济阳坳陷车镇凹陷沙二段浅水三角洲沉积特征及模式  

Sedimentary characteristics and models of shallow-water delta deposits in the second member of the Shahejie Formation in the Chezhen Sag,the Jiyang Depression

作　　者：操应长[1] 韩敏[2] 王艳忠[1] 谭明友[3] 张营革[3] 

机构地区：[1]中国石油大学地球资源与信息学院,山东青岛266555 [2]中国石油化工股份有限公司胜利油田分公司地质科学研究院,山东东营257015 [3]中国石油化工股份有限公司胜利油田分公司物探研究院,山东东营257015

出　　处：《石油与天然气地质》2010年第5期576-582,601,共8页Oil & Gas Geology

基　　金：国家科技重大专项(2009ZX05009-002);教育部新世纪优秀人才支持计划项目(NCET-06-0604);国家自然基金项目(40972080)

摘　　要：车镇凹陷沙二段沉积时期地形相对平缓,普遍发育了浅水三角洲沉积。在钻井岩心描述及相关测试分析的基础上,结合录井、测井等资料分析,对浅水三角洲沉积特征及沉积模式进行了系统研究。车镇凹陷沙二段浅水三角洲前缘亚相是沉积主体,可划分为内前缘和外前缘,具有相带宽、水下分流河道骨架砂体发育、席状砂大面积分布的特征。浅水三角洲砂体以中细砂岩、粉细砂岩和粉砂质泥岩为主;粒度概率图以滚动跳跃加悬浮式、一跳一悬式和两跳一悬式为主;发育反映河流作用的各种层理构造、反映湖浪改造作用的浪成层理和波痕以及生物扰动等沉积构造。Shallow-water delta deposits were generally developed during the sedimentation of the second member of the Shahejie Formation in the Chezheng sag of Jiyang Depression with a relatively flat topography. A systema- tic study of the sedimentary characteristics and models of these delta deposits was performed by integrating core observation and relevant test data with logging data. The shallow-water delta front subfacies dominates the second member of the Formation and can be divided into the inner front and the outer front. It is characterized by large width of facies belt,highly developed under-water distributary channel and large-scale distribution of sheet-like sandbody. The shallow-water delta sandbodies are dominated by medium-to-fine sandstone, siltstone/fine sandstone and silty mudstone. The grain size probability curves present patterns of ＂rolling ＋ skip ＋ suspension＂, ＂ 1 skip ＋ 1 suspension＂ and ＂2 skip ＋ 1 suspension＂. Several types of sedimentary structures were developed,ineluding various fluviatile beddings and wave beddings and marks as well as bioturbation.

关 键 词：浅水三角洲 沉积特征 沉积模式 沙河街组 车镇凹陷 济阳坳陷 

分 类 号：TE122.2[石油与天然气工程—油气勘探]