华南地质与矿产
華南地質與礦產
화남지질여광산
GEOLOGY AND MINERAL RESOURCES OF SOUTH CHINA
2012年
2期
184-188
,共5页
水下冲积扇%深水浊积扇%沉积特征%分布特征%低位体系域%沙三段中亚段%牛庄洼陷
水下遲積扇%深水濁積扇%沉積特徵%分佈特徵%低位體繫域%沙三段中亞段%牛莊窪陷
수하충적선%심수탁적선%침적특정%분포특정%저위체계역%사삼단중아단%우장와함
fluvial fan of underwater%turbidite fan of deep-water%depositional features%Low-stand system tract%Niuzhuang subsag
依据录井、测井、岩芯和孢粉化石分析等,认为牛庄洼陷发育于原沙三下亚段上下两套油页岩之中的砂体应属于沙三中亚段低位体系域,为水下冲积扇和深水浊积扇;并阐明了其沉积分布特征,且进一步运用层序地层学原理研究认为研究区低位域砂体沉积相组合-层序及体系域叠置模式为低水位深水浊积扇-湖平上升初期的低水位水下冲积扇-后期的湖侵水道。
依據錄井、測井、巖芯和孢粉化石分析等,認為牛莊窪陷髮育于原沙三下亞段上下兩套油頁巖之中的砂體應屬于沙三中亞段低位體繫域,為水下遲積扇和深水濁積扇;併闡明瞭其沉積分佈特徵,且進一步運用層序地層學原理研究認為研究區低位域砂體沉積相組閤-層序及體繫域疊置模式為低水位深水濁積扇-湖平上升初期的低水位水下遲積扇-後期的湖侵水道。
의거록정、측정、암심화포분화석분석등,인위우장와함발육우원사삼하아단상하량투유혈암지중적사체응속우사삼중아단저위체계역,위수하충적선화심수탁적선;병천명료기침적분포특정,차진일보운용층서지층학원리연구인위연구구저위역사체침적상조합-층서급체계역첩치모식위저수위심수탁적선-호평상승초기적저수위수하충적선-후기적호침수도。
By analyzing of well drilling,well logging,core and cryptogam fossils data,the sand bodies previously classified to the middle of two sets of oil-bearing shale in the lower Es3 should be classified to low-stand system tract(LST) in the middle Es3,which is deposited in underwater fluvial and deep-water turbidite fan phases.The depositional and distributive characteristics of LST in middle Es3 indicated that the sand deposition-sequence and system tract overlay mode are from low-water-level deep-water turbidite fan to low-water-level alluvial fan in earlier lake-level-rise stage,and to later transgressive waterways.