海拉尔盆地的构造特征及其演化

THE STUDY ON THE ORGANIC GEOCHEMISTRY OF ISOMETAMORPHIC COAL AND VITRINITE—ROCK—EVAL PYROLYTIC ANALYSES

张晓东 刘光鼎 王家林

Zhang Xiaodong Liu Guangding Wang Jialin

大庆石油管理局 勘探开发研究院, 163712 2. 中国科学院地球物理研究所 3. 同济大学海洋地质系

Research Institute of Exploration and Development, Bureau of Daqing Petroleum Administration 2. Institute of Geopysics, Academia Simica 3. Department of Marine Gology, Tongji University

海拉尔盆地位于中国北部边陲,是中国板块与西伯利亚板块在海西期缝合带上发育起来的中新生代断-拗盆地。从侏罗纪开始,由于地幔隆起诱发拉张,在区域内首先形成断拗;白垩纪后期由于岩石圈冷却,地壳沉陷而形成拗陷。盆地演化经历两大时期、六个阶段,发育多套生储盖组合,油气资源丰富,主要聚集在北西向的传递断层带,形成多种圈闭类型。

In this paper,detailed Rock-Eval pyrolyses have been carried out on the vitrinite and composition of various reductional- type coals(i.e.coal facies Ⅱ andⅢ)from the Northern Jiangsu and Southern Shandong provinces of the southern part of North China,and their geochemical features are also studied combining with anthracological identification and the measurement of fluorescent parameters.The above studies suggest the following three comments:1)the pyrolytic analysis could be an effective means for the potential evaluation on coal-derived hydrocarbon,2)the type of vitrinite should play a signigicant influence on the hydrocarbon poteintial derived from humic coal,in which rich hydrogen- bearing vit-rinites are the major contributors to hydrocarbon generation,3)exinoid compositions should also be the contributor to the hydrocarbon generation from humic coal,and 4)the rich hydrocarbon-bearing coal with coal facies Ⅱ and Ⅲin the study areas should be a cer-tain type of humic coal which essentially consists of fluorescence vitrinite and exinoid com-positions.

https://doi.org/10.11781/sysydz199402119