伊通盆地烃源岩评价

发布时间：2018-07-06 11:44

本文选题：伊通盆地 + 烃源岩　；参考：《东北石油大学》2015年硕士论文

【摘要】：伊通盆地位于郯庐断裂带北段西半支的佳伊断裂带内,断陷面积3500km2。几轮油气地质综合研究揭示了岔路河断陷暗泥厚度最大,但探明储量却不高,鹿乡断陷五星构造带原油来源不明,这影响了该区的深入勘探开发。伊通盆地在纵向上发育始新统双阳组、奢岭组和永吉组三大烃源岩系,本文通过对不同层位烃源岩的平面发育情况、有机质丰度、有机质类型、有机质成熟度研究表明,它们有很大差别,反映烃源岩对油气的生成贡献不同。从纵向上看,研究区内烃源岩显示出随着层位由老到新其生烃能力由好到差的规律,其中双阳组有机质发育程度高,有机质丰度高,成熟度适中,是伊通盆地的主要烃源层。在横向对比中岔路河断陷烃源岩有效生烃能力强的层位最多,鹿乡断陷次之,莫里青断陷相对最少。伊通盆地原油地球化学特征相似,从油源对比上来看不同源,但可以说明伊通盆地原油母质类型相似,在物性上岔路河断陷与鹿乡断陷和莫里青断陷有所差异,可能是由于岔路河断陷埋深大,成熟度高造成的。
[Abstract]:The Yitong basin is located in the west half branch of the Tan-Lu fault zone with an area of 3500km2. Several comprehensive studies of oil and gas geology reveal that the thickness of dark mud in Chailuhe fault depression is the largest, but the proven reserves are not high, and the source of crude oil in Wuxing structural belt of Luxiang fault depression is unknown, which affects the further exploration and development in this area. The Eocene Shuangyang formation, Ailing formation and Yongji formation are developed longitudinally in the Yitong Basin. The study on the plane development of the source rocks, the abundance of organic matter, the types of organic matter, and the maturity of organic matter in different layers of Yitong Basin show that: They differ greatly, reflecting the different contribution of source rocks to oil and gas generation. From the longitudinal point of view, the hydrocarbon source rocks in the study area show the regularity of hydrocarbon generation ability from old to new with the horizon from good to bad. The Shuangyang formation has a high degree of organic matter development, high organic matter abundance and moderate maturity, and is the main hydrocarbon source bed in Yitong Basin. In the horizontal correlation, the strata with strong effective hydrocarbon generation ability of source rocks in Chailuhe fault depression are the most, Luxiang fault depression is the second, and Morri Qinqing fault depression is relatively least. The geochemical characteristics of crude oil in Yitong basin are similar, which are different from oil source correlation, but it can be concluded that the oil source material types in Yitong basin are similar, and the physical properties of Chailuhe fault depression are different from those of Luxiang fault depression and Morri Qing fault depression. This may be due to the deep burial and high maturity of the Chalu River fault depression.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

【共引文献】