[1]郑仰帝,彭光荣,肖张波,等.古近系文昌组湖盆古环境及其对烃源岩的控制作用——以珠江口盆地陆丰15洼为例[J].华南地震,2024,(01):11-24.[doi:10.13512/j.hndz.2024.01.02]
 ZHENG Yangdi,PENG Guangrong,XIAO Zhangbo,et al.Lake Basin Paleoenvironment of Paleogene Wenchang Formation and Its Control Effect on Hydrocarbon Source Rocks—Taking Lufeng 15 Depression in the Pearl River Mouth Basin as an Example[J].,2024,(01):11-24.[doi:10.13512/j.hndz.2024.01.02]
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古近系文昌组湖盆古环境及其对烃源岩的控制作用——以珠江口盆地陆丰15洼为例()
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华南地震[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2024年01期
页码:
11-24
栏目:
海洋地球物理
出版日期:
2024-03-30

文章信息/Info

Title:
Lake Basin Paleoenvironment of Paleogene Wenchang Formation and Its Control Effect on Hydrocarbon Source Rocks—Taking Lufeng 15 Depression in the Pearl River Mouth Basin as an Example
文章编号:
1001-8662(2024)01-0011-14
作者:
郑仰帝12彭光荣12肖张波12黄 鑫12何雁兵12杨兴业12
1.中海石油(中国)有限公司深圳分公司,深圳 518054;2.中海石油深海开发有限公司,深圳 518054
Author(s):
ZHENG Yangdi12PENG Guangrong12XIAO Zhangbo12HUANG Xin12HE Yanbing12YANG Xingye12
1.CNOOC China Ltd._Shenzhen, Shenzhen 518054, China;2.CNOOC Deepwater Development Limited , Shenzhen 518054, China
关键词:
古氧相古生产力优质烃源岩文昌组陆丰15洼
Keywords:
Paleo-xygenation facies Paleoproductivity High-quality source rock Wenchang formationLufeng 15 Depression
分类号:
P618.13
DOI:
10.13512/j.hndz.2024.01.02
文献标志码:
A
摘要:
文昌组湖相泥岩是珠江口盆地陆丰15洼的主力源岩层段,为了恢复文昌期湖盆的古环境,进一步探索优质烃源岩的发育模式,对洼陷内L15-1井的文昌组泥岩开展古生物、有机地球化学、有机岩石学和元素地球化学特征综合分析。研究结果表明:文昌组各层段古环境差异显著,文一~文三段及文五段沉积期水体相对较浅,主要为充氧远源的滨浅湖环境,古生产力水平一般;文四段沉积期水体较深,半深湖—深湖环境,古生产力水平最高。陆丰15洼文昌期古湖盆在淡水—微咸水介质条件下,烃源岩的质量与古水深、古生产力以及古氧相之间呈现较好的正相关关系,文昌组沉积期古气候整体差异不大,温暖湿润的气候对优质烃源岩发育有利。古生产力及古氧相是陆丰15洼文昌组有机质富集的主控因素,实际上是古生产力与保存条件良好的匹配,共同控制了有效烃源岩的发育。
Abstract:
The lacustrine mudstone of Wenchang Formation is the main source rock section of Lufeng 15 depression in the Pearl River Mouth Basin. In order to restore the paleoenvironment of Wenchang Lake Basin and further explore the development model of high-quality hydrocarbon source rocks, a comprehensive analysis of paleontology, organic geochemistry, organic petrology and element geochemistry characteristics of Wenchang Formation mudstone in well L15-1 in the depression was carried out. The research results indicate that there are significant differences in the paleoenvironment of each layer of the Wenchang Formation, with relatively shallow water bodies during the sedimentary periods of the Wen-1 to Wen-3 and Wen-5 sections, mainly the shore-shallow lake environment with oxygenated distant sources, and average levels of paleoproductivity; during the sedimentary period of Wen-4 section, the water body was relatively deep, with a semi-deep lake to deep lake environment and the highest level of paleoproductivity. The quality of hydrocarbon source rocks in the Wenchang period paleo-basin of Lufeng 15 depression is positively correlated with paleowater depth,paleoproductivity,and paleo-xygenation facies under the condition of freshwater and brackish water medium. The difference in paleoclimate during the sedimentation period of Wenchang Formation is not significant, and a warm and humid climate is favorable for the development of high-quality hydrocarbon source rocks. Paleoproductivity and paleo-xygenation facies are the main controlling factors for the enrichment of organic matter in Wenchang Formation of Lufeng 15 Depression. In fact, paleoproductivity and preservation condition are well matched, which jointly control the development of effective source rocks.

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备注/Memo

备注/Memo:
收稿日期:2023-08-10
基金项目:中海油科研项目“陆丰13洼陡坡带构造—沉积响应及油气成藏规律研究”(SCKY-2023-SZ-06)
作者简介:郑仰帝(1987?),男,硕士,工程师,主要从事油气成藏地球化学方面的研究工作。E-mail:zhengyd3@cnooc.com.cn
更新日期/Last Update: 2024-03-30