陆相断陷盆地油气空间互补分布成因及分布范围的确定方法

doi:10.13278/j.cnki.jjuese.201606105

摘要/Abstract

摘要： 为了研究陆相断陷盆地油气分布规律，在构造和地层-岩性油气藏、下伏和上覆调整油气藏之间空间分布关系研究的基础上，通过分析不同类型油气藏分布及形成条件之间关系，对陆相断陷盆地油气空间互补分布成因及分布范围的确定方法进行了研究。结果表明：油气聚集圈闭类型和侧向运移条件的差异是造成构造和地层-岩性油气藏平面互补分布的主要原因；反转断裂沟通与下伏油气藏调整程度是造成下伏与上覆调整油气藏剖面互补分布的主要原因。利用地层砂地比值大小可以确定构造和地层-岩性油气藏平面互补分布范围。当地层砂地比大于40%时，主要形成以构造为主的油气藏；当地层砂地比小于20%时，主要形成以地层-岩性为主的油气藏。利用下伏油气藏内反转断裂分布范围便可以确定出上覆调整油气藏范围，上覆调整油气藏分布范围即为其与下伏油气藏剖面互补分布范围。

关键词: 陆相断陷盆地, 地层砂地比值, 构造油气藏, 地层-岩性油气藏, 油气空间互补, 反转断裂

Abstract: In order to study the oil-gas distribution principle in continental faulted depression,based on the research of the space relationship of distribution between structural and stratigraphic-lithologic reservoirs, between underlying and overlying adjustment reservoirs,the cause of oil-gas space complementary distribution and the determining methods of distribution range were studied by analyzing the relationship between distribution of different types of reservoir and their formation conditions. The result indicated that, traps of oil-gas accumulation and conditions of lateral migration are the main factors influencing the plane complementary distribution of structural and stratigraphic-lithologic reservoirs,the communication of reverse fault and the adjustment degree of underlying reservoir are the main factors influencing the complementary distribution of underlying and overlying adjustment reservoirs. The ratio of sandstone to stratum can be used to determine the complementary distribution range of structural and stratigraphic-lithologic reservoirs,when the ratio is greater than 40%, the structural reservoirs mainly formed, when the ratio is less than 20%, the stratigraphic-lithologic reservoirs mainly formed. The distribution range of overlying adjustment reservoirs can be determined by the distribution range of reverse fault in and near the underlying reservoirs,that is the complementary distribution range of underlying reservoirs.

Key words: continental faulted depression, ratio of sandstone to stratum, structural reservoir, stratigraphic-lithologic reservoir, oil-gas space of complementary distribution, reverse fault

中图分类号:

P618.13

姜贵璞. 陆相断陷盆地油气空间互补分布成因及分布范围的确定方法[J]. 吉林大学学报(地球科学版), 2016, 46(6): 1649-1659.

Jiang Guipu. Cause of Oil-Gas Space Complementary Distribution and the Determining Methods of Distribution Range in Continental Faulted Depression[J]. Journal of Jilin University(Earth Science Edition), 2016, 46(6): 1649-1659.

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