苏里格东区致密气藏成岩储集相分类及其测井响应特征研究  

Tight Gas Reservoir Diagenetic Reservoir Facies Classification and Log Responses in East Sulige Area

作　　者：成志刚 宋子齐[1,2] 景成[3] 何羽飞 张亮[2] 段琼[3] 

机构地区：[1]中国石油集团测井有限公司油气评价中心,陕西西安710077 [2]西安石油大学石油工程学院,陕西西安710065 [3]中国石油大学石油工程学院,山东青岛266555

出　　处：《测井技术》2013年第2期154-161,共8页Well Logging Technology

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"致密气藏测井釆集处理与评价技术研究"(编号:2010E-2304);国家自然科学基金项目(NO.51104119)资助

摘　　要：针对苏里格东区致密气藏储层受多期不同类型沉积、成岩作用及构造等因素影响,成岩过程压实和胶结强烈,成岩阶段和作用复杂的特点,分析了该区盒8上、盒8下、山1、山2致密砂岩储层成岩过程孔隙演化的基本规律、岩性结构演变、参数变化及其孔隙组合、孔隙结构特征,在研究区划分出Ⅰ、Ⅱ、Ⅲ、Ⅳ类成岩储集相储层。Ⅰ、Ⅱ类成岩储集相成岩过程参数演化给出了相对较低压实、胶结和强溶蚀作用特征,反映储层处于有利的沉积、成岩相带,具有相对较好的岩性、物性和孔隙结构特征,成为该区致密气藏筛选相对优质储层的甜点。通过该区24口井目的层段致密气藏岩心鉴定分类成岩储集相测井响应统计分析,确定出不同系列测井曲线评价划分成岩储集相的响应特征及其分布范围,提出致密气藏评价划分十分有效及其相互匹配的含气信息。实例分析致密气藏不同成岩储集相测井曲线异常差异,利用Ⅰ、Ⅱ类成岩储集相在致密气藏储层测井评价中提供的含气信息,划分出不同类别致密气藏含气层段,有效提升了致密气藏成岩储集相分类测井定量评价能力。The tight gas reservoir in east bulige area is attected by Clltterent potypnase oeposmon, diagenesis and structural factor, so the compaction and cementation are intense, diagenesis is complicated during diagenetic process. Analyzed are the basis law of porosity changes and lithologic structure evolution, parameters, pore assemblage and pore configuration features during close sand diagenetic process of He 8-1, He 8-2, Shan 1 and Shan 2. And diagenetic reservoir facies are classified as I, II, III and IV types in this area. The parameter evolution of I, II diagenetic reservoir facies in diagenetic process indicates low compaction and cementation, strong denudation feature, which reflects that the reservoir is in the favorable sedimentary and diagenetic facies. So I, II diagenetic reservoir facies are the ＂dessert＂ which can be used to filter the relatively beneficial reservoirs for their relatively preferable lithologic character, physical property and pore configuration feature. Different series logging traces behaviour and distribution range of diagenetic reservoir facies can be determined through counting and analyzing the core assorting diagenetic reservoir facies log responses of the intended interval of 24 wells in this area.On this basis, an effective and reciprocal coupling gas information for evaluating and dividing a tight gas reservoir is presented. With the example, this paper analyzes abnormal logs differences of different diagenetic reservoir facies in the tight gas reservoir, and indicates the gas information got from the tight gas reservoir loggings of I, II diagenetic reservoir facies, determines and classifies gas bearing intervals of different tight gas reservoirs. So, through researching the capability of diagenetic reservoir facies classification, quantitative logging assessment could be effectively developed for the tight gas reservoir.

关 键 词：测井解释 致密气藏 成岩储集相 分类模式 成岩过程 测井响应 异常差异 

分 类 号：P631.84[天文地球—地质矿产勘探]