GeoReveal MRIL-P核磁解谱技术在低孔渗储层评价中的应用  

Application of the GeoReveal MRIL-P T2 spectrum inversion method to the evaluation of low porosity & permeability reservoirs

作　　者：罗利[1] 王勇军[1] 杨嘉[1] 谢刚[1] 刘文龙[1] 

机构地区：[1]川庆钻探工程有限公司测井公司

出　　处：《天然气工业》2011年第2期59-62,126,共4页Natural Gas Industry

摘　　要：从MRIL-P核磁共振测井仪器硬件优势出发,深入阐述了MRIL-P核磁T2解谱3个最核心的问题——解谱目标函数的确立、解向量的非负处理以及正则化方法的选择。在对MRIL-P型核磁解谱技术方法研究的基础上,展示了不同信噪比、不同岩性解谱的效果。JLS构造下侏罗统珍珠冲组砾岩储层具有岩性复杂、储集空间类型多样、低孔渗等特点,准确求取地层孔隙度是测井解释评价难点之一,结合MRIL-P型核磁共振解谱方法研究成果,提出采用求取最优正则化因子的方法来进行处理。处理结果证实MRIL-P型核磁共振测井适用于低孔渗储层孔隙度测井需求。Beginning with an introduction of the hardware advantages of Magnetic Resonance Imaging Logging Prime(MRIL-P) Tool,this paper discusses three core issues of MRIL-P T2 spectrum inversion,namely the establishment of objective function,non-negative constraints of solution-vector and the selection of appropriate regularization method.Based on a study of MRIL-P T2 spectrum inversion technology,we discuss the effects of spectrum inversion of different lithologies at different SNRs.The conglomerate reservoirs in the Lower Jurassic Zhenzhuchong Formation of JLS structure are characterized by complex lithology,multiple types of reservoir space,low porosity and low permeability,challenging the accurate calculation of logging porosity.Based on the research of MRIL-P T2 spectrum inversion,we present a method of optimizing regularization parameters.The processing results show that MRIL-P is capable of calculating accurate porosity of low permeability & porosity reservoirs.

关 键 词：GeoReveal解释平台 核磁测井 解谱 约束法 最优化 准则 低渗透储集层 

分 类 号：TE155[石油与天然气工程—油气勘探]