川东南涪陵地区上二叠统长兴组生物礁特征及分布规律  

DISTRIBUTION OF THE ORGANIC REEFS IN THE UPPER PERMIAN CHANGXING FORMATION IN FULING AREA OF NORTHEASTERN SICHUAN

作　　者：张新[1] 梁子锐[1] 汪建辉[1] 

机构地区：[1]中国石油化工股份有限公司勘探南方分公司研究院,成都610041

出　　处：《海洋地质前沿》2012年第4期23-29,共7页Marine Geology Frontiers

基　　金：中石化油田勘探开发事业部勘探先导项目"川东南涪陵地区区带评价与目标优选"

摘　　要：涪陵地区位于四川盆地长兴组台地边缘沉积相带上,具有发育礁滩储层的沉积背景。地震剖面上显示有礁滩反射异常体,针对该地区生物礁滩储层的xl1井获得工业天然气流,通过二、三维地震资料精细研究,并结合钻井资料建立该地区沉积相模式,总结出长兴组生物礁滩具有横向迁移和纵向加积两大沉积特征。通过井震响应分析、模型正演以及与元坝生物礁地震反射特征对比分析,归纳总结了涪陵地区生物礁滩的地震响应模式。最后结合地震相、沉积相以及钻井资料总结出该地区生物礁滩分布规律。The Changxing Formation, in which organic reefs are well developed, is widely distributed in the Fuling area of the Sichuan Basin. Commercial gas flow has been discovered from the organic reef reservoir in the drilling well of Xinglong No. 1 of this region. This paper established a facies model based on 2D and 3D seismic data in combination with the well drilling data, and found that the Chan- gxing organic reefs are characterized by lateral migration and vertical accretion. Through the analysis of the seismic-well response, forward modeling and the study of seismic reflection of the Yuanba reef, the seismic response pattern to reefs in Fuling area were concluded. The distribution pattern of organ- ic reefs was established upon integration of seismic facies, sedimentary facies and well drilling data.

关 键 词：涪陵地区 生物礁 地震特征 沉积特征 模型正演 

分 类 号：P539.1[天文地球—古生物学与地层学]