下二门油田上层系三角洲前缘砂体成因组合和分布规律  

Genesis assembly and distribution rule of deltaic front sand body in the upper series of strata in Xia'ermen oilfield

作　　者：田建锋[1] 陈振林[2] 杨永利[3] 王春强[4] 

机构地区：[1]西安石油大学油气资源学院,西安710065 [2]中国地质大学武汉资源学院 [3]中国石化河南油田分公司石油勘探开发研究院 [4]中国石油辽河油田公司曙光采油厂

出　　处：《石油地质与工程》2008年第5期18-21,共4页Petroleum Geology and Engineering

摘　　要：下二门油田上层系为一套辨状河三角洲前缘沉积砂体组合。根据岩心资料、录井资料和测井资料共识别出了水下分流河道、河口坝、席状砂、远砂坝、前缘滑塌沉积5种成因砂体和叠置的水下分流河道砂体、叠置的河口坝砂体、水下分流河道-河口坝组合砂体、席状砂-河口坝组合砂体、席状砂-水下分流河道组合砂体、席状砂-滑塌重力流组合砂体等六种砂体组合。在此基础上。从盆底物源供给特征、湖平面变化和湖底地形特点,提出了进积式、退积式和局部低洼堆积式三种三角洲前缘沉积模式.分析了各模式砂体组合在时空上的分布特征.认为本区发育进积式和局部低洼堆积式两种沉积模式。The upper series of strata in Xia'ermen oilfield is com- posed of a series of deltaic front sand body strata.Core,ge- ophysical logging and geological logging data suggest the presence of five sedimentary microfacies as subaqueous dis- tributary channel,mouth bar,sand sheet,distant sand bank and anterior slump deposit,and corresponding six sand body assemblies as incumbent subaqueous distributary channel sand body,incumbent mouth bar sand body,subaqueous distributary channel-mouth bar sand body,sand sheet- mouth bar sand body,sand sheet--subaqueous distributa- ry channel sand body,sand sheet-slump gravity flow sand body.Based on the study on sedimentary facies,from the characters of provenance supply on the basin bottom,the change of lake level and the landform of basin bottom,three kinds of sedimentary models of delta front as progradation, retrogradation and partial stacking are presented;and the temporal and spatial distribution characters of each model of sand body assembly are analyzed.Therefore,it is concluded that two sedimentary models as progradation and partial stacking are existed at the area.

关 键 词：下二门油田 沉积微相 三角洲前缘 砂体成因组合 沉积模式 

分 类 号：TE111.3[石油与天然气工程—油气勘探]