靖安油田大路沟地区长6低渗储层孔喉结构特征  

Characteristics of pore throat structure of Chang 6 low permeability reservoir in Dalugou area of Jingan Oilfield

作　　者：宋鹏 谢启超[1,2] 杨卫国 王楠[1,2] 斯尚华 Song peng;Xie qichao;Yang weiguo;Wang nan;Si shanghua(Exploration and Development Research Institute of PetroChina Changqing Oilfield Company,Xi'an 710000;National Engineering Laboratory for Exploration and Development of Low Permeability Oil and Gas Fields,Xi'an 710000;School of Earth Sciences and Engineering,Xian shiyou university,Xi'an 710065)

机构地区：[1]中国石油长庆油田分公司勘探开发研究院,陕西西安710000 [2]低渗透油气田勘探开发国家工程实验室,陕西西安710000 [3]西安石油大学地球科学与工程学院,陕西西安710065

出　　处：《石化技术》2022年第9期162-164,共3页Petrochemical Industry Technology

摘　　要：根据岩石薄片、压汞、扫描电镜等资料,对大路沟地区长6储层孔喉特征进行了研究。研究表明,该区长6储层孔隙度平均值为10.88%,渗透率平均值为0.90×10^(-3)μm^(2),属低孔低渗储层。储层孔隙类型复杂多样,主要以残余粒间孔和溶蚀孔为主。储层平均分选系数为2.36,平均变异系数为0.20,平均中值半径为0.20um,储层孔喉分布不均匀,孔喉半径较小。根据压汞参数中的排驱压力、中值半径、退汞效率及汞饱和度等,将该区长6储层孔隙结构分为Ⅰ类、Ⅱ类、Ⅲ类,长6储层以Ⅱ类孔隙结构为主。According to the data of rock thin section,mercury injection and scanning electron microscope,the pore throat characteristics of Chang 6 reservoir in Dalugou area are studied.The research shows that the average porosity of Chang 6 reservoir in this area is 10.88%and the average permeability is 0.90×10^(-3 )μm^(2),belonging to low porosity and low permeability reservoir.The types of reservoir pores are complex and diverse,mainly including residual intergranular pores and dissolution pores.The average sorting coefficient of the reservoir is 2.36,the average coefficient of variation is 0.20,and the average median radius is 0.20um.The pore throat distribution of the reservoir is uneven and the pore throat radius is small.According to the displacement pressure,median radius,mercury removal efficiency and mercury saturation in mercury injection parameters,the pore structure of Chang 6 reservoir in this area is divided into class Ⅰ,class Ⅱand class Ⅲ.the pore structure of Chang 6 reservoir is mainly class Ⅱ.

关 键 词：大路沟地区 长6 低渗储层 孔喉结构 

分 类 号：P618.13[天文地球—矿床学]