和什托洛盖盆地北缘泥盆系海相烃源岩评价

应用地表露头样品的有机地球化学分析测试资料,从有机质丰度、类型、成熟度等方面,对和什托洛盖盆地北缘沙尔布尔山泥盆系海相烃源岩进行评价。研究表明:和布克赛尔组灰岩有机碳平均含量为0.31%、呼吉尔斯特组有机碳平均含量为0.72%,校正后分别达到中等烃源岩、好烃源岩的标准;有机显微组分以腐泥组为主,有机质类型全部为Ⅰ型;热演化程度适中,处于成熟阶段。虽然露头样品风化严重,导致各项分析测试数据存在不同程度的偏差,但沙尔布尔山地区泥盆系海相烃源岩具有一定的生烃能力是毋容置疑的。

Evaluation of Devonian Marine Source Rocks in Northern Margin of Heshentuoluogai Basin

Based on organic geochemical data of outcrop samples in the Shaerbuer Mountain which is located in the northern margin of Heshentuoluogai basin,we evaluate the Devonian marine source rocks,including organic abundance,kerogen types and thermal maturity.The results show that the average value of total organic carbon(TOC) of Hebukesaier Formation and Hujiersite Formation samples is 0.31% and 0.72%,respectively.After recovering TOC value,the former reach the standard of medium quality source rock and the latter is the good quality one.The main organic macerals mainly consist in the sapropel,and the kerogen type of organic matter is type I.The thermal maturity of source rock is at the mature stage.Though the measured geochemical data of outcrop samples are greatly influenced by surface weathering,it is confirmed that the Devonian marine source rocks in the Shaerbuer Mountain region have a certain hydrocarbon-generating potential.