重震联合研究在磅逊盆地中的应用

THE APPLICATION OF SEISMIC AND GRAVITY INTEGRATED METHOD TO THE KAMPONG BASIN,CAMBODIA

长期以来,磅逊盆地石油地质勘探研究程度较低,此前未进行过任何油气勘探工作,缺乏地震、钻井资料。为了深入分析评价该区油气勘探潜力,此次研究综合应用新采集2D地震资料和高精度卫星重力数据,根据重力场理论,利用全球重力场模型计算了布格重力异常、重力垂向二阶导数和重力水平总梯度异常。运用地震资料对卫星重力资料进行约束反演、综合解释,分析了磅逊盆地断裂系统,划分了构造单元。

The Cambodian Kampong basin located in the east Gulf of Thailand,which is a Meso-Paleozoic basin and located in the east of the paleo-Thetis suture zone. The basin that recognized as a intraplate-craton basin until the Permian,became the intracontinental rift basin after the late Triassic,as the tectonic movement. At present,the exploration degree in this basin is very low. The hydrocarbon research doesn't carry out before,thus seismic data and well log data are lack. In order to analyze and evaluate the hydrocarbons potential,we integrated the seismic and high accuracy satellite gravity data( sample density: 0. 02° × 0. 02°),to calculate Bouguer gravity anomaly,the gravity vertical second-order derivative and the gravity level total gradient anomaly,According to the gravity field theory and the global gravitational field model( EGM96). Finally,Based on seismic constrained gravity inversion and interpreted integration,the research forecasts the basement depth,analyzes the fault system and divide the tectonic unit,finally indicated the direction for the next step exploration research.