四川盆地震旦系-寒武系烃源岩特征与评价

目前,震旦系-下古生界已成为四川盆地勘探的热点和重点.根据烃源岩分析化验数据,结合前人研究成果,从有机质丰度、有机质类型、有机质成熟度以及生烃强度等参数对区内海相烃源岩进行了评价.认为区内烃源岩主要发育在震旦系陡山沱组、震旦系灯影组三段和下寒武统筇竹寺组,岩性以泥岩为主；烃源岩有机碳含量高；有机质类型好,干酪根类型为Ⅰ型；成熟度较高,现今处于高成熟-过成熟阶段,以生干气为主.下寒武统烃源岩条件最好,是该区主力烃源层系,平均生烃强度为65×108m3/km2.

Characteristics and evaluation of Sinian-Cambrian source rock in Sichuan basin

At present,the Sinian-Lower palaeozoic in Sichuan basin has become a hot spot and a key for exploration. According to the data of analysis and test of source rocks and combined with previous research, such as organic carbon content,organic matter type,maturi- ty of organic matter and the intensity to generate hydrocarbon have been evaluated.It shows that source rocks in the area are mainly developed in the Sinian Doushantuo formation,the Sinian Dengying formation third Member and the lower cambrian Qiongzhusi formation.A-mong them, clay-stone is predominant. The organic carbon content is high in the source rock.The organic material type is good. The kerogen type is I .Maturity is high. Gas genera-tion is predominant during the high mature and post mature phases. The hydrocarbon genera-tion intensity shows that the condition of lower Cambrian source rock is the best. And it is the main source layer systems in this area. The average hydrocarbon generation intensity is 6 5 × 10^8m^3/km^2.