【作者】 于淼； 彭晓蕾； 刘立； 张吉光； 孟繁奇； 赵爽； 周冰；

【Author】 YU Miao~1,PENG Xiao-lei~1 Liu Li~1 ZHANG Ji-guang~2 MENG Fan-qi~1 ZHAO Shuang~1, ZHOU Bing~1 (1.College of Earth Sciences,Jilin University,Changchun Jilin Province,China,130026;2.Exploration Subcompany of Daqing Oilfield Company,CNPC,Daqing Heilongjiang Province,Chin,a 163453)

【机构】 吉林大学地球科学学院； 中国石油大庆油田公司勘探分公司；

【摘要】 延吉盆地是的东北地区重要的含油气盆地。根据储层物性数据,结合普通薄片和扫描电镜等测试分析技术,查明了延吉盆地铜佛寺组和大砬子组储层物性特征,揭示了储层物性变差的主要原因。延吉盆地铜佛寺-大砬子组储层属于中-低孔特低渗型的致密储层。储层物性变差的主要原因为高含量的杂基和胶结物。其中,杂基贴附在颗粒表面,降低了储集砂岩的孔隙度和渗透率;方解石的大量胶结最终导致储层物性较差;浊沸石普遍发育,且未被溶蚀也不利于储层物性的改善。更多还原

【Abstract】 Yanji basin is the important petroliferous basins in the northeast of China.On the basis of porosity and permeability data,the characteristics and the cause of densification of sandstone reservoir in Tongfosi and Dalazi formation of Yanji basin were investigated by polarizing microscope and SEM.The reservoir in Tongfosi and Dalazi Formation in Yanji basin is characterized by medium to low porosity and extra-low permeability.The hight content of matrix and cement play the main contribution to form the poor porosity and permeability.The matrix,distributed on the surface of clastic grain,reduce the porosity and permeability.And the large abundance of calcite cement lead to the poor reservoir.The laumontite without dissolved is not conducive to improve the reservoir porosity and permeability.更多还原