辽河坳陷变质岩潜山内幕油藏成因分析  

Genetic analysis of interior reservoirs in metamorphic buried hill of Liaohe Depression

作　　者：李晓光[1] 刘宝鸿[1] 蔡国钢[1] 

机构地区：[1]中油辽河油田公司,辽宁盘锦124010

出　　处：《特种油气藏》2009年第4期1-5,12,共6页Special Oil & Gas Reservoirs

基　　金：中国石油天然气股份有限公司科技项目"辽河探区西部凹陷油气深化勘探理论与实践"(07-01c-01-04)部分内容

摘　　要：在近几年辽河坳陷勘探实践中,发现了多个变质岩潜山内幕裂缝性油藏,取得了变质岩潜山深层可以富集油气的认识。在总结变质岩潜山内幕油藏特征的基础上,重点从地层岩性特征、烃源岩、供油"窗口"等方面分析了对潜山内幕油藏形成的控制作用。研究表明,变质岩潜山存在多种岩性组合,纵向上呈"似层状";裂缝发育受构造活动和优势岩性双重因素控制,"优势岩性"序列决定了储层与隔层交互发育;潜山内幕多套储、隔层组合与烃源岩有机配置,具有形成潜山内幕油气藏的可能;油气的分布受内幕裂缝体系及致密隔层所控制。该研究为变质岩潜山内幕油藏的认识拓展了勘探领域。Many interior fractured reservoirs have been discovered in buried hills of metamorphic rock in exploration of Liaohe Depression in recent years. It is cognized that oil and gas could accumulate in deep buried hills of metamorphic rock. This paper summarizes the characteristics of interior buried hill reservoirs of metamorphic rock and analyzes the control effect of lithology, source rock and oil window on the formation of interior buried hill reservoirs. The study shows that there are many lithologic associations showing laminar-like distribution vertically; fracture development was subject to both tectonic movement and advantageous lithology; the advantageous lithology sequence decided the alternative development of reservoirs and barriers; the proper configuration of reservoirs, barriers and source rocks provides possibility of hydrocarbon accumulation in interior buried hills; and hydrocarbon distribution is controlled by interior fracture system and tight barriers. The knowledge of interior reservoirs in buried hills of metamorphic rock has broadened exploration area.

关 键 词：潜山内幕油藏 成因 古潜山 变质岩 优势岩性 构造运动 裂缝性储集层 辽河坳陷 

分 类 号：TE122.3[石油与天然气工程—油气勘探]