珠一拗陷富烃洼陷古近系烃源岩生烃模拟实验及生烃贡献

doi:10.11885/j.issn.1674-5086.2025.01.23.02

摘要/Abstract

摘要： 位于南海北部大陆边缘东部的珠江口盆地是中国重要的含油气盆地，其中珠一拗陷已经发现多个油气田和含油构造，在第二次全国资源评价结果表明，珠一拗陷油气资源以石油为主，天然气为辅，有较大的资源潜力。为系统评价珠江口盆地珠一拗陷内富烃洼陷烃源岩的生烃能力，选取了文昌组半深湖—深湖相、浅湖—半深湖相，恩平组浅湖—湖沼相以及煤系这两套4类烃源岩，在半开放—半封闭体系下进行生烃模拟实验，综合得出烃源岩生烃动力学模型，在“成因法”油气资源评价方法指导下，结合盆地模拟软件，首次利用多相烃源岩从富烃洼陷的热演化程度、烃源岩生烃史及生排烃强度等方面，充分证实珠一拗陷富烃洼陷具有丰富的油气资源，这些成果为珠一拗陷的进一步勘探与开发提供了有力的科学依据。

关键词: 珠一拗陷, 古近系, 烃源岩, 生烃模拟, 盆地模拟

Abstract: The Pearl River Mouth Basin, located in the eastern part of the northern continental margin of the South China Sea, is an important oil and gas bearing basin in China. Among them, many oil and gas fields and oil bearing structures have been found in the Zhu I Depression. The results of the second national resource assessment show that the oil and gas resources in the Zhu I Depression are dominated by oil, supplemented by natural gas, and have great resource potential. In order to systematically evaluate the hydrocarbon generation capacity of source rocks in the hydrocarbon rich sag of Zhu I Depression in the Pearl River Mouth Basin, two sets of four types of source rocks, namely, Wenchang Formation semi deep lake facies, shallow lake semi deep lake facies, Enping Formation shallow lake limnetic facies, and coal measures, were selected to conduct hydrocarbon generation simulation experiments in a semi open and semi closed system to comprehensively obtain the hydrocarbon generation dynamic model of source rocks. Under the guidance of the “genetic method” oil and gas resource evaluation method, combined with the basin simulation software, multiphase source rocks were used for the first time to fully confirm the Zhu I Depression from the thermal evolution degree of the hydrocarbon rich sag, the hydrocarbon generation history of the source rocks, and the intensity of hydrocarbon generation and expulsion. The hydrocarbon rich sag has a large amount of oil and gas resources, and these achievements provide a strong scientific basis for the further exploration and development of Zhu I Depression.

Key words: Zhu I Depression, Paleogene, source rock, hydrocarbon generation simulation, basin simulation

中图分类号:

TE121

詹骏彦, 徐国盛, 冯进, 史玉玲, 熊万林. 珠一拗陷富烃洼陷古近系烃源岩生烃模拟实验及生烃贡献[J]. 西南石油大学学报(自然科学版), 2026, 48(2): 35-48.

ZHAN Junyan, XU Guosheng, FENG Jin, SHI Yuling, XIONG Wanlin. Simulation Experiment and Hydrocarbon Generation Contribution of Paleogene Source Rocks in the Rich Hydrocarbon Depression of Zhu I Depression[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2026, 48(2): 35-48.

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