摘要
通过系统研究区内长8烃源岩的有机质丰度、有机质类型和有机质成熟度,对其生烃潜力进行了评价.研究结果表明:研究区长8烃源岩的TOC质量分数、氯仿沥青"A"质量分数、总烃质量分数和生烃潜量S1+S2反映了其有机质丰度整体较高,属于好的生油岩;岩石热解类型指数S2/S3和氯仿沥青"A"族组成反映了其有机质类型整体较好,以腐殖腐泥型(Ⅱ1型)为主,少量为腐泥型(Ⅰ型)、腐泥腐殖型(Ⅱ2型);最高热解温度Tmax和生物标志化合物成熟度参数反映了其有机质已经进入了成熟的演化阶段.据此,认为华庆地区长8有效烃源具有较好的成烃潜力,作为有效油源岩意义较大,在后期的相关研究中应予以重视.
Through a systematic analysis of the organic matter abundances, organic matter types and organic matter maturity of Chang-8 source rocks in Huaqing area, the hydrocarbon generation potentials were evaluated. The TOC content, chloroform bitumen ＂A＂ contents, total hydrocarbon content and potential hydrocarbon generation amount of Chang-8 source rocks reflected a kind of good source rocks with high organic matter abundance. The index type of rock pyrolysis （S2/S3） and group composition of chloroform bitumen ＂A＂ reflected good organic matter types of which the main type was humic-sapropelic and a small amount was of sapropelic type and humic type. The maximum pyrolysis temperature（Tmax） and maturity parameters of biomarkers reflected a mature evolution degree of organic matter in Chang-8 source rocks. According to the above, the Chang-8 source rocks in Huaqing area have a good hydrocarbon generation potential of being significantly effective oil source rocks, and attention should be paid to it in future studies.
出处
《兰州大学学报（自然科学版）》
CAS
CSCD
北大核心
2011年第6期18-22,32,共6页
Journal of Lanzhou University(Natural Sciences)
基金
国家自然科学基金项目(40772069
40872092)
中国科学院院地合作局支甘项目
关键词
延长组
长8油层组
烃源岩
生烃潜力
华庆地区
鄂尔多斯盆地
Yanchang formation
Chang-8 reservoir
source rock
hydrocarbon generation potential
Huaqing area
Ordos basin
