印度尼西亚苏拉威西地区新生代盆地烃源岩特征

Source Rock Characteristics of Cenozoic Basins in Sulawesi Region,Indonesia

利用钻井资料,在地层分析和沉积相研究基础上,结合油样、油苗、岩芯和露头样品的地球化学分析,对印度尼西亚苏拉威西地区新生代盆地烃源岩发育时代、地球化学特征、沉积环境进行了系统分析。结果表明:苏拉威西地区新生代盆地主力烃源岩发育层位是古新统—始新统,普遍含煤或碳质泥岩,有机质类型为偏腐殖型,有机质丰度中等—好,具备油气兼生的能力;古新统—始新统烃源岩沉积相带为河流—沼泽相和潮坪—潟湖相,主要残存于裂谷期断层控制的坳陷内,主体部位烃源岩热演化已进入成熟—过成熟阶段,具备为油气藏的形成提供充足烃类的能力。

Based on the drilling data,strata and sedimentary facies,combined with the geochemical analysis of oil sample,seepage,core and outcrop,the development era, geochemical characteristics and sedimentary environment of source rocks in Sulawesi region,Indonesia were analyzed systematically.The results show that the main hydrocarbon source rocks of Cenozoic basins in Sulawesi region develop in Paleocene-Eocene,and generally contain coal or carbonaceous mudstones;the organic matter is partial humic with medium-good abundance,so that the source rocks have the ability to generate hydrocarbon;the sedimentary facies of Paleocene-Eocene source rocks is fluvial-swamp and flat-lagoon;the source rocks remain in the sags controlled by faults at rift stage;the thermal evolution of source rocks in the main parts is at the mature-overmature stage,so that the source rocks have the ability to provide sufficient hydrocarbon for the forming of hydrocarbon accumulation.