辽河坳陷欢2-14-16区块大凌河油层沉积特征分析  

Analysis on Sedimentary Characteristics of Dalinghe Reservoir in Huan 2-14-16 Block,Liaohe Depression

作　　者：危宇宁[1,2] 贺萍[3] 王青春[3] 

机构地区：[1]南京大学地球科学与工程学院,江苏南京210093 [2]辽河油田公司欢喜岭采油厂,辽宁盘锦124114 [3]石家庄经济学院资源学院,河北石家庄050031

出　　处：《资源环境与工程》2009年第1期19-22,60,共5页Resources Environment & Engineering

摘　　要：大凌河油层是辽河坳陷欢2-14-16区块的主力含油层系之一。研究表明,大凌河油层是裂谷深陷期深水环境条件下形成的一套浊流沉积物,沉积物具有多期性和突变性,主要岩性以中—细砾岩和岩屑质混合砂岩为主,次为含砾砂岩,砂体在平面上受水道控制明显,呈北西向的条带状展布。根据古地理和古构造条件,以及岩石成分、结构、构造、砂体发育及分布特征,认为辽河坳陷欢2-14-16区块大凌河油层的沉积环境主要是具供给水道的缓坡型湖底扇中扇亚相,由辫状沟道、辫状沟道间、中扇前缘微相组成。Dalinghe Reservoir is one of main oil-bearing formations in Huan 2-14-16 block of Liaohe Depression. Studies show that it is a set of turbidity sedimentary under the condition of deep-water environment in rift deep depressing period with the characteristics of multiphase and mutability, The lithology of reservoir is chiefly mid-fine grained conglomerate and lithic mixed sandstone, as well as the gravel-bearing sandstone next. Sand bodies in the plane are controlled by water channel obviously, resulting in NW-oriented banded distribution. Based on paleogeography, paleotectonic condition, rock composition, structure and tectonics, as well as development and distribution feature of sand body, the authors believe that the sedimentary environment of Dalinghe reservoir is mainly gentle slope-type sublacustrine fan middle fan subphase with supplying waterway, which is composed of braided channel, braided interchannel, middle fan front microfacies.

关 键 词：大凌河油层 湖底扇 沉积相 

分 类 号：TE122.221[石油与天然气工程—油气勘探]