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Cenozoic Sea‐land Transition and its Petroleum Geological Significance in the Northern South China Sea
Acta Geologica Sinica-English Edition ( IF 3.3 ) Pub Date : 2021-01-08 , DOI: 10.1111/1755-6724.14628 Zhigang ZHAO 1 , Hao ZHANG 2 , Yuchi CUI 2 , Wu TANG 1 , Peijun QIAO 2
Acta Geologica Sinica-English Edition ( IF 3.3 ) Pub Date : 2021-01-08 , DOI: 10.1111/1755-6724.14628 Zhigang ZHAO 1 , Hao ZHANG 2 , Yuchi CUI 2 , Wu TANG 1 , Peijun QIAO 2
Affiliation
The process of Cenozoic sea‐land changes in the northern South China Sea (SCS) controlled the sedimentary filling pattern and played an important role in the petroleum geological characteristics of the northern marginal sedimentary basins. Under the control of the opening process of the SCS, the northern SCS Cenozoic transgression generally showed the characteristics of early in the east and late in the west, and early in the south and late in the north. The initial transgression occurred in the Eocene in the Taixinan Basin (TXNB) of the eastern SCS, while the transgression occurred until the Pliocene in the Yinggehai Basin (YGHB) of the western SCS. International Ocean Discovery Program (IODP) expeditions (Expeditions 367/368) revealed that the initial transgression of the SCS basin occurred at approximately 34 Ma, which was the initial opening time of the SCS. The period of drastic changes in the sedimentary environment caused by large‐scale transgression corresponded to the opening time of the southwestern subbasin (approximately 23 Ma), which also represented the peak of the spreading of the SCS. The sea‐land transition process controls the distribution of alternating continent‐marine facies, marine facies source rocks and reservoirs in the basins. The marine facies source rocks of the basins in the northern SCS have a trend of gradually becoming younger from east to west, which is consistent with the regional process of gradual transgression from east to west. Regional sea‐level changes were comprehensively influenced by SCS opening and global sea‐level changes. These processes led to the early development in the east and south and late development in the west and north for the carbonate platform in the SCS. Carbonate platforms form another type of “self‐generating and self‐accumulating” oil‐gas reservoir in the northern SCS. The sea‐land transition controlled the depositional filling patterns of different basins and laid the foundation of marine deposits for oil and gas resources. The source‐reservoir‐cap assemblage in the northern SCS was controlled horizontally by provenance supply and sedimentary environmental changes caused by sea‐land transition and vertically by the tectonic evolution of the SCS and regional sea‐level changes.
中文翻译:
南海北部新生代海陆过渡及其石油地质意义
南海北部(SCS)新生代海陆变化过程控制了沉积充填模式,并在北部边缘沉积盆地的石油地质特征中发挥了重要作用。在南海的开放过程的控制下,北南海新生代的海侵一般表现为东部早期,西部晚期,南部早期和北部晚期。最初的海侵发生在南海东部的泰新南盆地(TXNB)的始新世,而海侵发生直到南海西部的莺歌海盆地(YGHB)的上新世。国际海洋发现计划(IODP)考察(Expeditions 367/368)揭示,南海盆地的初始海侵发生在大约34 Ma,这是SCS的初始开放时间。大规模海侵引起的沉积环境急剧变化的时期对应于西南子盆地的开放时间(约23 Ma),也代表了南海扩张的高峰。海陆过渡过程控制着陆相交替的海相,海相烃源岩和盆地储层的分布。南海北部盆地海相烃源岩具有从东向西逐渐年轻的趋势,这与从东向西渐进的区域性过程是一致的。SCS开放和全球海平面变化全面影响了区域海平面变化。这些过程导致了南海碳酸盐岩平台在东部和南部的早期开发以及在西部和北部的晚期开发。碳酸盐岩台地构成了南海北部的另一类“自生自蓄”的油气藏。海陆过渡带控制了不同盆地的沉积充填模式,为油气资源海相沉积奠定了基础。南海北部的源-储-盖组合水平受海陆过渡引起的物源供应和沉积环境变化的控制,而垂直受南海构造演化和区域海平面变化的控制。海陆过渡控制了不同盆地的沉积充填模式,为油气资源的海洋沉积奠定了基础。南海北部的源-储-盖组合水平受海陆过渡引起的物源供应和沉积环境变化的控制,而垂直受南海构造演化和区域海平面变化的控制。海陆过渡控制了不同盆地的沉积充填模式,为油气资源的海洋沉积奠定了基础。南海北部的源-储-盖组合水平受海陆过渡引起的物源供应和沉积环境变化的控制,而垂直受南海构造演化和区域海平面变化的控制。
更新日期:2021-02-22
中文翻译:
南海北部新生代海陆过渡及其石油地质意义
南海北部(SCS)新生代海陆变化过程控制了沉积充填模式,并在北部边缘沉积盆地的石油地质特征中发挥了重要作用。在南海的开放过程的控制下,北南海新生代的海侵一般表现为东部早期,西部晚期,南部早期和北部晚期。最初的海侵发生在南海东部的泰新南盆地(TXNB)的始新世,而海侵发生直到南海西部的莺歌海盆地(YGHB)的上新世。国际海洋发现计划(IODP)考察(Expeditions 367/368)揭示,南海盆地的初始海侵发生在大约34 Ma,这是SCS的初始开放时间。大规模海侵引起的沉积环境急剧变化的时期对应于西南子盆地的开放时间(约23 Ma),也代表了南海扩张的高峰。海陆过渡过程控制着陆相交替的海相,海相烃源岩和盆地储层的分布。南海北部盆地海相烃源岩具有从东向西逐渐年轻的趋势,这与从东向西渐进的区域性过程是一致的。SCS开放和全球海平面变化全面影响了区域海平面变化。这些过程导致了南海碳酸盐岩平台在东部和南部的早期开发以及在西部和北部的晚期开发。碳酸盐岩台地构成了南海北部的另一类“自生自蓄”的油气藏。海陆过渡带控制了不同盆地的沉积充填模式,为油气资源海相沉积奠定了基础。南海北部的源-储-盖组合水平受海陆过渡引起的物源供应和沉积环境变化的控制,而垂直受南海构造演化和区域海平面变化的控制。海陆过渡控制了不同盆地的沉积充填模式,为油气资源的海洋沉积奠定了基础。南海北部的源-储-盖组合水平受海陆过渡引起的物源供应和沉积环境变化的控制,而垂直受南海构造演化和区域海平面变化的控制。海陆过渡控制了不同盆地的沉积充填模式,为油气资源的海洋沉积奠定了基础。南海北部的源-储-盖组合水平受海陆过渡引起的物源供应和沉积环境变化的控制,而垂直受南海构造演化和区域海平面变化的控制。