【摘要】 从油油对比、油源对比等方面对临南地区沙四段进行了深入研究,提出临南地区存在沙三型、沙四型和混合型三种原油；沙四段烃源岩早期生、排出低熟油,晚期生、排出成熟油。前者分布在凹陷的边部,后者在凹陷内部成藏。从而证实了沙四段烃源岩对油气成藏确有贡献,为研究以沙四段为源岩的油气成藏规律和指明有利勘探方向提供了依据。更多还原

【Abstract】 According to correlations of oils and source rocks in Linnan area,it shows that there are three types of oils,namely Es₃,Es₄,and mixed one.The low-mature oil is ejected from early source rocks,and mature oil from later ones,of Es₄.The former distributes in the edge and the later in the inside,of the basin.Therefore,it is confirmed that source rock of Es₄ has a great effect on the oil and gas deposits.This provides the basis for studying on forming regularities of oil and gas deposits and the favorable exploration orientations.更多还原