论文部分内容阅读
我国南沙海域分布有曾母、万安、南沙海槽、礼乐等众多盆地。这些新生代沉积盆地构造类型多、面积大,新生界巨厚,邻近陆坡的大陆架十分宽广,塑造了多个三角洲,是重要的含油气资源区。盆地的主要烃源岩为渐新世—中中新世湖相泥岩以及下海岸平原沉积。储层发育有砂岩、灰岩(礁灰岩)、基岩等。区域性盖层为上新统—第四系广海相泥质岩。南沙海域含油气构造,具有规模大,隆起幅度高,类型多,成群成带分布等特点。应用波阻抗、烃类检测或模式识别等处理技术,通过盆地模拟技术和沉积岩体积法对南沙海域进行了油气资源评价,其总资源量为581.0047×108t,属于我传统海疆线内达372.0704×108t。文中最后指出曾母盆地的西、北部,万安盆地的南部和南沙海槽盆地的北部是近期重点勘探地区。
China Nansha sea area has Zengmu, Wanan, Nansha trough, ritual and many other basin. These Cenozoic sedimentary basins are characterized by many structures, large areas and huge Cenozoic. The continental shelf adjacent to the slope is very wide and forms many deltas. It is an important petroleum resource area. The main source rocks of the basin are Oligocene-Miocene lacustrine mudstone and sedimentary lower coast plains. Reservoir development of sandstone, limestone (reef limestone), bedrock and so on. The regional caprock is the Pliocene-Quaternary broad marine mudstone. The Nansha sea area has petroliferous structures with large scale, high uplift, many types and distribution in groups. Based on the techniques of wave impedance, hydrocarbon detection or pattern recognition, the hydrocarbon resources of the Nansha sea area were evaluated by the basin simulation technology and the sedimentary rock volume method. The total resource amount was 581.0047 × 108t, belonging to 372.0704 × 108t . Finally, it points out that the south of the Wan’an Basin and the north of the Nansha trough basin in the west and north of the Zengmu Basin are the key exploration areas recently.