准噶尔盆地西北缘五、八区佳木河组沉积主控因素及充填模式  

MAJOR CONTROLLING FACTORS AND PACKING PATTERNS OF SEDIMENTATION BODY FROM JIAMU RIVER FORMATION OF FIVEEIGHT AREA IN THE NORTHWEST MARGIN OF JUNGGAR BASIN

作　　者：祝彦贺 王英民[2] 董朔朋 

机构地区：[1]中海油研究总院,北京100027 [2]中国石油大学资源与信息学院物探重点实验室,北京102249

出　　处：《大庆石油地质与开发》2010年第6期24-29,共6页Petroleum Geology & Oilfield Development in Daqing

基　　金：基金项目：国家自然科学基金项目“大型坳陷湖盆坡折带的构造-古地貌-剥蚀沉积响应耦合”（40272057）资助.

摘　　要：准噶尔盆地西北缘五、八区二叠系佳木河组由火山岩、火山碎屑岩和碎屑岩组成，岩性复杂，彼此叠置。这种混积岩层的层序划分和沉积相分析具有较大的难度，同时，火山岩事件性和突发性的沉积特征也使碎屑岩沉积受到破坏。通过分析这种混积地层的形成条件、相控特征以及垂向发育，结合断裂系统发育特征、沉积相平面展布和岩性的突变接触，认为研究区的沉积体明显受控于构造沉降、物源供应强弱和火山喷发事件。在三大主控因素的作用和影响下，形成火山岩与碎屑岩混积的沟谷沉积体系，在等时格架内发育了水道式、水退式、水进式和中心式4种沉积充填模式，该模式对前陆盆地前渊带沉积发育演化及沉积充填具有指导意义。The Jiamuhe Formation developed in the Permian of Five-Eight area in the northwest margin of the Junggar Basin is composed of volcanic rock, volcaniclastic rock and clastic rock with complex lithology. The sequence division and sedimentary facies analysis of this kind of mixed formation is hard. Moreover, the event and sudden property of volcanic rock also make the clastic rock sediment destroyed. By analyzing the forming conditions, phase control features and vertical development of this kind of mixed layer, and considering the developed features of fractured system, plain through-going of sedimentary facies and abrupt contact of lithology, the sedimentary body of the study area is obviously controlled by tectonic descent, intensity of source supply and volcanic eruption event. The gully-valley sedimentary system of volcanic and clastic rock is formed with the effect of 3 major controlling factors. Four sedimentary packing patterns of waterway type, dereliction type, intaking type and centre type in the isochro-nic framework develop in the gully-valley sedimentary system. And this pattern is helpful for evolutionary lea tures of deposited development of foredeep and packing pattern in the foreland basin.

关 键 词：准噶尔盆地两北缘 五 八区 佳木河组 沉积特征 主控因素 

分 类 号：TE121.3[石油与天然气工程—油气勘探]