Magnetic Susceptibility Analysis of Soil Affected by Hydrocarbon in Wonocolo Traditional Oil Field, Indonesia

Southeast Asian Conference on Geophysics

Ulfah, Melianna^1 ; Wijatmoko, Bambang^1 ; Fitriani, Dini^1

Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jl. Raya Bandung - Sumedang KM. 21, Jatinangor

45363, Indonesia^1

关键词: Fossil fuel combustion;    Hydrocarbon content;    Hydrocarbon exploration;    Magnetic susceptibility measurements;    Petroleum hydrocarbons;    Positive correlations;    Soil magnetic susceptibility;    Susceptibility analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/62/1/012002/pdf
DOI  :  10.1088/1755-1315/62/1/012002

来源: IOP

【 摘 要 】

Magnetic susceptibility of soil affected by hydrocarbon was studied through cored soil samples in two zones (Zone One and Zone Two) of an oil field in Wonocolo Village, East Java. We also collected soil samples as the background from a residential area near the oil field (Zone Three). The Zone One, consisted two cores near producing well; the Zone Two consisted two cores obtained from near a dry hole well and a discontinued well; and the Zone Three consisted two cores to validate the initial soil magnetic susceptibility value in this area. The hydrocarbon content measurement was also done for the upper part of each cores using distillation method to identify the correlation between magnetic susceptibility and hydrocarbon content. From magnetic susceptibility measurement in dual frequency, samples from the Zone One and Zone Two have magnetic susceptibility range from 6,1 × 10-8m3kg-1- 160 × 10-8m3kg-1and 15,7 × 10-8m3kg-1- 417,9 × 10-8m3kg-1, respectively. Whereas background samples from Zone Three have magnetic susceptibility range from 4,8 × 10-8m3kg-1to 81,1 × 10-8m3kg-1. We found low χfd(%) in samples with high magnetic susceptibility values, shown that there was no indication of superparamagnetic minerals in the samples. The hydrocarbon content measurement shows the value range of 8% - 14% only exists in the upper part of all cores in Zone One and one core in Zone Two. From this analysis, we assume that other than the volume of the hydrocarbon content in soil, the period of petroleum hydrocarbon deposition in soil and the fossil fuel combustion generated in the study site could differently increase the soil magnetic susceptibility value in this area. Positive correlation between the two parameters hopefully could contribute to develop environmental magnetic methods for detecting oil spills in soil, especially to remediate former hydrocarbon exploration and production area.