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柬埔寨磅逊盆地位于泰国湾东部,构造上处于古特提斯缝合带东侧,属于中-古生代盆地,早期(石炭-二叠系)为板内克拉通盆地,晚期(晚三叠纪)由于北部抬升逐渐转换为板块边缘,受构造运动的多期改造变成陆内裂谷盆地.长期以来,磅逊盆地石油地质勘探研究程度很低.没有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的2D地震资料和高精度卫星重力数据(样点分布密度:0.02°×0.02°),根据重力场理论,利用全球重力场模型(EGM96)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.利用地震资料对卫星重力资料进行约束反演、综合解释,预测了盆地基底埋深,分析了构造特征,划分了构造单元,为下一步勘探研究指明了方向.
The Cambodian Bashan basin is located in the east of Gulf of Thailand and is located on the eastern side of the ancient Tethys suture and belongs to the Meso-Paleozoic basin. The early (Carboniferous-Permian) intraplate cratonic basin, late (Late Triassic) Uplift in the north gradually transforms to the plate margin and is transformed into an intracontinental rift basin due to the multi-period alteration of tectonic movement. For a long time, the research on petroleum geology in the Bashan Basin was very low, without any oil and gas exploration, lack of earthquakes and drilling data In order to deeply analyze and evaluate the potential of oil and gas exploration in this area, this study comprehensively uses newly acquired 2D seismic data and high precision satellite gravity data (sample distribution density: 0.02 ° × 0.02 °) according to the gravitational field theory and the global gravity field The model (EGM96) calculates the Bouguer gravity anomaly, the second gravity vertical gravity gradient and the gravity gradient anomaly. Using the seismic data to retrieve the satellite gravity data constrainedly, comprehensively interprets and predicts the basal depth of the basin and analyzes the tectonic features , Divided the tectonic units, pointed out the direction for the next exploration and study.