基于序贯指示模拟方法的火山岩储层岩性及孔隙度模拟  

Simulation of Lithology and Porosity of Volcanic Rock Reservoir Based on Sequential Indicator Simulation

作　　者：王英伟[1] 张建民[2] 王满[3] 潘保芝[1] 邢艳娟[2] 石丹红[2] 

机构地区：[1]吉林大学地球探测科学与技术学院。长春130026 [2]大庆钻探工程公司测井二公司,吉林松原138000 [3]吉林大学地球科学学院,长春130061

出　　处：《吉林大学学报（地球科学版）》2010年第2期455-460,共6页Journal of Jilin University：Earth Science Edition

基　　金：中国石油化工股份有限公司科技开发项目(G0800-06-ZS-321);国家科技重大专项(2008ZX05009-001-01)

摘　　要：火山岩组成和结构的复杂性使岩性确定、储层参数计算及其空间分布规律描述都较为困难。以长岭凹陷某区块营城组顶部火山岩为研究对象,以序贯指示模拟为手段,通过单井岩性识别和孔隙度计算及地质变量变异函数中多种参数的选取,对研究区火山岩储层的岩性和孔隙度分布进行三维模拟。研究区发育流纹岩和凝灰岩两种火山岩:流纹岩的孔隙度较小,且变异性较小;凝灰岩的孔隙度偏大,且变异性较大。模拟结果表明:孔隙度的大小及变异性与其构造位置有相关性;位于构造隆起与凹陷处的火山岩孔隙度偏小而变异性较大,而构造斜坡带处火山岩孔隙度偏大,变异性较小。Because of the complexity of the composition and structure of volcanic rocks,it is difficult for lithology identification,reservoir parameters calculation and spatial distribution description.Taking the volcanic rocks in the top of Yingcheng Formation,Changling sag,for studying object,by means of the sequential indicator simulation,and making use of the lithology identification and porosity calculation in each single well,as well as selection of various parameters of variogram,the 3D simulation about the distribution of lithology and porosity in the study area was carried out.Both of the tuff and rhyolite were developed in this area,and as for rhyolite,both of the porosity and its variation coefficients are smaller;in other hand,as for the tuff,both of them were much bigger.The simulation results showed that the porosity and its variation coefficient are associated with the structural location.While the volcanic rock locate at uplift and hollow zone,the porosity will lower than the volcanic rock locate at ramp region,but its variation coefficient will be higher.

关 键 词：火山岩 随机模拟 序贯指示模拟 岩性识别 孔隙度 

分 类 号：P631.8[天文地球—地质矿产勘探]