STRATIGRAPHIC FRAMEWORK AND EXPLORATION POTENTIAL OF BURIED HILL 428 IN THE BOHAI SEA
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摘要:
在新处理三维地震资料基础上，充分利用钻井岩心、岩屑等岩性数据，结合古生物、测年等分析测试资料，对渤海海域428潜山地层类型、分布及内幕结构特征进行了分析，进而探讨了勘探潜力。结果表明，428潜山基底为太古界花岗岩，428西为2层结构，太古界上覆中生界。428东为3层结构，太古界上覆寒武系和石炭—二叠系，寒武系只分布在潜山东部。基于已钻井油气信息和地层结构分析，认为428潜山油源条件优越，中生界和太古界仍具较大的勘探价值，值得进一步勘探。
Abstract:The stratigraphic types, distribution and structural patterns of the buried hill 428 in the Bohai Sea area are studied by the authors based on the newly processed 3D seismic data, in addition to drilling cores, cuttings and other lithologic records, as well as paleontology and dating data. Exploration potential is then discussed and assessed. The results suggest that the buried hill 428 is based on Archean granite. The west of 428 shows a two-layer texture and the Archean is covered by the Mesozoic, while the east of 428 has a three-layer texture, and the Archean is overlaid with the Cambrian and the Carboniferous-Permian. The Cambrian is distributed only in the east of the buried hill. Based on the oil and gas information and stratigraphic framework from drilling holes, it is inferred that the buried hill 428 has excellent oil source conditions, and the Mesozoic and Archean strata are potential exploration targets.
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Key words:
- Bohai Sea area /
- buried hill /
- stratigraphic framework /
- carbonate /
- exploration potential
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