地质通报2024，Vol.43Issue(5)：712-725,14.DOI:10.12097/gbc.2022.12.015
关中盆地新近系蓝田-灞河组热储层物性及渗流特征研究
Physical properties and percolation characteristics of Neogene Lantian-Bahe Formation thermal reservoir in Guanzhong Basin
摘要
Abstract
Guanzhong Basin is rich in geothermal resources,and its development and utilization will help to adjust the energy structure,reduce haze and improve the environment.The Neogene Lantian-Bahe Formation is the main stratum exploited at present.It is of great significance for effective development and reinjection of geothermal energy to clarify reservoir physical properties and seepage mechanism.Through core data and logging data,combined with mercury injection,casting thin section,nuclear magnetic resonance and other related testing methods,the physical property,pore structure and seepage characteristics of the Neogene Lantian-Bahe Formation in the Weihe Basin are analyzed in detail.The results show that:①The porosity in the plane of Lantian Bahe Formation is 7%～30%,with an average of 15%;permeability changes greatly,0.05～5689 mD,generally more than 30 mD.②The pores of Lantian-Bahe Formation are mainly primary intergranular pores and intergranular residual pores,with a small amount of microcracks and feldspar dissolution pores can be seen locally.The pore throat distribution is relatively uniform,mainly between 10 and 16 μm.The contribution value of permeability is high.The water yield can reach 80 m3/h,and the unit water inflow of sandstone with unit thickness can reach 0.0035 m3/(h·m2)with good water yield and seepage characteristics.③The reservoir type of Lantian-Bahe Formation belongs to Class Ⅱreservoir,which is comprehensively evaluated as high porosity permeable layer,and is the most favorable geothermal development interval.关键词
热储层/孔隙结构/渗流/蓝田-灞河组/地热资源/关中盆地Key words
thermal reservoir/pore structure/seepage/Lantian-Bahe Formation/geothermal resources/Guanzhong Basin分类
天文与地球科学引用本文复制引用
张莹,任战利,兰华平,祁凯,邢光远,夏岩..关中盆地新近系蓝田-灞河组热储层物性及渗流特征研究[J].地质通报,2024,43(5):712-725,14.基金项目
国家重点研发计划《未固结砂岩热储层保护与增效钻完井技术及材料》专题《不同地区典型未固结砂岩热储层特征及评价》(编号:2019YFB1504201-01)、长庆油田分公司勘探开发研究院合作项目《关中盆地地热资源调查及开发技术政策研究》 （编号:2019YFB1504201-01）
