准噶尔盆地西北缘扇体形成特征及油气分布规律  

Characteristics of fan forming and oil-gas distribution in west-north margin of Junggar Basin

作　　者：雷振宇[1] 卞德智 杜社宽[3] 蔚远江[1] 马辉树[3] 

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]中国石油天然气勘探开发公司,北京100034 [3]中国石油新疆油田分公司,新疆克拉玛依834000

出　　处：《石油学报》2005年第1期8-12,共5页Acta Petrolei Sinica

基　　金：中国石油天然气集团公司"九五"重点科技攻关项目(970211)部分成果。

摘　　要：准噶尔盆地西北缘广泛发育二叠纪侏罗纪冲积扇、水下扇、扇三角洲等砾质粗碎屑沉积。研究结果表明,其成因和分布与同期的断裂活动有密切的关系,从二叠纪侏罗纪,构造活动逐渐减弱,扇体规模逐渐变小。在平面上,构造活动的位移导致了扇体的迁移,反映出构造活动对扇体分布的控制。总体来看,百口泉夏子街地区构造活动性最强,延续时间最长,形成的扇体规模较大,叠置程度高且迁移明显;在车拐—克拉玛依地区,活动性较弱,形成的扇体规模小,叠置程度差且迁移小。油气聚集主要受到断裂构造和扇体的控制。由于断裂活动(迁移)规律的不同,导致不同时期、不同地区扇体的发育特征也不同,从而造成了不同构造带(部位)油气藏分布的差异。The Permian-Jurassic alluvial-fan, subaqua-fan and delta-fan were widely distributed in the west-north margin of Junggar Basin. Their genesis and distribution are relative to the contemporaneous action of faults. Tectonic movement in this area gradually weakened from the Permian to the Jurassic period, and the dimensions of fan was reduced step by step. The movement of tectonic activity resulted in transfer and superimposition of various fan. Since the tectonic movement in Baikouquan-Xiazijie area was strong and extended for a long time, there developed some fans with large dimension, good superimposition and obvious migration. Contrarily, the tectonic movement in Chepaizi-Zhongguai area was weak and resulted in some small fans with poor superimposition and less migration. Fault and fan controlled the oil-gas gathering in this area. The active regularity of the faults is obviously different, which results in the fans developed in different strata and causes the different oil-gas distribution.

关 键 词：准噶尔盆地 西北缘 断裂活动 扇体迁移 油气分布 

分 类 号：TE111.2[石油与天然气工程—油气勘探]