THE SEQUENCE STRATIGRAPHIC MODEL BASED ON THE VARIANCE OF RIVER LEVEL——TAKE THE GUDONG OILFIELD IN THE JIYANG DEPRESSION AS AN EXAMPLE
-
摘要: 对渤海湾盆地济阳坳陷沾化凹陷上第三系馆陶组上段的沉积地层开展了高分辨率层序地层学研究,建立了层序地层格架模型和油藏精细地质模型,为提高油气采收率奠定了基础。与已有的国内外层序地层划分方法不同,文中依据沉积构造、岩性及颜色、粘土矿物类型和地球化学元素含量及其在垂向上的变化等特征所反映出的河水位的变化情况,划分出河流洪泛期、丰水期和枯水期;识别出洪泛期、丰水期和枯水期3种体系域类型,分别发育漫积、侧积和慢积3种准层序组沉积类型。由此建立了洪泛期体系域、丰水期体系域辫状河、丰水期体系域曲流河和枯水期体系域4种河流相沉积模式。Abstract: Taking the upper member of Guantao Formation of the Neogene in the Zhanhua Sag of the Ji-yang Depression,the Bohaiwan Basin as an example,a study of the high-resolution sequence stratigraphy has been carried out.Based on the study,the paper presents a new principle and method for identi-fying sequence.Using the data from the sedimentary structure character,lithology,color of rocks,the changing of clay types and geochemistry elements enrichment which reflect the change of river level,mark off the flooding system tract,high water level system tract and low water level system tract.The corresponding deposition processes of parasequence sets are flooding deposition,lateral accretion and slow deposition.Based on three system tracts,the facies model of four river types are established.
-
[1] Wright V P,Marriott S B.The sequence stratigraphy of fluvial depositional systems the role of floodplain sediment storage[J].Sedimentary Geology,1993,86:203~210 [2] Shanlley K W,Mecabe P J.Perspectives on the sequence stratigraphy of continental strata[J].AAPG Bulletin,1994,78(4):544~568 [3] 张周良.河流相地层的层序地层学与河流类型[J].地质论评,1996,42(增刊):188~193 [4] 蒋小琼,郭建华,管宏林等.塔里木盆地满西地区石炭系层序地层与沉积体系分析[J].石油实验地质,2004,26(4):333~337 [5] 陈清华,曾明,章凤奇等.河流相储层单一河道的识别及其对油田开发的意义[J].油气地质与采收率,2004,11(3):13~15 [6] 陈宝宁,王宝言,李保等.济阳坳陷陡坡带层序地层特征[J].油气地质与采收率,2005,12(6):13~15 [7] 隋淑玲.河流相储层三维流动单元模型建立——以孤东油田为例[J].油气地质与采收率,2005,12(3):12~15 [8] 董春梅,宋春刚.渤海湾盆地渤南油田沙三段沉积微相研究[J].石油实验地质,2003,25(4):375~380 [9] 梁金萍,国景星,于洪洲.冲积-河流相层序地层模式探讨及其在济阳坳陷的应用[J].油气地质与采收率,2005,12(1):15~17 [10] 邓宏文.美国层序地层研究中的新学派——高分辨率层序地层学[J].石油与天然气地质,1995,16(2):89~97 [11] 刘建民,李阳.孤岛地区馆陶组河流沉积地层的高分辨率层序地层样式[J].石油勘探与开发,2000,27(6):31~32 [12] 庞锦莲,罗顺社,高振中等.渤南洼陷下第三系沙四段扇三角洲沉积特征[J].油气地质与采收率,2004,11(1):7~9 [13] 董春梅,林承焰,侯连华等.储集砂砾岩体成因、分布规律及形成条件探讨[J].石油实验地质,1996,18(3):289~297 -
计量
- 文章访问数: 730
- HTML全文浏览量: 68
- PDF下载量: 405
- 被引次数: 0