塔里木东部寒武纪-中奥陶世坡折带沉积特征及勘探潜力  

Sedimentary characteristics and exploration potentials of Cambrian-Middle Ordovician break-slope zones in the eastern Tarim Basin

作　　者：罗俊成[1] 杨海军[2] 朱长见[2] 党青宁[2] 孙雄伟[2] 桑洪[2] 刘永福[2] 杨俊丰[2] 

机构地区：[1]北京大学地球与空间科学学院石油与天然气研究中心,北京100871 [2]中国石油天然气股份有限公司塔里木油田分公司,新疆库尔勒841000

出　　处：《地质科学》2008年第4期661-670,694,共11页Chinese Journal of Geology(Scientia Geologica Sinica)

摘　　要：地震剖面解释及沉积相研究证实塔里木东部轮东—古城地区、罗西地区寒武纪—中奥陶世沉积期发育两个近南北向展布的台地边缘相带。轮东—古城坡折带属缓坡型台地前缘坡折带,坡折带位置自寒武纪至中奥陶世逐渐向东迁移。罗西坡折带属台地边缘陡崖型坡折带,寒武纪—中奥陶世呈多期坡折垂向叠加特征。成藏条件分析表明:轮东—古城坡折带具有良好的寒武系古油藏及奥陶系原油裂解气的勘探前景,而罗西坡折带保存条件好的地区有望获得寒武系古油藏的勘探突破。Based on a study of seismic sections and sedimentary facies, two Cambrian-Middle Ordovician break-slope zones were approved in Lundong--Gucheng and Luoxi areas of the eastern Tarim. The Lundong--Gucheng break-slope zone belonged to slow break-slope along the platform margin, and the shape on seismic sections showed that the Lundong--Gucheng break-slope moved eastward gradually from Cambrian to Middle-Ordovician. The Luoxi break-slope zone belonged to scarp break-slope along the platform margin, and the break-slope was aggraded vertically from Cambrian to Middle Ordovician. The study on the petroleum accumulation conditions indicated that the Lundong--Gucheng break-slope zone might have a considerable exploration potential of Cambrian palaeo-oil pools and Ordovician oil cracked gas, and exploration breakthrough of Cambrian palaeo-oil pools would be made in better conservation areas of the Luoxi break-slope.

关 键 词：坡折带 沉积特征 勘探潜力 寒武纪—中奥陶世 塔里木东部 

分 类 号：P512.2[天文地球—地质学] TE121.1[石油与天然气工程—油气勘探]