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

【摘要】：為了測試我國自主設計與研發(fā)的海洋可控源電磁儀器性能及其在水合物探測中的適用性,本文從海洋可控源電磁法基本原理出發(fā),首先根據(jù)試驗海域水合物地質(zhì)特征,建立簡化地電模型開展理論研究,確定海洋可控源電磁試驗的技術(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景區(qū)開展探測試驗,首次獲得了我國深水海域的海洋可控源電磁數(shù)據(jù).通過對采集數(shù)據(jù)進行處理與反演,獲得了試驗剖面的海底電性結(jié)構(gòu)模型,揭示了4號測點下方存在一個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到了預期的設計指標,這標志著我國海洋可控源電磁探測技術(shù)向?qū)嵱没M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】： 中國地質(zhì)大學(北京)地球物理與信息技術(shù)學院;地下信息探測技術(shù)與儀器教育部重點實驗室和地質(zhì)過程與礦產(chǎn)資源國家重點實驗室;中國地質(zhì)調(diào)查局廣州海洋地質(zhì)調(diào)查局;
【基金】：中國地質(zhì)調(diào)查局項目(201100307) 國家自然科學基金重點項目(61531001) 國家科技部"863"課題(2009AA09A201,2012AA09A201)資助
【分類號】：P631.325

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本文編號：1822306