正断层输导油气运移模式及其对油气分布的控制作用

doi:10.13278/j.cnki.jjuese.201606107

摘要/Abstract

摘要： 为了研究正断层在油气成藏与分布中的作用，通过分析正断层输导与不同运移方向所形成的油气分布之间关系，对正断层输导油气运移输导模式及其对油气分布的控制作用进行了研究，结果表明：正断层输导油气运移模式主要有输导油气垂向运移和输导油气侧向运移2种模式。正断层输导油气垂向运移模式又可分为输导油气以垂向运移为主模式和输导油气先垂后侧运移模式；正断层输导油气侧向运移模式又可分为输导油气侧向连接运移模式和输导油气先侧后垂运移模式。正断层输导油气垂向运移模式对油气分布的控制作用主要表现在2个方面：①正断层输导油气垂向运移模式控制着油气剖面分布特征，输导油气以垂向运移为主模式形成的油气可以在盖层上下分布，输导油气先垂后侧运移模式形成的油气只能在盖层之下分布。②正断层上盘高砂地比地层是其垂向输导油气运移模式形成油气平面分布的主要部位。正断层输导油气侧向运移模式对油气分布的控制作用主要表现在2个方面：①正断层输导油气侧向运移模式控制着油气剖面分布特征，输导油气先侧后垂运移模式形成的油气可以在盖层上下分布，输导油气侧向连接运移模式形成的油气只能在盖层之下分布。②反向正断层下盘是其侧向输导运移模式形成油气平面分布的主要部位。

关键词: 正断层, 输导模式, 垂向运移, 侧向运移, 油气分布, 控制作用

Abstract: In order to study the role of normal fault in oil-gas accumulation and distribution, based on analysis of relationship between normal fault transportation and oil-gas distribution in different migration directions, transporting models of oil-gas migration by normal fault and its controlling effect to oil-gas distribution were studied. The result indicates that, there are 2 transporting models of oil-gas migration by normal fault, transporting model of mainly oil-gas vertical migration and transporting model of oil-gas lateral migration. Transporting model of oil-gas vertical migration by normal fault can be divided into transporting model of vertical migration, and transporting model of oil-gas vertical then lateral diversion, transporting model of oil-gas lateral migration by normal fault can be divided into transporting model of oil-gas lateral connected migration and transporting model of oil-gas lateral then vertical migration by normal fault. Controlling effect of transporting model of oil-gas vertical migration by normal fault to oil-gas distribution is showed in 2 aspects:①The transporting models of oil-gas vertical migration by normal fault control oil-gas profile distribution feature, in transporting model of mainly oil-gas vertical migration that oil-gas can distribute over or below caprock, in transporting model of oil-gas vertical then lateral migration that oil-gas can only distribute below caprock. ②The hanging wall layers of high ratio of sandstone to stratum are main oil-gas distribution place. Controlling effect of transporting model of oil-gas lateral migration by normal fault to oil-gas distribution is showed in 2 aspects:①The transporting models of oil-gas lateral migration by normal fault control oil-gas profile distribution feature, in transporting model of oil-gas lateral then vertical migration that oil-gas can distribute over or below caprock, in transporting model of mainly oil-gas lateral connected migration that oil-gas can only distribute below caprock.②The footwall of reverse normal faults are main oil-gas distribution place.

Key words: normal fault, transporting model, vertical migration, lateral migration, oil-gas distribution, controlling effect

中图分类号:

P618.13

刘峻桥, 吕延防, 付广, 孙同文, 李佳兴. 正断层输导油气运移模式及其对油气分布的控制作用[J]. 吉林大学学报(地球科学版), 2016, 46(6): 1672-1683.

Liu Junqiao, Lü Yanfang, Fu Guang, Sun Tongwen, Li Jiaxing. Transporting Models of Oil-Gas Migration by Normal Fault and Its Controlling Effect to Oil-Gas Distribution[J]. Journal of Jilin University(Earth Science Edition), 2016, 46(6): 1672-1683.

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