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通过研究近年来获取的浅地层剖面发现,南黄海浅层气主要存在于南黄海东经123°以西的地区,为此进行了该区浅层气成因分析,以探索其来源。将根据南黄海西部地区逾6000km的浅地层剖面解释成果得到的南黄海西部地区浅层气分布概况,与该地区的有机质分布状况进行了对比分析,认为南黄海西部晚更新世末期的泥炭分布与浅层气分布具有较好的一致性,表明晚更新世末期的泥炭是该地区浅层气生成的重要物质基础。3个声学空白区的浅层气可能来自中深部地层。苏北浅滩西北部的大型塌陷坑可能由浅部断层活动引起的浅层气在该处多点喷发形成的塌陷坑复合而成,表明该处中深部地层中可能存在天然气。南黄海中部声学扰动区内浅层气不断自海底逸出,该处断层较多,中深部地层具备生气能力,推测该地区浅层气可能是深部油气泄露的气苗。
Through the study of the shallow stratum profiles obtained in recent years, it is found that the shallow-sea gas in the southern Yellow Sea mainly exists in the area east of the southern Yellow Sea 123o longitude east of the Yellow Sea. Therefore, the shallow gas genesis analysis is conducted to explore its source. The distribution of shallow gas in the western part of the southern Yellow Sea and the distribution of organic matter in this region are compared based on the explanation of the shallow stratum over 6,000 km in the southern part of the southern Yellow Sea. It is concluded that the peat distribution in the late Late Pleistocene in the western part of the southern Yellow Sea and Shallow gas distribution has good consistency, indicating that late-Pleistocene peat is an important material basis for shallow gas generation in the area. Shallow gas in the 3 acoustic blank areas may come from the middle-deep formation. Large subsidence pits in the northwestern part of North Jiangsu shoal may be caused by shallow faulting activities, where subsidence wells formed by multi-eruptions of shallow gas are recombined, indicating that there may be natural gas in the deep strata there. In the middle of the southern Yellow Sea, shallow gas in the area of acoustic disturbance continuously escapes from the seafloor. There are many faults in this area. The middle and deep strata have the capability of generating gas. It is speculated that the shallow gas in this area may be the gas leakage of deep oil and gas.