安塞油田坪桥区长6储层微观孔喉结构特征研究  

Study on microscopic pore throat structure of Chang 6 reservoir in Pingqiao area of Ansai oilfield

作　　者：张波波[1] Zhang Bobo(Xingzichuan Oil Production Plant of Yanchang Oilfield Company Limited By Shares,Yan’an 717400)

机构地区：[1]延长油田股份有限公司杏子川采油厂,陕西延安717400

出　　处：《石化技术》2024年第8期230-232,共3页Petrochemical Industry Technology

摘　　要：针对坪桥区三叠系延长组长6储层,进行了岩心铸体薄片、扫描电镜、压汞等方法,系统研究了长6储层岩石学特征、孔隙类型、孔喉结构对储层物性的影响。区域长6储层主要发育溶蚀粒间孔,其次残余部分原生粒间孔,溶蚀粒间孔以浊沸石溶孔最为发育,面孔率主要分布为0.5%~15.5%,平均4.54%。排驱压力一般在0.09~7.29 MPa之间,平均1.24 MPa,表现为属于中等排驱压力。孔喉结构是影响储层物性的关键性因素,孔喉均值大小与储层的储集性能具有正相关性,即孔喉均值越大,储层储集空间就越大,有效孔隙度值就越大,孔喉均质与渗透率也呈正相关。According to the Chang 6 reservoir of the Triassic Yanchang Formation in Pingqiao area,the methods of core casting slice,scanning electron microscope and mercury injection were carried out,the effects of petrological characteristics,pore types and pore throat structure on reservoir physical properties of Chang 6 reservoir are systematically studied.The intergranular pores are mainly developed in Chang6 Reservoir,and the primary intergranular pores are in the second place.The intergranular pores are most developed in laumonite.The main distribution of the pore ratio is 0.5%~15.5%,with an average of 4.54%.The displacement pressure is generally between 0.09 Mpa and 7.29 Mpa with an average of 1.24 MPa,which belongs to medium displacement pressure.The pore throat structure is the key factor that affects the reservoir physical property,the pore throat mean value has the positive correlation with the reservoir performance,that is,the bigger the pore throat mean value is,the bigger the reservoir space is,and the bigger the effective porosity is,the pore-throat homogenization was also positively correlated with permeability.

关 键 词：安塞油田 长6储层 孔喉结构 储层特征 

分 类 号：P618.13[天文地球—矿床学]