Evaluation of Petroleum Potential of the Neogene-Paleogene Deposits in Southeast Asia by Electromagnetic Techniques

Electromagnetic surveys had objective of identifying the relationship of geoelectric parameters of the sedimentary cover (resistivity and IP) with the distribution of hydrocarbon deposits. For this two techniques were used: Transient Electromagnetic Soundings in Time Domain (TEM) and Induced Polarization Electromagnetic method (EM-IP). TEM allows to accurately define the resistivity of rocks. Derived from this data zones with potential reservoirs were qualified with Induced Polarization (IP) anomalies, probably related to presence of hydrocarbon system.

It was found from TEM investigations that sediments of surveyed area are highly conductive. Total conductivity exceeds 2000 S. Nevertheless EM technique has shown sensitivity to geoelectric parameters changes to the depth up to 4 km. Results of EM project are various geoelectrical maps showing the distribution of geoelectric parameters and sections imaging geological structures within the survey area.