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- The controlled source electromagnetic (CSEM) method, also called sea bed logging, is a mostly offshore geophysical technique, employing electromagnetic remote-sensing technology to map the electric resistivity distribution of the subsurface. The electrical resistivity helps to discriminate between different types of rocks. CSEM is mostly used to indicate the presence and extent of hydrocarbon below the seabed. The CSEM survey uses a dipole source that is towed just above the seafloor to transmit a time-varying electromagnetic field into the earth. This field is modified by the presence of subsurface resistive layers and these changes are detected and logged by an array of receivers placed on the seabed. Because hydrocarbon-bearing formations are highly resistive compared with surrounding formations, a CSEM survey can indicate the presence of oil and gas in offshore situations. (en)
- 人工電流源電磁探査法（じんこうでんりゅうげんでんじたんさほう、Controlled-source electromagnetic method、以下CSEM法と略す）とは、物理探査手法の一つであり、人工的な電流源を用いて電流送信を行い、その応答として観測される電場または磁場、もしくはその両方から地下構造を推定する電磁探査手法の一種である。 (ja)
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- 人工電流源電磁探査法（じんこうでんりゅうげんでんじたんさほう、Controlled-source electromagnetic method、以下CSEM法と略す）とは、物理探査手法の一つであり、人工的な電流源を用いて電流送信を行い、その応答として観測される電場または磁場、もしくはその両方から地下構造を推定する電磁探査手法の一種である。 (ja)
- The controlled source electromagnetic (CSEM) method, also called sea bed logging, is a mostly offshore geophysical technique, employing electromagnetic remote-sensing technology to map the electric resistivity distribution of the subsurface. The electrical resistivity helps to discriminate between different types of rocks. CSEM is mostly used to indicate the presence and extent of hydrocarbon below the seabed. (en)
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- Controlled source electro-magnetic (en)
- 人工電流源電磁探査法 (ja)
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