摘要
针对前人对银额盆地白垩系烃源岩没有进行过系统研究这一情况,从盆地整体的角度出发,以地表和井下烃源岩样品分析数据为依据,阐述了烃源岩的特征及影响因素。研究结果表明,白垩系烃源岩呈现出分布范围广,厚度大的特点,同时又表现出由西向东逐渐变差的特点;白垩系烃源岩有机质以高等植物来源为主,同时具有相当数量的水生生源;干酪根类型以Ⅱ—Ⅲ型为主;白垩系大多数烃源岩已达低成熟—高成熟演化阶段,且各演化程度差异性高。沉积相、构造条件、埋藏深度以及古地温影响着烃源岩的分布和生烃特征。深湖相、滨浅湖相发育了大量的烃源岩。早白垩世的稳定构造环境有利于这些烃源岩的保存以及向油气转化;但受埋藏深度与古地温的影响,其有机质的演化程度具有差异性。
Because there is no systemic research about cretaceous hydrocarbon source rock in the yin'gen-e'ji'naqi basin,we expatiate the characteristics and infectional factor of under-well hydrocarbon source rock and the earths surface hydrocarbon source rock.By this research,We can know that the source rocks distributing area is very great and its thickness is large,too.Whats more,source rock in western area is better than in east area.The organic matter of source rock comes from high-grade plants,and some of these plants are hydrophyte.The types of kerogen are mainly II-III types.The evolvement phases of the source rock are between lower-ripe phase and higher-ripe phase.moreover,the hydrocarbon generation characteristics and area of the source rock is infected by depth,temperature,structure,and sedimentary facies.Most of the source rock are in the depth lake face,moderate depth lake face,coastal shallow lake face.the steady structure surroundings are good to transform to oil and gas for the hydrocarbon source rock.But,evolvements of organic matter are different,because the depth and temperature.
出处
《断块油气田》
CAS
2005年第6期8-10,共3页
Fault-Block Oil & Gas Field
关键词
烃源岩
白垩系
银额盆地
Hydrocarbon source rock,Cretaceous,Yingen-e jinaqi basin.
