The Pattern of Total Organic Carbon and Sequences within Mudstone Formation, Songliao Basin
-
摘要: 松辽盆地湖相泥岩地层中有机碳呈有规律的分布。在纵向上,特定的地层沉积单元常显示出底部有机碳含量高而向上含量逐渐减小的变化趋势。这种变化规律与相对湖平面的升降及沉积物的供给有关,并且可以在电阻率和声波时差叠覆曲线上以不同程度的幅度差表现出来。根据这种叠覆的测井曲线对松辽盆地英台地区嫩江组泥岩地层中的有机质丰度以及地层层序进行了分析。英台地区嫩江组一、二段泥岩地层以嫩一段和嫩二段下部地层的有机质丰度较高。从泥岩层序对比及测井曲线幅度差分析,该时期英台地区沉积物源来自于北部,其南部烃源岩有机质含量要高于北部。以嫩江组为主要烃源岩的黑帝庙油层的勘探也证实了这一点.Abstract: The total organic carbon (TOC) of the mudstone formation in Songliao basin shows a regular distribution. Vertically, the high TOC value usually appears at base and decreases upwards in a given sediment unit. The regular change of TOC value as this is related to relative lake level change and sediment supply, and can be identified from the overlay log curves of sonic and resistance. Based on this method, it has been analyzed that the abundant of organic carbon and sequences of Nenjiang mudstone formation in Yingtai area, Songliao basin. The study show that the high content organic carbon appears at lower part of Nenjiang Formation, and the direction of sediment supply is from north to south. The content of organic carbon in source rock is higher in the south than north. Oil and gas exploration practice has proven that those results are true.
-
Key words:
- Songliao basin /
- source rock /
- organic carbon /
- logging curves /
- sequencce stratigraphy
-
[1] 纪友亮,张世奇编著.陆相断陷湖盆层序地层学[M].北京:石油工业出版社,1996[Ji Youliang,Zhang Shiqi eds.Sequence stratigraphy of fault-depression lacustrine basin[M]. Beijing: Petroleum Industry Press,1996] [2] Passey Q R, Creaney S,Kulla J B. A practical mocdel for organic richness from porosity and resistivity logs[J]. AAPG Bulletin, 1990,74(5): 1 777～1 794 [3] Stephen Creaney and Passey Q R. Recurring patterns of total organic carbon and source rock quality within a sequence stratigraphic framework[J]. AAPG Bulletin, 1993,77(3) :386～401 [4] 何起祥,刘招君,王东坡等.湖泊相浊积岩的主要特征及其地质意义[J].沉积学报,1984,2(4):33～46[He Qixiang,Liu Zhaojun,Wang Dongpo, et al. Characteristic and geological beating of lacustrine turbidite[J]. Acta Sedimentologica Sinica, 1984,2(4): 33～46] [5] 王鸿祯,史晓颖.沉积层序及海平面旋回的分类级别-旋回周期的成因讨论[J].现代地质,1998,12(1):1～16[Wang Hongzhen,Shi Xiaoyin. Classification order of sedimentation sequence and sea level eycle-A genesis discussion of cycle or periodicity[J]. Modern Geology,1998, 12(1) :1～16] -
点击查看大图
计量
- 文章访问数: 548
- HTML全文浏览量: 9
- PDF下载量: 559
- 被引次数: 0
下载:
