摘要
车拐地区二叠系储层岩岩性单一，储集空间发育较好。夏子街组（Ｐ２ｘ）碎屑岩中，自生沸石类矿物溶蚀孔发育，是油气主要储集空间，镜下证实至少有过两次油气运移；佳木河组（Ｐ１ｊ）火山岩和火山碎屑岩主要储集空间为气孔溶孔和构造裂缝，油气运移也有明显的期次。相比而言。
The Permian reservoir rocks in the Chepaize Xiaoguai region along the northwestern margin of the Junggar Basin, northwestern China are characterized by simple rock types and well developed reservoir spaces. The storage spaces in the clastic rocks from the Xiazijie Formation consist dominantly of the secondary intercrystal and intracrystal solution pores of the authigenic zeolite. The relevant data show that the porosity of these rocks tends to increase with increasing zeolite contents, and that more than two phases of oil and gas migration can be recognized in the reservoir rocks in the formation. In contrast, the storage spaces in the volcanic and volcaniclastic rocks from the Jiamuhe Formation are represented by well developed structural fissures and amygdales (vesicles). These fissures were formed in several phases and became well connected, and thus may serve as better storage spaces than the former ones.
关键词
油气藏
储集层
含油性
准噶尔盆地
Chepaize Xiaoguai region
Permian reservoir rocks
hydrocarbon potential
