地质科技情报2018，Vol.37Issue(1)：122-127,6.DOI:10.19509/j.cnki.dzkq.2018.0116
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 Es4 of Northern Minfeng Zone in Dongying Sag
摘要
Abstract
The classification of scdimentary 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Key words
Dongying Sag/northern Minfeng zone/the upper Es4/glutenite body/frequency-division interpretation/nearshore subaqueous fan分类
天文与地球科学引用本文复制引用
邵绪鹏,张立强,靳久强,张立宽..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[J].地质科技情报,2018,37(1):122-127,6.基金项目
国家科技重大专项“大型油气田及煤层气开发”(2011ZX05008-004) （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) （2011CB201105）
