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珠江口盆地位于华南大陆南缘,在欧亚、印度洋和太平洋三大板块交汇的南海北部,是中国南海北部最大的中新生代沉积盆地,是我国海上重要油气资源基地之一。其中珠江组在珠江口盆地中多个层段都有油气发现,因此本文的研究对象是珠江组三角洲。本文以沉积学的理论为基础,结合前人的研究资料,对珠一坳陷HZ21井区珠江组三角洲沉积相进行详细的研究,从而建立珠江组三角洲沉积模式。
The Pearl River Mouth Basin is located in the southern margin of the southern China continental margin. It is the largest Meso-Cenozoic sedimentary basin in the northern South China Sea and is one of the major oil and gas resource bases in China. It is located in the northern South China Sea where Eurasia, the Indian Ocean and the Pacific meet. Among them, the Pearl River Formation has hydrocarbon discovery in many intervals in the Pearl River Mouth Basin. Therefore, the research object of this paper is the Pearl River Delta. Based on the theory of sedimentology and combining with previous research data, the sedimentary facies of Zhujiang Formation Delta in HZ21 well of Zhu 1 Depression is studied in detail, and the delta depositional model of Pearl River Formation is established.