)石油勘探;2009年06期

5 顧小弟;劉江平;楊明;;轉(zhuǎn)換點(diǎn)坐標(biāo)的模擬計(jì)算研究[J];工程地球物理學(xué)報(bào);2007年03期

6 畢麗飛,李振春,王延光,石建新,夏吉莊,王慧,喬玉雷;轉(zhuǎn)換波處理中共轉(zhuǎn)換點(diǎn)的定位[J];勘探地球物理進(jìn)展;2005年05期

7 何兵壽,張會(huì)星;共轉(zhuǎn)換點(diǎn)速度分析[J];石油地球物理勘探;2005年05期

8 劉洋,魏修成;轉(zhuǎn)換波三參數(shù)速度分析及動(dòng)校正方法[J];石油地球物理勘探;2005年05期

9 苑春方;彭蘇萍;楊良梁;;水平界面上P-SV轉(zhuǎn)換波轉(zhuǎn)換點(diǎn)的精確解[J];地球物理學(xué)報(bào);2005年05期

10 羅省賢,李錄明,陳春繼;VTI介質(zhì)多波速度與各向異性系數(shù)求取及應(yīng)用[J];物探化探計(jì)算技術(shù);2005年03期

相關(guān)碩士學(xué)位論文 前3條

1 胥良君;各向異性介質(zhì)多波速度分析及可視化軟件實(shí)現(xiàn)[D];成都理工大學(xué);2008年

2 韓世春;各向異性介質(zhì)轉(zhuǎn)換波速度分析方法研究及應(yīng)用[D];中國(guó)石油大學(xué);2007年

3 王立明;提高多波速度分析精度的研究[D];長(zhǎng)安大學(xué);2005年

，

本文編號(hào)：2493596