东濮凹陷文79断块沙二下亚段沉积环境粒度概率累积曲线特征  

Probability cumulative grain size curves of the lower E_(s2) in Wen 79 fault-block,Dongpu depression

作　　者：于涛[1,2] 张金亮[1,2] 张鹏辉[2] 范忠礼[1] 孙中强[1] 薛欢欢[1] 王梦琪[1] 

机构地区：[1]山东科技大学地球科学与工程学院,山东青岛266590 [2]北京师范大学资源学院,北京100875

出　　处：《中国科技论文》2015年第21期2523-2527,共5页China Sciencepaper

基　　金：高等学校博士学科点专项科研基金资助项目(20110003110014);山东省自然科学基金资助项目(ZR2014DP012)

摘　　要：研究粒度可以明确搬运介质的性质和能量,确定沉积物的搬运方式,为沉积相划分提供依据。在岩心观察描述和沉积相分析的基础上,利用取心井粒度分析资料对东濮凹陷文留地区文79断块沙二下亚段砂岩的粒度概率累积曲线进行研究。结果表明,该研究区主要沉积环境粒度概率累积曲线特征为:分流河道微相有典型的两段式或三段式和"高斜一跳一悬夹过渡式"的组合特征;近河道漫溢微相有两段式和"两跳一悬夹过渡式"以及"一跳一悬夹过渡式";远河道漫溢微相有简单一段式和"低斜多段式"及"细粒高悬加过渡式"。Studying grain size can clearly define the nature and energy of the transportation medium, determine the mode of sedi- ment transportation, and thus provide basis for the division of sedimentary facies. On the basis of drill core observation, and ana- lyses of facies and grain size, features of probability cumulative grain size curves of the lower Es2 in Wen 79 fault-block of Wenliu district in Dongpu Depression are summarized. Results show distributary channel microfacies is of typical bb or tri-segmental pat- tern, and high slope 1 bouncing population-lsuspension-transitional zone pattern; proximal overbank microfacies tends to be hi- segmental pattern and 2 bouncing populations-1 suspension-transitional zone pattern and 1 bouncing population-1 suspension-tran- sitional zone patterm distal overbank micro{acies shows a single segmental pattern and low slope multi-segments pattern and ex- cessive suspension population pattern.

关 键 词：地质学 文79块 沙二下亚段 沉积相 沉积环境 碎屑岩 粒度概率累积曲线 东濮凹陷 

分 类 号：P618.13[天文地球—矿床学]