【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。更多还原

【Abstract】 The tight gas reservoir in east Sulige area is affected by different polyphase deposition,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.更多还原