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通过对南苏门答腊盆地M区块古近系烃源岩样品进行地球化学综合研究表明:该区古近系烃源岩有机碳含量较高;烃源岩显微组分中以镜质体为主,其次为腐泥组+壳质组,惰质体组分含量较少;烃源岩有机质类型较好,为Ⅱ1型、Ⅱ1/Ⅱ2混合型、Ⅱ2型、Ⅲ型干酪根,具有生油、生气双重性质;RO值的分布范围为0.44%～0.71%,平均值为0.62%,有机质处于未成熟—成熟热演化阶段。受烃源岩有机质类型及其成熟度的影响,研究区内普遍存在“上油下气”的油气藏纵向叠合模式。因此,建议在研究区内实施“浅层找油、深层探气、油气并举”的油气勘探部署方案。
The comprehensive geochemical study of the Paleogene source rocks in Block M, South Sumatra Basin shows that there is a high organic carbon content in the Paleogene source rocks in this area, and the vitrinite is the main component in the source rocks , Followed by the sapropelite + chitin group, and the content of the inertinite is relatively small. The source rocks are well organic type, which are type Ⅱ1, type Ⅱ1 / Ⅱ2, type Ⅱ2 and type Ⅲ kerogen, The distribution of RO value ranges from 0.44% to 0.71% with an average of 0.62%. The organic matter is in the immature-mature thermal evolution stage. Due to the influence of organic matter type and maturity of source rocks, longitudinal superimposition patterns of oil and gas reservoirs are commonly found in the study area. Therefore, it is suggested to implement the exploration and deployment plan for oil and gas exploration in the study area such as “shallow oil exploration, deep gas exploration and simultaneous oil and gas exploration”.