海洋可控源電磁勘探中雙對(duì)稱(chēng)發(fā)射波形的優(yōu)化
發(fā)布時(shí)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(mén)新興的海洋油氣勘探技術(shù).在MCSEM測(cè)量中最常采用的發(fā)射信號(hào)就是方波信號(hào),但方波信號(hào)各諧波成分的能量隨著奇次諧波次數(shù)n的增加嚴(yán)重衰減,這可能使得很多諧波成分在有效傳輸距離內(nèi)檢測(cè)不到.為了有效提高M(jìn)CSEM信號(hào)的信噪比,學(xué)者D.Myer對(duì)發(fā)射波形進(jìn)行了優(yōu)化,提出了一種雙對(duì)稱(chēng)波形.但D.Myer針對(duì)雙對(duì)稱(chēng)波形只是進(jìn)行了初步的理論分析并沒(méi)有進(jìn)行實(shí)驗(yàn)驗(yàn)證,本文對(duì)雙對(duì)稱(chēng)波形的實(shí)現(xiàn)提出了合理的實(shí)驗(yàn)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(guó)石油大學(xué)(華東)信息與控制工程學(xué)院;浙江省紹興市上虞區(qū)產(chǎn)品質(zhì)量監(jiān)督檢驗(yàn)所;
【基金】:中國(guó)石油集團(tuán)東方地球物理勘探有限責(zé)任公司委托項(xiàng)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(lèi)號(hào)】: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(guó)石油大學(xué)(華東)信息與控制工程學(xué)院;浙江省紹興市上虞區(qū)產(chǎn)品質(zhì)量監(jiān)督檢驗(yàn)所;
【基金】:中國(guó)石油集團(tuán)東方地球物理勘探有限責(zé)任公司委托項(xiàng)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(lèi)號(hào)】:P631.325;P744.4
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