CST computer output (Magnitude of E-field vs offset)

Published: 09-04-2021| Version 2 | DOI: 10.17632/bvwfy54j2d.2
Muhammad Naeim Mohd Aris,
Hanita Daud,
Sarat Chandra Dass,
Khairul Arifin Mohd Noh


This is synthetic marine controlled-source electromagnetic (CSEM) data set which was generated using Computer Simulation Technology (CST) software. This data set is magnitude of electric field (E-field), V/m, versus source-receiver separation distance (offset), m, at various depths of hydrocarbon (250m - 2750m with an increment of 250m each). The magnitude of E-field is inversely proportional to the offset and hydrocarbon depth. If the offset is further apart and depth of hydrocarbon is deeper from the seabed, the strength of E-field decreases. The data set of magnitude of E-field varies in every depth of hydrocarbon. For this data set, multiple transmission frequencies were used during the data acquisition (0.125, 0.25 and 0.5 Hz). This data set was generated based on the typical synthetic seabed logging (SBL) environment in isotropic medium. This data set was taken for offset from 5000m to 10000m of the SBL model due to symmetrical property. In the data processing, only E-fields from offset of ~7400m to ~9500m were considered, and the offsets were set to start from 0m to 5000m. Thus, this data set is for offsets from ~2400m to ~4500m. The details are elaborated in the section below.


Steps to reproduce

The 3-D canonical synthetic model of typical marine CSEM (SBL model with length: 10000m, width: 10000, height: 5000m) for hydrocarbon exploration was replicated using CST EM Studio package. The SBL model consisted background layers (e.g. air, seawater and sediment) and hydrocarbon layer. The thicknesses of air, seawater and sediment layers were kept at 300m, 1000m and 3500m, respectively. A hydrocarbon layer with a thickness of 200m was embedded in the sediment layer with different depths from the seabed. The depths of hydrocarbon were varied from 250m to 2750m with an increment of 250m each. Every layer had been parameterized with specific properties such as electrical conductivity, thermal conductivity and relative permittivity.