准噶尔盆地克夏地区二叠系风城组沉积相及沉积模式

Sedimentary facies and depositional model of Permian Fengcheng Formation in Kexia Area of northwest margin of Junggar Basin

贾凡建

JIA Fanjian

中国石化胜利油田分公司勘探开发研究院西部分院，山东 东营 257000

Western Branch of Research Institute of Exploration and Development, Shengli Oilfield Company, SINOPEC,
Dongying 257000, China

根据钻井、测井、地震和分析化验等资料，对准噶尔盆地西北缘克夏地区二叠系风城组沉积相特征进行了研究，认为风城组是一套海退背景下的沉积产物，发育扇三角洲相、海相和火山碎屑岩相，并可进一步划分为6种亚相和8种微相。其中，扇三角洲相主要分布在克百地区，夏子街地区则主要发育火山碎屑岩相，浅海相集中在哈山和风城地区，滨海相发育在扇三角洲侧翼。风城组沉积期，海水不断退出，扇三角洲相沉积范围不断扩大，哈山东部地区也由浅海相逐渐演化为扇三角洲相，说明哈山作为和什托洛盖盆地和准噶尔盆地的分界是后期构造运动的结果。

Based on the drilling, logging, seismic and chemical analysis data, the sedimentary facies of the Permian Fengcheng Formation in Kexia Area of the northwest margin of Junggar Basin is analyzed, It is considered that the Fengcheng Formation is formed under marine regression background with developed fan delta facies, marine facies and volcano clastic facies, which can be further divided into 6 subfacies and 8 microfacies. Among them, fan delta facies are mainly distributed in Kebai Area, volcano clastic facies in Xiazijie Area, bathyal-abyssal facies in Hassan and Fencheng areas, shore shallow marine facies in the fan delta wing. During the sedimentary period of Fengcheng Formation, with the gradual recession of the sea and the expansion of fan delta facies, the bathyal-abyssal facies evolved into fan delta facies in the eastern region of Hassan Area, reflecting Hassan as the boundary between Heshentuoluogai Basin and Junggar Basin is the result of the late tectonic movement.

10.6056/dkyqt201606001