摘要
准噶尔盆地西北缘车拐地区目前已经在侏罗系发现了多个油气藏,分析这些油气藏形成的过程及其主要控制因素具有重要意义。基于成藏动力学的三维模拟结果表明,侏罗系油气藏的油气来源主要是二叠系风城组和乌尔禾组烃源岩,油气运移路径主要表现为由沙湾凹陷向车排子凸起、中拐凸起方向。从充注时间看,侏罗系八道湾组始于早侏罗世(178Ma),齐古组始于早白垩世(120Ma),充注过程一直持续到古近纪末期;白垩纪中期的构造运动使车拐地区的地形向现今的"南低北高"发展,改造了已经形成的圈闭,使此前形成的油气藏重新分配,并向北部重新聚集,从而形成现今侏罗系的油气藏主要分布在车拐地区北部和车排子断裂带附近区域,而在车拐地区南部仅存在一些残余油气藏的格局。
Several reservoirs have been found in Jurassic,Che-Guai area,northwest edge of Junggar Basin. Hence,it is of great significance to analyse the formation progress and main controlling factors. The 3D modeling result obtained,based on pool-forming dynamics,shows that the primary sources of reservoirs in Jurassic were the source rock of Permian Fengcheng Formation and Permian Wuerhe Formation,while the primary direction of migration pathways was from Shawan depression to Chepaizi salient and Zhongguai salient. The filling time of reservoirs shows that Jurassic Badaowan Formation started from Early Jurassic（178 Ma） and Jurassic Qigu Formation started from Early Cretaceous（120 Ma）.The filling continued until the end of Paleogene.The tectonic movement that occoured in Cretaceous led the topography of Che-Guai area to be ＂low in the south and high in the north＂ and reconstructed the traps and the reservoirs formed earlier. The northward migration also caused the present reservoirs of Jurassic to be mainly distributed in the northern part of Che-Guai area or near the Chepaizi fault zone,leaving only some residual reservoirs in the southern part of Chen-Guai area.
出处
《地质科技情报》
CAS
CSCD
北大核心
2010年第2期63-67,共5页
Geological Science and Technology Information
基金
国家自然科学基金项目(40602013
40572078)
关键词
排烃史
运聚史
成藏动力学
侏罗系
车拐地区
准噶尔盆地
hydrocarbon expulsion history
migration and accumulation history
pool-forming dynamics
Jurassic
Che-Guai area
Junggar Basin
