摘要
为了搞清Y断陷营城组火山机构特征及演化规律,在区域沉积背景分析基础上,利用录井、测井及地震资料,建立了营城组火山岩旋回格架,并对火山岩演化规律进行了深入研究.将营城组划分为三大旋回,并细分为六个期次,并利用趋势面分析技术,采用井点定相、相干找型、剩余构造划界的方法,完成营城组六个期次的火山口识别,火山口规模在各个旋回时期呈弱-变强-减弱的分布规律.三大旋回火山喷发具有迁移叠置、多厚度中心的特点,不同期次火山岩喷发特征差异较大,主要表现在火山口面积、火山机构幅值、火山口分布范围以及活动强度方面.并以期次五为例,总结了火山岩相平面特征,主要发育火山口、近源相组、远源相组合火山沉积相四种类型,其中,火山口相是下一步天然气勘探的重点.
In order to find out the volcanic apparatus feature and evolution rule of Y fault depression in Yingcheng Group,based on the analysis of regional sedimentary background,this paper use logging,well logging and seimic date,setting up the cycle framework in Yingcheng group and the evolution law of volcanic rock is deeply studied.Using the well Identifing facies,coherent finding type,the remaining structure deciding boundary method,the Yingcheng group will be divided into three cycles,and subdivided into six times of stage,by using trend surface analysis technique,completing recognition crater for six times of stage and the distribution law of the crater＇s scale in each cycle period is weakstronger-weakened.Three cycle of volcanic eruption has the characteristics of displaced superposition and more thickness of the center,volcanic in varied epochs eruptions feature differences,mainly manifested in the crater area,amplitude of volcanic,range of crater distribution and activity density of crater.Take the cycle five as the example,summarizes the plane characteristics of volcanic lithofacies,the main volcanic,four types of near-source combination,long-source combination volcanic sedimentary facies,among them,the crater facies is the key point of further natural gas exploration.
出处
《地球物理学进展》
CSCD
北大核心
2017年第4期1673-1678,共6页
Progress in Geophysics
基金
中国石油科技创新基金项目(2016D-5007-0212)
提高采收率原理与技术创新团队(2009td08)联合资助
关键词
营城组
火山机构
相干体
火山口
天然气
Yingcheng group
volcanic apparatus
coherence cube
crater
gas
