蒙古戈壁盆地群烃源条件分析

Hy- drocarbon source analysis of Gobi basin group in Mongolia.

蒙古境内的戈壁盆地群与我国二连盆地有相近的地质特征,对于该区的生油条件,西方和前苏联的学者曾用少量的露头和浅井样品作过分析。文章利用该区深探井取心及岩屑资料,系统地研究了东戈壁盆地群的烃源条件,对烃源岩的纵向分布、有机质类型及热演化进行了分析,认为下宗巴音组是区域主力生油岩,其生烃门限为1440m,而且戈壁盆地群具有形成中型油田的能力。

Gobi basin group in Mongolia has similar geological characteristics with Erlian basin in China. West and Russian geologists have analyzed the oil generation conditions through few outcrops and shallow well samples. According to the data of cores and cuttings in deep exploration wells drilled in this area, and the hydrocarbon source condition in Dong Gobi basin group, such as the vertical distribution of source rock, the type of organic matter and thermal evolution is studied systematically. It is considered that the lower Zuunbay-an formation is regional main source rocks, the threshold value of hydrocarbon generation is 1440m, and the Gobi basin group has the ability to form middle size oilfields.