车排子凸起沙湾组油藏特征与成藏主控因素  

Characteristics and Key Controlling Factors for Oil-Gas Accumulation of Neogene Shawan Reservoir in Chepaizi Swell,Junggar Basin

作　　者：徐常胜[1] 杜社宽[2] 黄建良[1] 邵国良[2] 陈剑[1] 李宏[1] 

机构地区：[1]中国石油新疆油田分公司采油一厂,新疆克拉玛依834000 [2]中国科学院地质与地球物理研究所兰州油气资源研究中心,兰州730000

出　　处：《新疆石油地质》2013年第3期258-261,共4页Xinjiang Petroleum Geology

摘　　要：深入分析了准噶尔盆地车排子凸起新近系沙湾组油藏特征和成藏要素后指出,该凸起中东部沙湾组油藏类型主要为断块、断块-岩性型稀油油藏,数量多、规模小,分布在沙二段;西北部主要为岩性稠油油藏,数量少、规模较大,主要分布于沙一段;沙二段砂体、断裂及圈闭是其成藏主控因素,沙一段岩性圈闭是其成藏关键因素;沙二段砂体主要发育在坡折带附近,其顶部薄砂体控藏特点表现突出;控藏断裂为喜马拉雅运动形成的张性正断裂,它有效沟通了沙湾凹陷侏罗系油源和红车断裂带深层圈闭,同时又起遮挡作用;该组油源主要为沙湾凹陷侏罗系生油岩,其次有深层油藏向上再调整原油的混入,成藏期在第四纪。Based on the study of reservoir characteristics and key controlling factors for oil-gas accumulation in Neogene Shawan formation in Chepaizi swell of Junggar basin, it is considered that the Shawan reseIvoir located in the central-eastern Chepaizi swell is dominated by lots of small-scale fault-blocks and fault block-lithological light-oil pools, and distributed in the second member of Shawan formation; while the northwestern part of the swell is dominated by a small quantity of large-scale lithological heavy-oil reservoirs which are mainly distribut- ed in the first member of Shawan formation. Sandbodies, faults and traps of the second member are the main factors controlling the oil-gas accumulation, while lithological trap of the first member is the key factor of the oil-gas accumulation. The sand bodies in the second mem- ber are predominantly developed near the slope break belt with an obvious feature of reservoir controlled by the top thin sandbodies. Ten- sional normal fault resulted from Himalayan movement is another key controlling factor in the second member, which effectively connects Jurassic oil source in Shawan sag and deep traps in Hong-Che fault belt, and meanwhile acts as a barrier. The oil in Shawan formation origi- nated from Jurassic source rocks in Shawan sag and mixed with some oil from deeper reservoirs. The reservoir formed during Quaternary.

关 键 词：准噶尔盆地 车排子凸起 新近系 沙湾组 成藏 砂体 断裂 坡折带 

分 类 号：TE112.43[石油与天然气工程—油气勘探]