摘要
在日益被重视的火山岩油气勘探中,由于主观和客观的原因,对火山岩油气藏的岩性存在认识不足,很大程度上限制了火山岩油气藏的勘探和开发。在分析造成这种认识不足的原因基础上,简化了储层分析中的火山岩分类方案,探讨了简化后的火山岩类型在常规测井上的响应特征。认为对火山岩岩性反映较好的常规测井曲线类型有:AC,DEN,RT(RXO,RS,COND),GR和CAL;一般由基性火山岩到酸性火山岩,表现为伽马值的增高;由火山碎屑岩到熔岩,表现为电阻率和密度的增高和声波时差的降低;在熔岩段内,测井曲线齿化代表了熔岩的破碎,反映于声波时差的增高和密度的降低及电阻率的降低。综合多个油田的实际资料,建立了火山岩的测井识别图版和标准。该分析方法和思路及提供的测井识别图版,对于火山岩油气藏的基础研究具有指导意义。
In the process of volcanic oil and gas exploration,because of subjective and objective reasons,there existed insufficient lithologic understanding of volcanic oil and gas reservoirs,which constrained their exploration and development.On the basis of analysis,the classification of volcanic rocks was simplified for reservoir analysis,the response characteristics of simplified volcanic types used in conventional logging were discussed.It was considered that the types of conventional logging curves with better volcanic lithology included AC,DEN,RT(RXO,RS,COND),GR and CAL.Generally the volcanic rocks and acidic rocks presented high gamma ray,while volcanic clastic rocks and lava presented high resistivity,high density and low interval transit time.In lava zones,logging curve unsmoothing presented lava break,it reflected high interval transit time and low density and low resistivity.By integrating data from oilfields,chartboard and criterion are established for logging recognition.The analytical method,idea and chartboard are of great significance for the basic study of volcanic reservoirs.
出处
《石油天然气学报》
CAS
CSCD
北大核心
2007年第6期33-37,共5页
Journal of Oil and Gas Technology
关键词
火山岩
油气藏
储集层
岩性识别
测井资料
volcanic rock
oil and gas pool
reservoir
lithologic recognition
logging data
