一种分岩相的酸性火山岩储层流体识别方法  

A LITHOFACIES METHOD OF THE ACIDIC VOLCANIC ROCK RESERVOIR FLUID IDENTIFICATION

作　　者：熊庆利[1] 李洪娟[1] 覃豪[1] 

机构地区：[1]大庆油田公司勘探开发研究院

出　　处：《国外测井技术》2014年第3期23-26,3-4,共4页World Well Logging Technology

基　　金：国家重点基础研究发展计划"973"项目(2009CB219307)资助

摘　　要：酸性火山岩中矿物类型多样,孔隙结构复杂,常规的中子-密度测井曲线交会不能反映储层的含气性,电阻率的高低总体反映流体性质的变化,但是气水同层识别精度低。本文在天然气的测井响应特征分析基础上,应用三孔隙度组合、横纵波时差比值、核磁共振及综合参数识别火山岩储层的含气性;通过分析不同岩相储层的电性特征,表明不同岩相的电阻率存在较大差异;在此基础上,采用先分岩相、再识别储层含气性、最后两者结合的方法,建立研究区流体性质识别标准。应用表明,该方法经徐深气田49口开69个层试气验证,识别准确率达89.1%,提高了近12个百分点。Conventional neutron-density logging cross-plots can not reflect the gas-bearing properties of the reservoir because of various types of minerals and complexity of pore structure. The resistivity reflects the change of fluid properties, but the precision is low for gas water layers. Based on the analysis ofcharacteristics of natural gas logging response, porosity combination,the ratio of transverse wave and longitudinal wave,nuclear magnetic resonance and integrated parameters are used to identify gas-bearing features. Through the analysis of electrical characteristics of different lithofacies reservoirs, it is indicated that there is significant difference in different facies resistivity. So the lithofacies is first distinguished, and then gas bearing reservoirs are identified, finally both of them are combined to establish the fluid property identification standards. Applications showed that this method is verified by gas testing of 69layers of 49 wells in Xushen gas field.Its accuracy is 89.1%,which has increased nearly12 percent.

关 键 词：流体识别 爆发相 溢流相 孔隙度组合 横纵波时差比 核磁共振 综合参数 

分 类 号：P588.14[天文地球—岩石学]