准噶尔盆地烃源岩生烃模型

HYDROCARBON GENERATION MODEL OF SOURCE ROCK IN JUNGGAR BASIN.

利用高压釜加水模拟的实验方法建立了准噶尔盆地各主要生烃层系的生烃模式，并利用动力学参数建立了盆地主要生烃凹陷（玛湖凹陷和吉木萨尔凹陷）的干酪根生烃模型。准噶尔盆地烃源岩当Ｒｏ为１．０％～１．２％时为生油高峰期，当Ｒｏ大于１０％时开始大量生气；二叠系烃源岩生油、生气能力较强，其他层系烃源岩生油能力弱，但生气能力较强；玛湖凹陷内的上二叠统风城组烃源岩当埋深到３７００ｍ左右时进入成熟窗口，吉木萨尔凹陷内的上二叠统芦草沟组烃源岩当埋深到３２５０ｍ左右时进入成熟窗口。

Hydrocarbon generation models of each major source bed in Junggar basin were established with hydropyrolysis method, and hydrocarbon generation models of kerogen in Mahu and Jimsar sags with dynamics parameters. Oil generation of source rock in Junggar basin peaks at Ro=1.0%～1.2%.At Ro >1.0%, gas is generated in a large amount. The source rock in Permian has strong oil and gas potential, and other source rocks have strong gas potential but weak oil potential, the oil generation threshold of source rock in Fengcheng formation(Upper Permian) in Mahu sag is at the depth of 3 700 m, and the oil generation threshold of source rock in Lucaogou formation(Upper Permian) in Jimsar sag at the depth of 3 250 m.