摘要
2007年初钻探的QHD34-4-1井是渤中凹陷北部钻遇古近系东营组优质成熟烃源岩层段的第一口预探井。烃源岩地球化学特征及油源对比分析表明,该井东三段发育Ⅱ1型干酪根为主的中等—好烃源岩,烃源岩厚度大,生烃门限深度在3200m附近;4100m附近的东三段烃源岩发生过一定规模的排烃;东营组油气藏自生自储特征明显,新近系油藏油气主要源于东营组烃源岩。QHD34-4-1井的成功钻探,证实了东三段烃源岩为渤中凹陷北部第三套主力烃源岩的推断,也改变了渤中凹陷中北部地区中浅层油气主要源于沙河街组烃源岩的认识,特别是东营组自生自储型隐蔽油气藏的揭示,对推动渤中凹陷中浅层(尤其是古近系东营组)油气勘探将起到积极的作用。
Well QHD34-4-1 drilled in early 2007 is the first preliminary exploratory well that penetrated the excellent and mature hydrocarbon source rocks of Paleogene Dongying Formation in the northern Bozhong sag. According to geochemistry of these source rocks and oil-source correlations, the 3rd member of Dongying Formation in this well is a set of thick moderate-good source rocks predominated by type H, kerogen, and its threshold depth of oil generation is near 3 200 m. A considerable oil expulsion once took place in these source rocks around 4 100 m in depth. The oil and gas reservoirs in Dongying Formation are obviously characterized by self-generating and self-accumulating, and the oil and gas in Neogene reservoirs mainly come from the Dongying source rocks. The success of drilling well QHD34-4-1 has not only confirmed the inference that the 3rd member source rocks of Dongying Formation is the third set of major source rocks in the northern Bozhong sag, but also changed the old idea that the oil and gas of middle-shallow reservoirs in the northern Bozhong sag are mainly from the Shahejie source rocks. Especially, the discovery of Dongying subtle reservoirs with self-generating and self-accumulating will play an active role in driving the hydrocarbon exploration of middle-shallow intervals （particularly Dongying Formation） in the sag.
出处
《中国海上油气》
CAS
2008年第6期367-369,378,共4页
China Offshore Oil and Gas
作者简介
郭永华，男，硕士，高级地质师，主要从事油气地球化学与成藏研究工作。地址：天津市塘沽区609信箱勘探开发研究院（邮编：300452）。
