Oil and gas basin analysis based on airborne gravity and magnetic data
Liu Yan-Xu, Li Wen-Yong,*, Ma Guo-Qing, Cao An-Qi, Gao Shan, Wang Ning,
Lu Wen-Fen, Wang Li-Jie, Yang Cheng
1. China Aero Geophysical Survey and Remote Sensing Center for Nature Resources, 31 Xueyuan Road, Haidian District,Beijing 100083, China;
2. College of Geo-Exploration Science and Technology, Jilin University, Changchun 130021, China;
3. Oil and Gas Engineering Research Institute of Jilin Oilfi eld Company, Jilin Jilin138000, China;
Abstract In this study, we discuss the methods and results for the tectonolayer of a hydrocarbon basin using airborne gravity and magnetic data in the Qijia–Gulong area of the Songliao Basin. Using the latest airborne gravity and magnetic data combined with seismic and drilling data, we determined the density and magnetic measurement data of strata (rocks) in the study area. Next, density and structural stratifications were conducted. The structural sections of the strata–structure–magmatic rocks in the shallow, middle, and deep strata of the basin were determined, and a three-dimensional framework with multiple levels of the basin was constructed. Combining qualitative analysis and quantitative calculation, we explained the depths of the bottom of the Cenozoic layer, the bottom of the Upper Cretaceous layer,the bottom of the Mesozoic layer, and the top of the magnetic basement. We also determined the thicknesses of the Cenozoic layer, the Upper Cretaceous layer, the Upper Jurassic–Lower Cretaceous layer, and the Upper Paleozoic layer. These provide important achievements for the new petroliferous strata survey of regional Upper Paleozoic and Upper Jurassic–Lower Cretaceous strata. At the same time, it provides a new exploration method for studying are as with magmatic rocks and unclear deep seismic reflections. The results show that the new Upper Paleozoic strata (with a thickness of 0–9200 m) are mainly distributed in the central and eastern regions but absent in the western region. This yields significant differences in different regions of the study area. The thickness and depth of the Upper Jurassic–lower Cretaceous layer were different between the eastern and western regions; thicker and deeper in the middle eastern region but thinner and shallower in the western region.
Fund: The research was funded by National Key Research and Development Program of China (no.2023YFB3907703);Project of Aviation Gravity and Magnetism Comprehensive Investigation in Xinjiang Awulale IronResource Base (no. DD20240205003)
Corresponding Authors: Li Wen-Yong (1352021692@qq.com).
E-mail: 1352021692@qq.com
About author: Liu Yan-Xu received her Ph.D. in Solid Geophysics from Jilin University in 2009. She is currently a senior engineer in China Aero Geophysical Survey and Remote Sensing Center for Nature Resources, mainly engaged in aerogeophysical work in oil and gas exploration. E-mail:7773531@qq.com
Cite this article:
. Oil and gas basin analysis based on airborne gravity and magnetic data[J]. APPLIED GEOPHYSICS, 2025, 22(3): 571-587.
2025, Vol. 22 
