海洋可控源電磁勘探中雙對稱發(fā)射波形的優(yōu)化
發(fā)布時間:2018-11-06 19:29
【摘要】:海洋可控源電磁勘探(Marine Controlled-Source Electromagnetic,MCSEM)是一門新興的海洋油氣勘探技術.在MCSEM測量中最常采用的發(fā)射信號就是方波信號,但方波信號各諧波成分的能量隨著奇次諧波次數n的增加嚴重衰減,這可能使得很多諧波成分在有效傳輸距離內檢測不到.為了有效提高MCSEM信號的信噪比,學者D.Myer對發(fā)射波形進行了優(yōu)化,提出了一種雙對稱波形.但D.Myer針對雙對稱波形只是進行了初步的理論分析并沒有進行實驗驗證,本文對雙對稱波形的實現提出了合理的實驗方案,并從中選取了最優(yōu)波形.
[Abstract]:Ocean controllable source electromagnetic exploration (Marine Controlled-Source Electromagnetic,MCSEM) is a new offshore oil and gas exploration technology. The most commonly used transmission signal in MCSEM measurement is square wave signal. However, the energy of harmonic components of square wave signal attenuates seriously with the increase of odd harmonic number n, which may make many harmonic components undetectable within effective transmission distance. In order to improve the signal-to-noise ratio (SNR) of MCSEM signal effectively, the transmitted waveform is optimized by D.Myer, and a double symmetric waveform is proposed. But D.Myer has only carried on the preliminary theoretical analysis to the double symmetry waveform and has not carried on the experimental verification, this article proposed the reasonable experiment plan to the realization of the double symmetry waveform, and selected the best waveform from it.
【作者單位】: 中國石油大學(華東)信息與控制工程學院;浙江省紹興市上虞區(qū)產品質量監(jiān)督檢驗所;
【基金】:中國石油集團東方地球物理勘探有限責任公司委托項目“海洋可控源電磁勘探中MT噪聲的降噪方法研究”資助
【分類號】:P631.325;P744.4
[Abstract]:Ocean controllable source electromagnetic exploration (Marine Controlled-Source Electromagnetic,MCSEM) is a new offshore oil and gas exploration technology. The most commonly used transmission signal in MCSEM measurement is square wave signal. However, the energy of harmonic components of square wave signal attenuates seriously with the increase of odd harmonic number n, which may make many harmonic components undetectable within effective transmission distance. In order to improve the signal-to-noise ratio (SNR) of MCSEM signal effectively, the transmitted waveform is optimized by D.Myer, and a double symmetric waveform is proposed. But D.Myer has only carried on the preliminary theoretical analysis to the double symmetry waveform and has not carried on the experimental verification, this article proposed the reasonable experiment plan to the realization of the double symmetry waveform, and selected the best waveform from it.
【作者單位】: 中國石油大學(華東)信息與控制工程學院;浙江省紹興市上虞區(qū)產品質量監(jiān)督檢驗所;
【基金】:中國石油集團東方地球物理勘探有限責任公司委托項目“海洋可控源電磁勘探中MT噪聲的降噪方法研究”資助
【分類號】:P631.325;P744.4
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