东北石油大学学报2025，Vol.49Issue(6)：46-56,84,12.DOI:10.3969/j.issn.2095-4107.2025.06.004
鄂尔多斯盆地神木气田本溪组致密砂岩储层分类评价及南北部差异性
Classification evaluation and north-south differences of tight sandstone reservoirs in Benxi Formation of Shenmu Gas Field,Ordos Basin
摘要
Abstract
The Benxi Formation reservoirs in the Ordos Basin exhibit complex characteristics that con-strain efficient gas reservoir development.Methods including core observation,X-ray diffraction analy-sis,thin section identification,scanning electron microscopy,and high-pressure mercury injection ex-periments were employed to study the reservoir characteristics of the Benxi Formation in Shenmu Gas Field.This enabled establishing a comprehensive reservoir evaluation system,predicting favorable res-ervoir distributions,and clarifying north-south reservoir differences.Results indicate:the reservoir li-thology is predominantly gray-dark gray quartz sandstone,with medium-coarse sandstone in the south and medium-fine sandstone in the north;pore types mainly include intergranular pores,dissolution pores,intercristal line pores,and microfractures,with the south dominated by intergranular and disso-lution pores while the north primarily shows dissolution pores,demonstrating gradually increasing pore-plane ratio and improving physical properties from north to south;pore-throat structures are mainly me-dium-large to medium pores with coarse throats,showing poor connectivity and overall low-porosity,low-permeability tight sandstone characteristics;compaction-pressure dissolution and cementation are widely developed,with strong cementation in northern reservoirs and predominant dissolution in south-ern reservoirs,placing the reservoirs in middle diagenetic stage B to late diagenetic stage;reservoirs can be classified into types Ⅰ-Ⅲ,with types Ⅰ and Ⅱ being high-quality reservoirs covering 786 km of fa-vorable areas,and type Ⅰ reservoirs mainly concentrated in the southern region;southern reservoirs outperform northern ones in physical parameters,pore structure,and storage capacity.These results provide geological basis for efficient development of the Benxi Formation in Shenmu Gas Field.关键词
储层特征/储层分类/储层差异性/本溪组/神木气田/鄂尔多斯盆地Key words
reservoir characteristics/reservoir classification/reservoir differences/Benxi Formation/Shenmu Gas Field/Ordos Basin分类
能源科技引用本文复制引用
张博杰,黄有根,王一妃,路归一,汪淑洁,刘昌民..鄂尔多斯盆地神木气田本溪组致密砂岩储层分类评价及南北部差异性[J].东北石油大学学报,2025,49(6):46-56,84,12.基金项目
中国石油天然气股份有限公司攻关性应用性科技专项(2023ZZ18YJ04) （2023ZZ18YJ04）
中国石油天然气股份有限公司攻关性应用性科技专项(2023ZZ16YJ03) （2023ZZ16YJ03）
