建南构造志留系流体封存箱与油气运聚  

Silurian Fluid Compartment and Hydrocarbon Migration in Jiannan Structure

作　　者：肖朝晖[1] 李昌鸿[2] 胡晓凤[2] 

机构地区：[1]成都理工大学资源学院,四川成都610059 [2]中石化江汉油田分公司勘探开发研究院,湖北潜江433124

出　　处：《石油天然气学报》2011年第2期45-49,164-165,共5页Journal of Oil and Gas Technology

基　　金：国家科技重大专项(2008ZX05005-003-004)

摘　　要：建南构造下志留统龙马溪组、小河坝组,中志留统韩家店组具有层层含气的特点,且出现明显的压力分带特征,其中韩家店组压力系数达1.63,为典型的高压流体封存箱。根据流体封存箱的"构筑-改造-定型"动态的研究思路对其进行解剖,认为建南构造志留系气藏具有多套盖层叠置,其中流体虽然经历了滞留和幕式排放过程,但无异源流体充注,油气保存良好,其幕式闭合/开启旋回式的封闭机理诠译了志留系气藏层层含气的特点,有助于志留系这一新产层的扩大勘探,从而开拓鄂西渝东区新的勘探领域。Oil bearing characteristics in Longmaxi and Xiaoheba Formations of Lower Silurian and Hanjiadian Formation of Middle Silurian of Jiannan Structure were introduced,it had the property of pressure zonation.Pressure coefficient was as high as 1.63 in Hanjiadian Formation of Middle Silurian,it was a typical high-pressure fluid compartment.It is analyzed in accordance with the study concept of construction-reconstruction-finalization of the fluid compartment,it indicates that the Silurian gas accumulation of Jiannan Structure is characterized by superimposed seals,under which fluids experience detent and episodic expulsion.However,without exotic fluids influx,hydrocarbons are well preserved.The sealing mechanism of episodic closure-opening cycle indicates that gases are extensively presented in each layer of the Silurian system.It is favorable for hydrocarbon exploration in Silurian gas reservoirs,so as to open new exploration fields in the eastern Hubei-western Chongqing Area.

关 键 词：建南构造 志留系 流体封存箱 流体轨迹 

分 类 号：P618.13[天文地球—矿床学]