摘要
研究了坳陷盆地岩性地层油气藏的分布与湖岸线的关系,认为湖岸线附近是岩性地层油气藏发育的有利相带。研究表明湖岸线具有“控砂、控圈、控藏”的特点1湖岸线附近发育着丰富的滨浅湖沉积砂体,可形成多种类型的岩性地层圈闭。2湖岸线进退的旋回性和幕式性为形成良好的储盖组合创造了绝佳的有利条件。3多样的地层岩性圈闭可形成多种油气藏,沿岸坝、滩砂和地层不整合油气藏是其主要的油气藏类型;油气成藏机制为油气的横向运移主要靠不整合和沟谷体系沟通源岩,纵向运移成藏靠断层疏导。4岩性地层油气藏的分布沿湖岸线具有群带性和规模性的特点,地层超覆油气藏主要分布在LST、TST的湖岸线附近;RST对应的湖岸线主要发育了退覆油气藏;而沿岸坝、滩砂、湖湾砂等油气藏分布于各个体系域。
According to the study of the relationship between the distribution of lithostratigraphic reservoirs and lakeshore line, the result shows that the most favorable facies tracts of lithostratigraphic reservoirs are alone lakeshore line. In brief, lakeshore line controls the distribution of sands, traps and oil reservoirs. The followings are characters of lithostratigraphic reservoirs distribution alone lakeshore line： （1）Alone lakeshore line there are multiple kinds of sedimental sand bodies in littoral and shallow take to form different oil reservoirs. （2）Shore line migration is cycling and episodic so there are the best conditions provided for reservoir-seal assemblage formations. （3）Various lithostratigraphic traps can form different reservoirs, such as coastwise bar, shore sandstone, lacustrine bay sandstone and. stratigraphic unconformity reservoirs; reservoir-forming mechanisms include that unconformity and trench systems link up the source rocks for lateral migration of oil and gas but longitudinal migration depends on faults. （4） Lithostratigraphic reservoirs are in belt and in scale alone lakeshore line. The stratigraphic overlap reservoirs are mainly located near the shore lines of LST and TST. The stratigraphic offlap reservoirs are mainly near the shore line of RST. But the reservoirs of coastwise bar, lacustrine bay sandstone and shore sand occur in each tract.
出处
《岩性油气藏》
CSCD
2007年第1期27-31,共5页
Lithologic Reservoirs
关键词
湖岸线
湖岸线控油
岩性地层油气藏
层序地层学
松辽盆地
lakeshore line
controlling oil/gas reservoirs distribution
lithostratigraphic reservoirs
sequence stratigraphy
Songliao Basin
