本文選題：海洋可控源電磁法 + 天然氣水合物　； 參考：《地球物理學(xué)報(bào)》2016年07期

【摘要】：為了測(cè)試我國(guó)自主設(shè)計(jì)與研發(fā)的海洋可控源電磁儀器性能及其在水合物探測(cè)中的適用性,本文從海洋可控源電磁法基本原理出發(fā),首先根據(jù)試驗(yàn)海域水合物地質(zhì)特征,建立簡(jiǎn)化地電模型開(kāi)展理論研究,確定海洋可控源電磁試驗(yàn)的技術(shù)方案;利用研發(fā)的海洋可控源電磁儀器,在南海天然氣水合物遠(yuǎn)景區(qū)開(kāi)展探測(cè)試驗(yàn),首次獲得了我國(guó)深水海域的海洋可控源電磁數(shù)據(jù).通過(guò)對(duì)采集數(shù)據(jù)進(jìn)行處理與反演,獲得了試驗(yàn)剖面的海底電性結(jié)構(gòu)模型,揭示了4號(hào)測(cè)點(diǎn)下方存在一個(gè)50m厚的高阻層,其電阻率為25Ωm、頂部埋深為181m,為該區(qū)天然氣水合物調(diào)查提供了有價(jià)值的電性參考資料.研究結(jié)果表明,自主研發(fā)的海洋可控源電磁儀器性能達(dá)到了預(yù)期的設(shè)計(jì)指標(biāo),這標(biāo)志著我國(guó)海洋可控源電磁探測(cè)技術(shù)向?qū)嵱没M(jìn)程邁出了重要一步.
[Abstract]:In order to test the performance of marine controllable source electromagnetic instrument designed and developed independently in China and its applicability in hydrate detection, this paper, based on the basic principle of ocean controlled source electromagnetic method, first of all, according to the geological characteristics of hydrate in the experimental sea area. To establish a simplified geoelectric model for theoretical research, to determine the technical scheme for electromagnetic test of marine controllable sources, and to carry out exploration tests in the South China Sea gas hydrate area by using the developed marine controllable source electromagnetic instruments, For the first time, the electromagnetic data of ocean controllable sources in the deep water of China are obtained for the first time. By processing and retrieving the collected data, a submarine electrical structure model of the test section is obtained, and it is revealed that there is a 50m thick high resistivity layer below the test point 4. The resistivity is 25 惟 m and the top buried depth is 181 m, which provides valuable electrical reference for gas hydrate investigation in this area. The results show that the performance of the independently developed marine controllable source electromagnetic instrument has reached the expected design target, which marks an important step towards the practical application of marine controllable source electromagnetic detection technology in China.
【作者單位】： 中國(guó)地質(zhì)大學(xué)(北京)地球物理與信息技術(shù)學(xué)院;地下信息探測(cè)技術(shù)與儀器教育部重點(diǎn)實(shí)驗(yàn)室和地質(zhì)過(guò)程與礦產(chǎn)資源國(guó)家重點(diǎn)實(shí)驗(yàn)室;中國(guó)地質(zhì)調(diào)查局廣州海洋地質(zhì)調(diào)查局;
【基金】：中國(guó)地質(zhì)調(diào)查局項(xiàng)目(201100307) 國(guó)家自然科學(xué)基金重點(diǎn)項(xiàng)目(61531001) 國(guó)家科技部"863"課題(2009AA09A201,2012AA09A201)資助
【分類(lèi)號(hào)】：P631.325

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本文編號(hào)：1822306