苏丹M盆地萨加隆起储层有机包裹体地球化学特征

包裹体中的流体可以作为原始地层流体，用来判别油藏流体注入早期油气的地球化学性质，研究油藏形成初期流体的特性。对苏丹M盆地萨加隆起三套地层含油砂岩有机包裹体成分研究认为，包裹体中原油成熟度不高，主要反映源岩在低熟——成熟时期生成的原油，其源岩的原始母质是以陆源有机质的输入占绝对优势，与该盆地有机质为细菌、水生生物淡水藻类与经过细菌改造陆源有机质的混合输入的认识不同，说明源岩在热演化早期主要是陆源有机质生油；浅层油藏形成初期油气未遭受生物降解作用，后期的构造运动造成原油的蚀变。

GEOCHEMICAL CHARACTERISTICS OF ORGANIC INCLUSIONS FROM THE RESERVOIRS IN SAJIA RISE OF M BASIN, SUDAN

The fluid in inclusions can be regarded as the original fluid in strata. It can be used to distinguish the geochemical behaviours of oil and gas early injecting in reservoirs. This paper studies the organic inclusions in oil bearing sandstone in three suites of formations in the Abu Gabra and sharaf block of Sajia rise of M basin in Sudan. The oil in shallow layers is not biological degradation when the oil inputs the reservoir. The maturity of the curde oil in inclusions isn't high. The crude oil was generated by the hydrocarbon source rock in prematurity lower maturity and the original organic matter was superiority in terrigenous organic matter. It is proved that the terrigenous organic matter mainly generated oil matter in early thermal evolution. It is different from the organic matter in this basin. It is a mixed type of bacteria and fresh water algal with terrigenous organic matter which was modified by bacteria.