东营凹陷民丰北带沙四上亚段砂砾岩体沉积相带边界划分  

Sedimentary Facies Boundary Division of Glutenite Bodies in the Upper Es_4 of Northern Minfeng Zone in Dongying Sag

作　　者：邵绪鹏 张立强[2] 靳久强[1] 张立宽[3] Shao Xupeng;Zhang Liqiang(Research Institute of Petroleum Exploration ga Jin Jiuqiang1 , Zhang Likuana Development, PetroChina, Beijing 100083,China;School of Geosciences, China University of Petroleum（East China）,Qingdao Shandong 266580, China;Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China)

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]中国石油大学(华东)地球科学与技术学院,山东青岛266580 [3]中国科学院地质与地球物理研究所,北京100029

出　　处：《地质科技情报》2018年第1期122-127,共6页Geological Science and Technology Information

基　　金：国家科技重大专项"大型油气田及煤层气开发"(2011ZX05008-004);国家"973"项目"中国典型叠合盆地油气形成富集与分布预测"(2011CB201105)

摘　　要：东营凹陷民丰北带地区深层砂砾岩体钻井数少,常规沉积相研究方法主观因素过多,加之常规地震属性技术无法准确刻画砂砾岩体沉积相边界,导致该地区沉积相边界划分存在分歧。在总结薄层调谐反射理论的基础上,以沉积学规律为指导,应用分频解释技术对东营凹陷民丰北带地区沙四上亚段发育的砂砾岩体的沉积相带进行了划分。结果表明:东营凹陷民丰北带砂砾岩体为近岸水下扇沉积成因,细分为近岸水下扇扇根、扇中和扇端3个亚相;砂砾岩体发育段在地震频谱上具有频陷特征,是薄层细粒沉积与厚层粗粒沉积的综合地震反映;低频振幅调谐体切片反映扇根沉积特征,中频振幅调谐体切片反映扇中沉积特征,高频振幅调谐体切片反映扇端沉积特征;横向上,砂砾岩体靠近陈南断层分布,由陈南断层向南依次为扇根、扇中、扇端亚相;纵向上,砂砾岩体向陈南断层方向呈退积式发育。该研究成果对岩电关系复杂、常规地震属性较难识别的少井区具有一定的指导意义。The classification of sedimentary facies boundaries in northern Minfeng zone,Dongying Sag has been in heated debate due to a small number of wells encountering deep glutenites,many subjective factors in the conventional sedimentary facies research methods,as well as the failure of traditional seismic attribute technology in accurately characterizing the sedimentary facies boundary.Based on the thin-bed tuning reflection theory and the law of sedimentology,this study classifies the sedimentary facies belt of glutenite bodies of the upper Es4 in northern Minfeng zone,Dongying Sag by the frequency-division interpretation technology.The study demonstrates that the sedimentary facies should be of nearshore subaqueous fan sedimentary origin,and can be further divided into three subfacies：the root fan,middle fan,and fan edge.Seismic frequency spectrum trap characteristics in the glutenite-developed strata are the comprehensive seismic reflection of thin-bed fine-grained sediments and thick-bed coarse-grained sediments.Sections of low,middle,and high frequency amplitude tuning cubes respectively reflect sedimentary characteristics of the root fan,middle fan,and fan edge.Horizontally,glutenite bodies are distributed near the Chennan fault,and the subfacies vary from the root fan and middle fan,to fan edge southwards.Vertically,the glutenite bodies present retrogradation development characteristics in the direction towards the Chennan fault.This study provides certain guidance for the areas with little amount of wells that are characterized by complex rock-electricity relation and difficult to be identified by conventional seismic attribute.

关 键 词：东营凹陷 民丰北带 沙四上亚段 砂砾岩体 分频解释 近岸水下扇 

分 类 号：P618.13[天文地球—矿床学]