太古宇潜山油气成藏控制因素分析——以辽河断陷大民屯凹陷法哈牛—曹台地区为例  

Analysis of controlling factors on hydrocarbon accumulation in Archaeozoic buried hill-a case study with Fahaniu-Caotai area in Damintun depression of Liaohe rift basin

作　　者：李军生[1,2] 庞雄奇[1] 宁金华[2] 初振淼[3] 

机构地区：[1]中国石油大学(北京)资源与信息学院,北京102249 [2]中国石油辽河油田分公司勘探开发研究院,辽宁盘锦124010 [3]中国石油辽河油田分公司冷家油田开发公司,辽宁盘锦124010

出　　处：《油气地质与采收率》2010年第4期17-19,23,共4页Petroleum Geology and Recovery Efficiency

基　　金：国家重点攻关课题"松辽盆地及渤海湾盆地北部复杂隐蔽油气藏地质评价和勘探开发关键技术研究"子课题(2001BA605A-08-04)

摘　　要：从油气形成条件分析入手,对大民屯凹陷法哈牛—曹台地区太古宇潜山油气成藏控制因素进行研究。研究结果表明,油源条件是决定基岩潜山圈闭能否成藏的关键,研究区具备良好的油源条件;在侧向供油的情况下,与潜山接触的烃源岩的深度控制了潜山油气藏的底界深度。储层是控制油气富集程度的重要因素,太古宇潜山储层岩性主要为变质岩,储层类型为裂缝型,以构造裂缝为主,裂缝控制着油气的富集程度。构造条件在潜山圈闭形成及储层发育过程中起到了重要的作用,同时,构造运动过程中形成的断层在沟通烃源岩及油气在潜山内部的运移中起到了通道作用。封闭条件是油气成藏的必要条件之一,对油气藏的分布起到一定的控制作用。研究区发育的泥岩、非渗透层及凝固的高凝油层等为油气藏的形成提供了良好的封闭条件。This paper studies the factors controlling oil and gas accumulation in the Archaeozoic buried hill of Fahaniu-Caotai area in Damintun depression with respect to the hydrocarbon generation conditions.It is believed that oil-source conditions are critical for hydrocarbon accumulation in buried hill traps,and no buried hill reservoir could form without certain oil and gas source conditions.This region possesses favorable oil-source conditions which provided material base for forming buried hill reservoir.The Archaeozoic buried hill reservoirs in the study area are fractured reservoirs dominated by metamorphic rock and tectoclase.Tectonic setting had played a significant role in the process of buried hill trap formation and reservoir development.Moreover,the faults formed during tectonic movement were important for hydrocarbon communication within source rock and for migration of oil and gas in buried hill.Sealing condition is necessary for hydrocarbon accumulation and has controlled the reservoir distribution.The mudstone developed in this area and the abnormal fluid pressure within the mudstone,impervious bed,dyke,bar and condensate oil layer all provided good sealing conditions for hydrocarbon accumulation.

关 键 词：太古宇 古潜山 高凝油油藏 法哈牛-曹台地区 大民屯凹陷 辽河断陷 

分 类 号：TE112.36[石油与天然气工程—油气勘探]