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利用钻井、测井及地震资料,重建了南沙海域南部第三纪三角洲沉积的时空演化,并讨论了主控因素。研究表明,自晚渐新世—上新世,研究区三角洲在平行岸线方向(NE—SW)自西向东从西巴兰断层西侧向东侧迁移;在垂直岸线方向(NW—SE)则整体表现出从陆向海进积推进。这一演化过程主要受控于古南海自西向东“剪刀式”俯冲引起的造山带的迁移和海平面的升降。并且发现研究区烃源岩、储层和圈闭具有分期、分带特征。通过综合分析,在研究区划分出3个与三角洲有关的油气聚集区,即曾母盆地巴林坚三角洲油气聚集区、文莱—沙巴盆地巴兰三角洲油气聚集区、梅丽干—冠军三角洲油气聚集区。
Using drilling, well logging and seismic data, the spatial-temporal evolution of sediments in the Tertiary Delta in the southern Nansha Sea was reconstructed and the main controlling factors were discussed. The study shows that since the Oligocene-Pliocene, the delta of the study area migrated from west to east from west to east in the direction of parallel shoreline (NE-SW) ) The overall performance from land to sea into the plot to promote. This evolutionary process is mainly controlled by the orogeny migration and sea level rise and fall caused by the “scissors-type” subduction of the ancient South China Sea from west to east. It is also found that the source rocks, reservoirs and traps in the study area have staging and zonation characteristics. Through comprehensive analysis, three delta-related hydrocarbon accumulation areas were identified in the study area, namely, the Beringin Delta oil and gas accumulation area in the Zengmu Basin, the Balaen delta oil and gas accumulation area in the Brunei-Sabah Basin, and the Meilian-Champion Delta hydrocarbon accumulation Area.