腾格尔组和阿尔善组是二连盆地巴音都兰凹陷主要的生烃层位。对巴72×井烃源岩评价表明，阿尔善组和腾格尔组烃源岩有机质丰度整体达到中等—好级别，有机质类型以Ⅰ—Ⅱ1型和Ⅱ1—Ⅱ2型为主，但烃源岩成熟度不高，整体处于未成熟—低成熟热演化阶段。原油色谱—质谱图和生标参数对比均表明，阿尔善组原油主要来源于该组烃源岩，为该组自生油气。

By means of thermal simulating experiment in the open system, this article focused on the hydrocarbon\|generating characteristics of Trias source rock from well Ha 2 in Tarim basin, it also combined with the alteration of maceral and maturation to discuss the characteristics of generating hydrocarbon. The result of experiment indicate that the accumulative yield is only 1.04 mL/g when the heating temperature is under 400℃( value of R O is below 0.8%), it only reach to 8.2% of the total gas yield. When the heating temperature reaches 600℃, the accumulative yield is 9.23 mL/g (about 72.7％of the total gas yield). The peak yield of hydrocarbon is between the heating temperature 500℃ and 600℃ (the value of R O is from 1.24%  to 1.78％), the periodical yield in this evolution period is 6.23 mL/g (about 50% of the total gas yield). Although the humin component still could generate hydrocarbon when the heating temperature reaches 700℃, it has already been entered into the period of dry gas. The period of large quantity of generation has finished.
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