本文選題：海洋可控源電磁 + 數(shù)據(jù)處理　； 參考：《成都理工大學(xué)》2015年碩士論文

【摘要】：海洋可控源電磁(MCSEM)勘探技術(shù)是一種通過油氣藏及周邊沉積物的電阻率存在差異化的原理來判定海底是否有油氣儲層,被廣泛應(yīng)用于海洋油氣儲層鉆探前的儲層價值預(yù)測與評估的探測方法。海洋CSEM技術(shù)優(yōu)勢明顯,數(shù)據(jù)采集設(shè)備集成化高。它不僅補充了海洋勘探的不足,提高鉆井勘探的成功率,而且能有效地勘探海底油氣及天然氣水合物儲層。CSEM技術(shù)與地震、測井、地質(zhì)等資料綜合解釋能有效提高薄層電阻率油氣解釋精度,區(qū)分地下的油氣與其他流體,增加勘探的精度和準(zhǔn)確性,提高鉆探成功率。雖然國外海洋電磁發(fā)展迅猛,但國內(nèi)海洋電磁的發(fā)展依然十分緩慢,各項研究任務(wù),包括硬件及高效快速的處理軟件仍十分落后,目前國內(nèi)有關(guān)海洋CSEM勘探技術(shù)實質(zhì)性的研究尚處于起步階段,還沒有出現(xiàn)完善的海洋電磁探測數(shù)據(jù)處理與解釋技術(shù)�；诖吮疚囊袁F(xiàn)有的海洋CSEM電磁法基本原理為基礎(chǔ),依托國家科研項目,通過調(diào)研大量的海洋可控源電磁的文獻資料完成了如下工作,以期為下一步研究提供一些幫助。(1)通過搜集和分析大量海洋MT探測、海洋CSEM探測等相關(guān)的技術(shù)資料,更加深入理解了海洋可控源電磁法(MCSEM)的基本原理,并在本文中詳細介紹了MCSEM的理論基礎(chǔ)。(2)介紹了海洋CSEM探測的發(fā)射裝置并分析了海洋CSEM發(fā)射信號的特征,分析了幾種常用的海洋CSEM發(fā)射波形,尤其對本課題中使用的方波信號進行詳細分析。(3)介紹了海洋CSEM探測的接收裝置,分析了接收信號,主要通過收發(fā)距與接收信號的關(guān)系對接收信號進行了研究。(4)參考了大量國內(nèi)外海洋電磁以及地球物理學(xué)科領(lǐng)域中的優(yōu)秀可視化解釋軟件,找出適合海洋CSEM的可視化解釋方法。本文采用的是振幅隨偏移距曲線(MVO)數(shù)據(jù)解釋方法,本文對該方法作了詳細介紹,通過實驗結(jié)果圖形的繪制,舉例說明了高阻油氣層厚度與MV0最大值的關(guān)系；(5)在前人研究基礎(chǔ)上,本文對海洋CSEM數(shù)據(jù)處理步驟進行了分析和總結(jié),總結(jié)了海洋CSEM數(shù)據(jù)處理的步驟,原始數(shù)據(jù)初始化；方位校正,有兩種方式可以選擇,即橢圓極化分析和旋轉(zhuǎn)電性軸分析；海洋CSEM的噪聲信號的消除；最后合并航行位置數(shù)據(jù)繪制出可視化解釋圖形；(6)本文利用MATLAB軟件和Fortran計算機高級程序語言編寫代碼,完成了數(shù)據(jù)處理、一維正演、一維反演、數(shù)據(jù)解釋功能模塊的開發(fā)工作,并最終將所有模塊集成到本文設(shè)計的軟件解釋系統(tǒng)中。(7)詳細介紹了本文設(shè)計的解釋軟件的使用說明,包括對系統(tǒng)界面中按鈕,復(fù)選框,下拉列表等功能介紹說明,還介紹了參數(shù)的設(shè)置和一些系統(tǒng)默認操作,最后使用本系統(tǒng)軟件進行一系列實驗測試,并將實驗結(jié)果與一些可靠的海洋CSEM電磁探測相關(guān)文獻的結(jié)論相比較,驗證解釋處理結(jié)果的正確性。
[Abstract]:Marine controllable source electromagnetic (MCSEMM) exploration technology is a method to determine whether there is an oil and gas reservoir on the bottom of the sea by differentiating the resistivity of oil and gas reservoir and its surrounding sediment. It is widely used in the prediction and evaluation of reservoir value before offshore oil and gas reservoir drilling. Ocean CSEM technology has obvious advantages and high integration of data acquisition equipment. It not only complements the deficiency of ocean exploration and improves the success rate of drilling exploration, but also can effectively explore subsea oil, gas and gas hydrate reservoir. CSEM technology and seismic logging. Comprehensive interpretation of geological and other data can effectively improve the interpretation accuracy of thin layer resistivity oil and gas, distinguish underground oil and gas from other fluids, increase the accuracy and accuracy of exploration, and improve the success rate of drilling. Despite the rapid development of ocean electromagnetic in foreign countries, the development of marine electromagnetic in China is still very slow, and all kinds of research tasks, including hardware and efficient and fast processing software, are still very backward. At present, the substantial research on marine CSEM exploration technology is still in its infancy, and there is no perfect data processing and interpretation technology for marine electromagnetic exploration. Based on the existing basic principles of ocean CSEM electromagnetic method, and relying on the national scientific research project, this paper has completed the following work by investigating a large number of documents of ocean controllable source electromagnetic. In order to provide some help for the next research.) through collecting and analyzing a large amount of ocean MT detection, ocean CSEM detection and other related technical data, we have a deeper understanding of the basic principle of ocean controllable source electromagnetic method (MCSEMM). In this paper, the theoretical basis of MCSEM is introduced in detail. (2) the launcher of marine CSEM detection is introduced, and the characteristics of marine CSEM emission signal are analyzed, and several commonly used ocean CSEM emission waveforms are analyzed. In particular, the square wave signal used in this subject is analyzed in detail. (3) the receiving device for marine CSEM detection is introduced, and the received signal is analyzed. The received signal is studied by the relation between the receiving and transmitting distance and the received signal. (4) referring to a large number of excellent visual interpretation software in the field of ocean electromagnetic and geophysics at home and abroad, the visual interpretation method suitable for marine CSEM is found out. In this paper, the amplitude versus offset curve (MV0) data interpretation method is used. The method is introduced in detail in this paper. The relationship between the thickness of high resistivity reservoir and the maximum value of MV0 is illustrated by the drawing of the experimental results. This paper analyzes and summarizes the processing steps of marine CSEM data, summarizes the steps of ocean CSEM data processing, initializes the original data, adjusts the azimuth, there are two ways to choose, that is, elliptical polarization analysis and rotating electric axis analysis. In this paper, we use MATLAB software and Fortran computer advanced program language to write code, complete data processing, one-dimensional forward modeling, one-dimensional inversion, Finally, all the modules are integrated into the software interpretation system designed in this paper.) the usage instructions of the interpretation software are introduced in detail, including the buttons in the system interface, check boxes, and so on. Function description such as drop-down list, parameter setting and some system default operation are also introduced. Finally, a series of experimental tests are carried out using the software of this system. The experimental results are compared with the conclusions of some reliable marine CSEM electromagnetic exploration literatures to verify the correctness of the interpretation and processing results.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P631.325

【參考文獻】

相關(guān)期刊論文 前1條

1 劉振鐸 ,石維熊;垂直磁偶極子電磁頻率測深法[J];物探與化探;1980年05期

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本文編號：1930441