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五、初次运移的地球化学研究油气的生成和初次运移是发生在同一地质体(生油、生气岩)中的密不可分的过程.油气生成的地化过程对初次运移有重要影响,在初次运移中油气继续发生地球化学变化.生成期与初次运移期是否“默契”配合,对油气的聚集十分重要.1.油、气生成地球化学过程对初次运移的影响(1)油、气的大量生成,是形成源岩异常高压的重要原因:黑德伯格(Hedberg,1971、1974)讨论过甲烷的生成与未充分压实页岩、页岩刺穿、泥火山的关系.由于生物化学和热化学作用,微粒固体有机质分解形成甲烷等气体.这些气体通过三种作用加强泥质岩的高压欠
Geochemical research on primary migration Hydrocarbon generation and primary migration are closely related processes occurring in the same geological body (oil and gas rock) .The geochemical process of hydrocarbon generation has an important influence on the initial migration, During the initial migration, the geochemical changes of oil and gas continue to occur.It is very important for oil and gas to accumulate whether the formation period and the initial migration period are “tacit cooperation” .1.The influence of geochemical process of oil and gas formation on the initial migration (1) Massive formation of oil and gas is an important reason for the formation of abnormally high source rock pressure. Hedberg (1971, 1974) discussed the relationship between methane formation and under-compaction of shale, shale piercing, and mud volcanoes. As a result of biochemistry and thermochemistry, particulate solid organic matter decomposes to form gases such as methane, etc. These gases enhance the high pressure owed by the shale by three actions