摘要
运用钻井取芯及测井资料,对烃源岩的沉积结构、生物发育、水化学环境、地球化学特征及生烃模拟实验研究认为,济阳坳陷下第三系纵向上由下向上发育有沙四上亚段、沙三下亚段及沙一段优质烃源岩。它们有机质丰度高,类型好,生烃潜力大,在生物标志化合物、碳同位素及成烃演化上具有明显的差异,为油源分析提供了可靠的证据。根据优质烃源岩与一般烃源岩在生烃潜力及成烃成藏贡献上的差异,结合济阳坳陷多年来的油气勘探实践,有理由认为优质烃源岩的存在是富油凹陷形成的决定条件,优质烃源岩层对陆相湖盆油气形成具有重要意义。
Source rocks of Jiyang Depression are investigated to characterize their sedimentary fabrics, sedimentary environments, biology developments, organic geochemistry, and hydrocarbon formation processes. Together with many years of exploration experiences, wire logs and well cores analyses discover three series of high quality oil prone source rocks in E2,3 Shahejie Formation. They all have good organic types, high abundance of organic materials and high hydrocarbon potentials. Distinctness also has been discovered in biomarkers, carbon isotope compositions and thermal evolutions, which can provide much help in oil/source rocks correlation. Based on the differences between common and high quality source rocks in hydrocarbon potential and in contribution to the hydrocarbon and petroleum pool formation, it is proposed that existing of high quality source rocks or not is the key determining factor for the occurrence of an oil rich depression. High quality source rocks have much significance for the oil and gas formation in terrestrial lake basins.
出处
《地球化学》
CAS
CSCD
北大核心
2003年第1期35-42,共8页
Geochimica
关键词
济阳坳陷
下第三系
烃源岩
有机地球化学
山东
生烃潜力
high quality source rocks
hydrocarbon potential
oil rich subdepression
organic geochemistry
Jiyang Depression
Shandong Province
