致密储层测井系列优化评何——以苏里格气田东区为例  

Optimized Evaluation of Tight Reservoirs with Logging Series

作　　者：宋子齐[1] 刘之的[2] 庞玉东[1] 田新[1] 张景皓[2] 

机构地区：[1]西安石油大学石油工程学院 [2]西安石油大学地球科学与工程学院

出　　处：《低渗透油气田》2013年第3期31-38,86,共9页

基　　金：中国石油天然气股份有限公司科学研究与技术开发项目“致密气藏测井采集处理与评价技术研究”（NO.2010E-2304）;国家自然科学基金项目“变形介质复杂储层应力敏感性的岩石流变学机理及动态模型”（NO.51104119）资助.

摘　　要：针对苏里格气田东区致密砂岩储层测井响应复杂的特点．利用致密储层类型识别、储层渗透率特性和含气性质的分析，对该区常规使用的11种测井方法进行了优化评价研究。通过对区内40多口井500多个不同类型的致密储层的评价效果的统计，提出了在致密储层气田中选择测井技术系列的原则。其中岩性系列以自然电位测井、自然伽玛能谱测井效果为好，井径测井为较好，自然伽玛测井及有效光电吸收截面指数测井居中；孔隙度系列以密度测井、声波时差测井效果为好，中子孔隙度测井较差；电阻率系列以高分辨率阵列感应测井效果为好，高分辨率阵列侧向测井为较好，双侧向测井居中。特别是深入地分析了致密储层舍气层段气体最大渗透率及其”无孔不入”的测井响应特点，阐明了不同程度舍气层段测井响应曲线的异常差异的特征，提出密度减小和声波时差增大是致密储层评价最为敏感的含气信息，自然电位和自然伽玛能谱减小幅度是致密储层评价最为有效的含气信息，从而阐明了致密储层勘探开发中的各种系列测井方法的作用和效果，有效地提升致密储层测井定性识别和定量评价能力。In the light of characteristics of the complex logging responses of tight sandstone reservoirs in Eastern Sulige gasfield, by using tight reservoir of 11 kinds of conventional logging methods used the area are conducted in the paper.Throught statistics of the evaluation effect of over 500 different types of tight reservoirs in more than 40wells in the region,the authors proposed principles of selecting the logging technology series for tight gas reservoirs.Where for lithology series,spontaneous potential logging and natural gamma ray spectrometry logging effects are fine,and caliper logging is good,while natural gamma ray logging and effective photoelectric absorption cross-section index logging is intermediate;for porosity series,density log and acoustic logging effects are fine,but neutron porosity log is poor,for resistivity series,high resolution array induction logging effects is fine,and high-resolution array lateral logging is good,while bilateral logging is intermediate.In particular,the authors deeply analyze the maximum gas permeability of the gas -bearing section of tight gas reservoirs and ＂pervasive＂logging response characteristics,and expound the characteristics of abnormal differences betweenlog response curves of various degree gas-bearing intervals.The authors put forward that density decrease and increased acoustic time are the most sensitive gas-bearing information for tight reservoir evaluation,and reduced amplitudes of spontaneous potential and natural gamma ray energy spectrum are the most efficient gas-bearing information for tight reservoir evaluation,thus clarify the role and effectiveness of various series of logging methods in tight reservoir exploration and development,and effectively enhance the qualitative identification and quantitative evaluation capability of logging in tight reservoirs.

关 键 词：致密储层 测井系列 测井响应曲线异常差异 最为敏感及最为有效的含气信息 提升测井评价能力 

分 类 号：P618.13[天文地球—矿床学]