准噶尔盆地腹部油气富集规律及其成藏特征

OIL-GAS ENRICHMENT LAWS AND RESERVOIR-FORMED CHARATERISTICS IN THE CENTRAL PART OF ZHUNGE'ER BASIN

在分析研究了准噶尔盆地腹部主要烃源岩特征、分布及其油气运移规律的基础上，指出了不同类型烃源岩生烃凹陷控制着其所生成油气的分布范围：中央隆起以南为侏罗系油气主要分布区；以北为二叠系油气主要分布区；中央隆起则为二者共存区。准噶尔盆地腹部油气藏的形成具有“双源多期”的成藏特点，决定了本区具有深、浅两套主要含油气系统；浅部含油气系统可形成侏罗系自生自储的煤成油气藏和古生新储的以二叠系油气为主的次生油气藏；深部含油气系统主要聚集二叠系烃源岩所生成的油气。

ased on studying the characteristics,distributions and migration laws of main hydrocarbon source rocks in the central part of Zhunge'er Basin,it is pointed out that the different oil-gas distributions are controlled by the different hydrocarbon source sags.The south to central uplift is the main distributive area of Jurassic oil-gas;the north to the central uplift is the main distributive area of Permian oil-gas;the central uplift is the oil-gas coexistent area of Jurassic and Permian.The oil-gas reservoirs in the central part of Zhunge'er Basin have the characteristic of multisources and multistage,which makes there are two sets of deep and shallow main hydrocarbon-bearing systems. Jurassic autogeny and autostorage coal-formed reservoirs and Permian palaeogeny and neostorage secondary reservoirs are formed from the shallow hydrocarbon-bearing system;the oil-gas from Permian source rock is mainly accumulated in the deep hydrocarbon-bearing system.