河北地质大学学报2025，Vol.48Issue(2)：59-66,8.DOI:10.13937/j.cnki.hbdzdxxb.2025.02.007
靖边油田S井区长6段致密砂岩储层分类评价
Classification and Evaluation of Chang 6 Member Tight Sandstone Reservoir in S Well Area of Jingbian Oilfield
摘要
Abstract
The Chang 6 formation in the S well area of Jingbian Oilfield has dense reservoir,complex pore structure and difficult production decline in the later stage.Therefore,in this paper,the petrological and physical properties and pore structure of Chang 6 reservoir were studied by means of casting thin section,scanning electron microscope and high-pressure mercury injection analysis and testing combined with logging and oil test data.The results show that the lithology of the Chang 6 reservoir in the study area is mainly composed of medium-fine lithic feldspar sandstone and feldspar sandstone.The reservoir space is dominated by intergranular pores and secondary dissolved pores,and the correlation between pores and permeability is poor.Taking the porosity of 8.5%and the permeability of 0.2×10-3 μm2 as the lower limit of physical properties,combined with the previous classification criteria of tight sandstone reservoirs,the Chang 6 reservoir in S well area is divided into three categories:Ⅱb(good),Ⅲa(medium)and Ⅲb(poor).It provides a theoretical basis for the next step of oil and gas exploration and development strategy adjustment in the study area.关键词
靖边油田/致密砂岩储层/长 6 段/储层分类Key words
Jingbian Oilfield/tight sandstone reservoir/Chang 6 member/reservoir classification分类
能源科技引用本文复制引用
张文,张凤奇,孙越,郭圆圆,杜轩,冀昊宇,茹荣..靖边油田S井区长6段致密砂岩储层分类评价[J].河北地质大学学报,2025,48(2):59-66,8.基金项目
陕西省自然科学基础研究计划项目(2017JM4004) （2017JM4004）
西安石油大学创新与实践能力培养(YCS23213069) （YCS23213069）
