CAJ | 학술논문

鄂尔多斯盆地苏里格地区上古生界地层为海陆交互及河流～湖泊三角洲相的石炭～二叠系含煤岩系.下二叠统山西组发育煤和暗色泥岩二类烃源岩.根据苏里格及周边地区大量钻井岩芯样品的残余有机碳含量,干酪根同位素,有机质显微组份组成,干酪根镜质体反射率(Ro)等地球化学数据,综合分析了下二叠统山西组烃源岩的有机质丰度,类型和热演化程度.采用有机碳产烃率法,分别计算了煤层和暗色泥岩的生烃强度.在此基础上,结合苏里格地区山西组成藏特征,综合评价认为山西组生烃能力居于中等偏低的级别.
악이다사분지소리격지구상고생계지층위해륙교호급하류～호박삼각주상적석탄～이첩계함매암계.하이첩통산서조발육매화암색니암이류경원암.근거소리격급주변지구대량찬정암심양품적잔여유궤탄함량,간락근동위소,유궤질현미조빈조성,간락근경질체반사솔(Ro)등지구화학수거,종합분석료하이첩통산서조경원암적유궤질봉도,류형화열연화정도.채용유궤탄산경솔법,분별계산료매층화암색니암적생경강도.재차기출상,결합소리격지구산서조성장특정,종합평개인위산서조생경능력거우중등편저적급별.
The marine-terrigenous facies and fluvial to lacustrine delta facies are the main deposition environment in the upper Paleozoic in Sulige region of Ordos Basin. The main hydrocarbon source rocks of Shanxi group of lower Permian in Sulige areas are coals and dark mudstones. According to the residual Toc 、the Kerogen carbon isotopes、the Maceral of organic matter、Ro and other geochemical data of core samples in Sulige areas,we have systemically analyzed the organic matter abundance, type and thermal evolution degree of Shanxi group of Lower Permian. We have used the method of the hydrocarbon generation rate of organic carbon to separately calculate the hydrocarbon-generating intensity of coals and dark mudstones. On this basis and combining with the reservoir forming characteristics of Shanxi group in Sulige areas, this paper holds that the hydrocarbon generation capacity of Shanxi group had the middle or slightly low level.