Application of integrative geophysical methods to predicting sedimentary facies of marine residual basins in middle Guangxi province, China

作者：Li Shu Ling^*; Meng Xiao Hong; Fu Li Xin; Yao Chang Li; Guo Liang Hui; Chen Zhao Xi; Shi Lei

来源：Chinese Journal of Geophysics, 2009, 52(10): 2619-2626.

DOI：10.3969/j.issn.0001-5733.2009.10.022

• Residual basin
• Sedimentary facies
• Geophysical methods
• Potential field anomaly forward stripping
• Forward/Inverse fitting technique
• Lithologic trap
• Bioherm

The sedimentary facies study is one of the key procedures in exploration Of Subtle reservoirs in basins, of which a prerequisite is effective identification of its structural, lithologic or lithofacies differences through integrated usage of geophysical methods. Based on geophysical data, including gravity, aeromagnetic and seismic data, this paper describes the density distribution characteristics of marine strata in middle Guangxi province, south China, and predicts the regularities of lithofacies and sedimentary facies changes in terms of potential field forward stripping and profile forward/inverse fitting. It is revealed that transversal lithologic and lithofacies changes exist in the marine strata of mid- and lower-Devonian series of the area. The platform zones in northwest and southeast of the area have high gravity anomalies and high fitting rock density. The "X"-shaped plat form-marginal facies zone in the middle is characterized by irregular gravity anomalies and a large variation range of fitted rock density. And the platform-trough facies zone in the east exhibits low gravity anomalies as well as low fitted rock density. Predicting sedimentary facies through integrative geophysical methods offers a new approach for exploration of lithologic trap reservoirs and bioherm reservoirs in basins. This method has been preliminarily proved, and needs further improvements and applications.

• 出版日期2009-10
• 单位中国地质大学（北京）