成都—简阳地区二叠系火成岩储层预测  

Prediction of Permian igneous rock reservoirs in Chengdu-Jianyang area

作　　者：郭波 耿玮 陈海清 李鹏 贾能辉 王琳 GUO Bo;GENG Wei;CHEN Haiqing;LI Peng;JIA Nenghui;Wang Lin(Geological Research Center,BGP,CNPC,Zhuozhou,Hebei 072751,China)

机构地区：[1]东方地球物理公司研究院地质研究中心,河北涿州072751

出　　处：《石油地球物理勘探》2022年第S01期104-109,11,共7页Oil Geophysical Prospecting

摘　　要：成都—简阳地区二叠系火成岩岩性、岩相变化快,储层以爆发相的火山碎屑岩、碎屑熔岩为主。火成岩的多期喷发和侵入叠置,导致纵、横向均存在较强非均质性,为火山机构识别特别是爆发相储层识别带来困难。为此,通过正演模拟,分析本区火山机构内部结构特征,建立早期集中喷发形成储层、晚期岩浆侵入改造储层的火成岩演化模式。按照火山通道—火山机构外形—近、远口相—爆发相的顺序逐级识别火山机构。在此基础上,借助相控融合反演技术,刻画爆发相储层展布规律,形成一套适用于多期次火成岩储层预测的技术流程,以期提高高产井位钻探成功率。The lithology and lithofacies of the Permian igneous rocks in the Chengdu-Jianyang area change rapidly,and the reservoirs are dominated by volcanic clastic rocks and clastic lava of explosive facies.The multistage eruption and intrusion superposition of igneous rocks lead to strong heterogeneity in both vertical and horizontal directions,which makes it difficult to identify volcanic edifices and reservoirs of explosive facies.Through forward modeling,this paper analyzes the internal structural characteristics of the volcanic edifices in this area and establishes an igneous rock evolution model featuring reservoirs formed by an early concentrated eruption and transformed by a late magmatic intrusion.The volcanic edifices are identified according to the sequence of volcanic channels-volcanic edifice shape-near and far crater facies-explosive facies.On this basis,with the help of facies-controlled fusion inversion technology,the distribution law of reservoirs of explosive facies is described,and a set of technical flows for multi-stage reservoir prediction of igneous rocks is formed,so as to improve the drilling success rate of high-yield wells in this area.

关 键 词：多期次 正演模拟 火成岩储层 晚期岩浆侵入 相控融合反演 

分 类 号：P631[天文地球—地质矿产勘探]