本文選題：電磁波測井　切入點(diǎn)：模式匹配法　出處：《東北石油大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：本文對電磁波測井響應(yīng)進(jìn)行了快速精確的模擬。從麥克斯韋方程的電動勢求解入手,利用模式匹配法進(jìn)行了快速正演計(jì)算,然后,通過計(jì)算多種模型,包括成系列的源距,層厚及圍巖,多種頻率的縱向分辨率等條件下的地質(zhì)模型,得到了一系列有關(guān)2MHz電磁波測井響應(yīng)計(jì)算的成果圖版,考查了2MHz電磁波測井的多種探測特性。最后,將所作的算法和軟件與實(shí)際的測井資料進(jìn)行對比驗(yàn)證,檢驗(yàn)效果良好。說明本文所作的研究,是正確的,并且研究方法從理論到最后對實(shí)際生產(chǎn)應(yīng)用方面均有創(chuàng)新,方法具有普適性,具有廣泛應(yīng)用的價(jià)值。得到的主要研究結(jié)論:首先,使用了一種相對于有限元法和有限差分更加快速高效的方法,半解析、半有限元的方法(模式匹配法)來解決復(fù)雜的地層條件下的井眼電磁場分布問題。得到了復(fù)雜地層中的電磁波測井響應(yīng)計(jì)算公式。其次,將得到的響應(yīng)計(jì)算公式在計(jì)算機(jī)上用Fortran語言編程實(shí)現(xiàn)。針對不同的考察目的設(shè)計(jì)的地層模型,進(jìn)行模擬計(jì)算,得到了系統(tǒng)的2MHz電磁波測井響應(yīng)計(jì)算圖版。這一系列的圖版說明了在2MHz頻率條件下,電磁波測井的探測特性,包括探測范圍,探測深度以及對地層參數(shù)條件的敏感性等。最后,將算法和軟件應(yīng)用到實(shí)際的測井?dāng)?shù)據(jù)資料中,進(jìn)一步對之前得到的響應(yīng)計(jì)算結(jié)果進(jìn)行驗(yàn)證。驗(yàn)證結(jié)果表明,本文實(shí)現(xiàn)的算法和軟件,可以較好的判別水淹層和對薄層進(jìn)行識別。說明了本文使用的模式匹配法這種較新穎的方法是成功的,可以在實(shí)際生產(chǎn)中進(jìn)行推廣。
[Abstract]:In this paper, the response of electromagnetic wave logging is simulated quickly and accurately. Starting from the solution of Maxwell equation by electromotive force, the fast forward calculation is carried out by using the pattern matching method. Then, by calculating various models, including the source distance of series, The geological models under the conditions of layer thickness and surrounding rock, longitudinal resolution of various frequencies, and so on, are obtained. A series of results of 2MHz electromagnetic wave logging response calculation are obtained, and various detection characteristics of 2MHz electromagnetic wave logging are examined. By comparing the algorithm and software with the actual logging data, the results are good. The results show that the research done in this paper is correct, and the research method has been innovated in the practical production application from the theory to the end. The main conclusions are as follows: firstly, a more rapid and efficient method than finite element method and finite difference method is used. The semi-finite element method (pattern matching method) is used to solve the problem of hole electromagnetic field distribution under complex formation conditions. The formula for calculating the response of electromagnetic wave logging in complex formation is obtained. The response calculation formula is programmed in Fortran language on the computer. The formation model designed for different inspection purposes is simulated and calculated. This series of charts show the detection characteristics of electromagnetic wave logging under 2MHz frequency, including detection range, depth and sensitivity to formation parameters. The algorithm and software are applied to the actual well logging data, and the response calculation results obtained before are further verified. The verification results show that the algorithm and software are implemented in this paper. The pattern matching method used in this paper is successful and can be popularized in actual production.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P631.811

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本文編號：1646537