哈山地区原油地化特征及同源双向充注效应

摘要

针对哈山地区原油供烃来源不明及有利勘探方向不清的问题,利用色谱质谱、碳同位素分析等手段,对该区烃源岩、原油与输导体系进行了精细地球化学研究,剖析了原油的成藏过程与运移路径.研究表明:哈山与玛湖2个地区在烃源岩沉积环境、有机质成熟度、碳同位素等特征上存在差异;哈山构造带原油具有同源双向、多输导体系的成藏特征;该区不同地质单元的源-输导体系-储层油源对比(圈闭)空间的差异配置控制其油气成藏及分布.%Aiming at the problem of unclear crude oil supply source and indistinct favorable exploration directions in the Hashan area, we used some techniques (such as chromatography-mass spectrometry and carbon isotope analysis) to finely study the geochemistry of the source rock, crude oil and transport system of this area, and dissected oil accumulation process and migration pathways.The study results indicate that there are some differences in source rock deposit environment, organic matter maturity and carbon isotope etc.between the Hashan area and the Mahu area.The crude oil accumulation in the Hashan area has cogenetic-bidirectionalfeature and multiple transport systems.The differential matching of source-transport system-correlation between source and reservoir (trap) between various tectonic units controlled hydrocarbon accumulation and distribution in this area.