Y断陷营城组火山机构特征及演化

发布时间：2018-05-31 03:36

本文选题：营城组 + 火山机构　；参考：《地球物理学进展》2017年04期

【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.
[Abstract]:In order to find out the characteristics of volcanic mechanism and evolution law of Yingcheng formation in Y fault depression, based on the analysis of regional sedimentary background, using logging, logging and seismic data, the volcanic cycle framework of Yingcheng formation is established. The evolution law of volcanic rocks is also studied. The Yingcheng formation is divided into three cycles and subdivided into six periods. By using trend surface analysis technique, the crater identification of six periods of Yingcheng formation is completed by using the methods of well location, coherence finding and residual tectonic demarcation. The scale of crater is weakly-variable-weakened in each cycle period. The three major cyclic volcanic eruptions are characterized by superposition of migration and multiple thickness centers. The characteristics of subvolcanic eruptions are quite different in different periods, mainly in the area of crater, the amplitude of volcanic body, the distribution range of crater and the intensity of activity. Four types of volcanic sedimentary facies of volcanic facies are summarized, which are mainly developed crater, near-source facies and distant facies assemblage. Among them, crater facies is the focus of gas exploration in the next step.
【作者单位】：东北石油大学石油工程学院;
【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
【分类号】：P618.13

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