华南燕山、印支与加里东构造面及其对油气影响的地球物理研究

Yanshanian,Indosinian and Caledonian Structure Planes and Geophysical Research on Their Impact to Oil-Gas Reservoir in South China

基于华南地区1∶100万布格重力异常资料,采用小波多尺度分解和功率谱分析方法提取了燕山、印支与加里东构造面的重力场,进行了帕克法重力界面快速反演,并以MT、地震资料为约束,获得了3个构造面的深度,分析了3个构造面的特征,以及对油气保存的控制。研究表明,华南地区基底构造相对稳定,存在2-3个构造面（沉积体）叠加,后期构造运动和岩浆活动相对较弱,油气保存的有利区依次为四川盆地、江汉盆地、下扬子盆地和南盘江盆地。

It is very necessary to use geophysical methods to study the characteristics of Yanshanian, Indosinian and Caledonian structure planes. According to South China 1：1 000 000 bouguer gravity anomalies, the multi-scale wavelet decomposition and power spectral analysis methods are used to pick up the gravity fields of the Yanshanian, Indosinian and Caledonian structure planes, then the method of Parker inversion with the constrained MT and seismic data is applied to gain the depths. Finally, analysis is made on the characteristics and oil-gas reservoir preservation controlling role of the three structure planes. It is found that the basement structure is relatively stable, with 2-3 structure planes （sedimentary bodies） stacking, while the latter period of magmatic and tectonic movement is relatively weak. This result indicates that there are favorable preservation areas for oil-gas, including successively Sichuan Basin, Jianghan Basin, and the Yangtze and Nanpan River Basin.