六盘山盆地早白垩世沉积演化特征分析  

Charcteristics of sedimentary evolution of Early Cretaceous in Liupanshan Basin

作　　者：崔红庄[1] 王金铎[1] 尹克敏[1] 赵海华[1] 

机构地区：[1]中国石化股份胜利油田分公司西部新区研究中心,山东东营257000

出　　处：《西安科技大学学报》2013年第4期411-416,共6页Journal of Xi’an University of Science and Technology

基　　金：国家重点基础研究计划发展计划(973计划)(2003CB214602)

摘　　要：六盘山盆地基底具槽台过渡性质,形成于燕山运动早期,为祁连山前盆地的剪切挤压盆地;白垩系下统六盘山群自下而上可分为三桥组、和尚铺组、李洼峡组、马东山组和乃家河组5个油层组,发育有碎屑岩夹泥质灰岩,在顶部地层含少量的石膏层,垂向上从下向上发育砾岩—粗砂岩—细砂岩—泥岩—泥灰岩和石膏岩的沉积序列,沉积物颜色为从棕红色到灰黑色再从棕红色到灰黑色的沉积旋回,反映了2个水进水退的沉积旋回。根据六盘山盆地六盘山群的颜色、岩石类型、沉积构造等,可以将六盘山群划分为冲积扇、扇三角洲、辫状河三角洲和湖泊等4种沉积相类型。Liupanshan Basin has geosynclinal-plafform transitional nature, formed in early Yanshan Movement, and it is shear-extrusion basin of Qilianshan piedmont basin. Liupanshan group of Lower Cre- taceous included Sanqiao formation, Heshangpu formation, Liwaxia formation, Madougshan and Naijiahe formation from bottom to top, developed argillaceous limestone press from clastic rocks, and a small a- mount of plaster layer on the top of the strata, sedimentary sequence is conglomerate-coarse sandstone- fine sandstone-mudstone-marl and plaster, sediment color developed two brown-red to gray-black deposi- tional cycles, reflecting two water inlet and retreat sedimentary cycles. Based on the color, rock type, sed- imentary structures, Liupanshan group divided into four sedimentary facies types, such as alluvial fan, fan delta, braided river delta and lacustrine.

关 键 词：沉积演化 白垩系 六盘山盆地 

分 类 号：TE122.31[石油与天然气工程—油气勘探]