LITHOSTRATIGRAPHIC CORRELATION OF MESOZOIC AND PALAEOZOIC MARINE STRATA BETWEEN SOUTH YELLOW SEA AND UPPER YANGTZE REGION
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摘要: 海相油气勘探是近十年来我国油气勘探中的重点研究领域,受到越来越多的关注。南黄海地区分布着厚层的前新生代海相地层,为深入了解该套地层,通过收集南黄海盆地的钻井资料以及下扬子陆区的地层资料,将其与上扬子四川盆地的海相地层进行岩性对比和沉积演化分析,了解两套地层的异同性,认为南黄海盆地与上扬子四川盆地的海相中-古生界沉积演化在印支运动以前总体来说是"大同小异",均为以碳酸盐岩沉积为主的稳定沉积,只是在中-古生代构造运动改造时间、规模上存在着一定的差异,上下扬子地区的海相中-古生界具有充分的可比性。还就上下扬子地区的烃源岩特征和油藏保存条件差异等方面进行了简要阐述,这有助于通过借鉴四川盆地海相油气勘探的成功经验,评估南黄海海相地层油气潜力,探索南黄海盆地下一步油气勘探的方向。Abstract: Exploration for marine hydrocarbon has gained great attention in China recently. The Pre-Cenozoic marine strata were widely distributed in the South Yellow Sea. In order to better understand these strata,we made comparison in this article of the marine strata and their depositional features between the South Yellow sea and the Sichuan basin in the upper Yangtze with the well data from the South Yellow sea and the lithostratigraphic data from the Upper Yangtze area. It is concluded that the Mesozoic and Paleozoic marine strata in the two areas dominated by carbonate platform deposits are generally similar before Indosinian movement,but different in the time and scale due to the tectonic movements in Paleozoic and Mesozoic. The sediments are comparable between the upper and lower Yangtze. Also discussed briefly are the source rocks and reservoir storage capabilities between the two regions. The successful exploration for marine oil and gas in the Sichuan Basin has provided a benchmark for the assessment of oil and gas potential and exploration of marine hydrocarbons in the South Yellow Sea.
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Key words:
- upper Yangtze /
- lithostratigraphy /
- sedimentation /
- Sichuan Basin /
- South Yellow sea
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