苏北盆地A区块阜三段储层物性及孔隙结构特征

Physical properties and pore structure characteristics of Fu-3 reservoir in block-A of North Jiangsu basin

对苏北盆地A区块阜三段储层物性及孔隙结构特征进行了分析研究，结果表明，孔隙度与渗透率、岩石密度间具有较好的相关性，纵向上出现三个孔隙发育带，分别为〈2100m，孔隙度主要为35％左右；2100～2600m，孔隙度主要为25％左右；2600～3100m，孔隙度主要为20％左右。储层以中小孔微细喉为主，具单孔隙结构，且孔隙结构与物性间具有一定的对应关系，Ⅰ类优质储层主要位于第1孔隙发育带和第Ⅱ孔隙发育带上部，约占15％；Ⅱ类主力储层主要位于第Ⅱ孔隙发育带和第Ⅲ孔隙发育带，约占55％；Ⅲ类较差储层主要位于第Ⅲ孔隙发育带，约占30％。

This paper analyzed on physical properties and pore structure characteristics of Fu-3 reservoir in block-A of North Ji- angsu basin. The results showed that the porosity is closely related to permeability and rock density. There are three pore develop- ment areas in longitudinal zones. The porosity is about 35 % while blow 2 100 meters. The porosity is about 25 % while between 2 100 and 2 600 meters. The porosity is about 20 % while between ：2 600 and 3 100 meters. Reservoirs based on mid-small pores minute throat have single pore structure. The pore structures are related to the physical properties. Quality reservoir Ⅰ is mainly lo- cated in the first area and the top of the second area, about 15 %. Main reservoir Ⅱ is mainly located in the second area and the third area, about 55 %. Poor reservoir Ⅲ is mainly located in the third area, about 30 %.