摘要
为了通过粒度来明确搬运介质的性质和能量,厘定沉积物的搬运方式,为沉积微相的划分提供证据,基于岩心观察和沉积相分析,对鄂尔多斯盆地油房庄地区长7油层组的三角洲前缘及滑塌浊积岩的粒度特征进行了分析。结果表明,该地区主要沉积环境的粒度概率累积曲线特征为:水下分流河道微相主要为典型两段式、三段式、两段夹过渡式及多段式的组合;水下天然堤微相有一段式和细粒高悬式;河口沙坝微相为高斜一跳一悬夹过渡式及两跳一悬夹过渡式;沙席微相主要为两段式;滑塌浊积岩主要为上拱弧形、低斜多段式、一段式和低斜两段式。C-M图以QR段(递变悬浮沉积)为主,整体反映河流(三角洲)及浊积岩的沉积特点。
The study of grain size can clearly define the nature and energy of the transportation medium, determine the mode of sediment transportation, and thus provide basis for the division of sedimentary facies. On the basis of drill core observation, faci-es analysis and grain size analysis of delta front and fluxoturbidite of Chang7 reservoir in Youfangzhuagn area in Oedos Basin are summarized. The results show that the features of probability cumulative grain size curves are as following： the distributary chan-nels have the characteristics of “typical bi-segment pattern”,“ tri-segmental pattern” ,“high slope 1 bouncing population-1 sus-pension-transitional zone pattern” and “multi-segments pattern”. The subaqueous levees are of “one segment pattern” and “sus-pension populaion”. The mouth bars have “high slope 1 bouncing population-1 suspension-transitional zone pattern ’’and “ 2 bouncing populations-1 suspension-transitional zone pattern”. The sand sheets are mainly for “bi-segment pattern” and the fluxo- turbidites tend to be “uphill arched arc”,“low slope multi-segments pattern”,“one segment pattern” and “low slope bi-segment pattern”. The C-M pattern mainly reflects the characteristics of river （delta） and fluxoturbidites which mainly has the QR sege- ment.
作者
于涛
于江涛
孟宁宁
杜敬国
姬安召
YU Tao YU Jiangtao MENG Ningning DU Jingguo JI Anzhao(School of Geophysics and Information Technology , China University of Geosciences,Beijing 100083, China College of Mining Engineering,North China University of Science and Technology,Tangshan, Hebei 063009？ China Remaining Oil-EOR Laboratory,North China University of Science and Technology,Tangshan,Hebei 063009, China School of Knergy Engineering y Longdong University, Qingyang, Gansu 745000, China)
出处
《中国科技论文》
北大核心
2017年第3期255-262,共8页
China Sciencepaper
基金
甘肃省科技计划资助项目(1506RJYM324)
河北省教育厅资助科研项目(BJ2016040)
河北省科技计划资助项目(15273616)
关键词
沉积环境
碎屑岩
粒度特征
鄂尔多斯盆地
油房庄
sedimentary environment
clastic rocks
grain-size characteristics
Oedos basin
Youfangzhuang area
