河南双河油田核三段储层的成岩演化特点

双河扇三角洲为高建设型的扇三角洲复合体，由于物源、流向比较稳定，继承性和规律性较强，总体表现为下大上小的迭瓦状退复式沉积。双河油田核三段储层砂岩沉积以后，经历了温和的地演化过程，在压实、蚀变、胶结、交代及溶解作用下，岩石矿物成分、孔隙结构等都相应的得到改造，使原始沉积特征发生了较大的变化，砂悄岩类由于杂基少，孔喉较大，隙间水易于流动，压溶作用，石英、长石的次生加大，早期碳酸盐、铁方解石、铁石云石、重晶石的依序胶结和交代，次生孔隙的生成都比较明显，可以发育成良好的储层。

Research of Diagenetic Feature of Paleogene Sandstone Reservoir Bed in Shuanghe Oil Field

Shuanghe fan delta was high construction composite depositing body. Because the source material and the water stream were steady, the body presented a receding overlain deposition successively. The sand rock of reservoir bed went through a long term diagenetic process after it was deposited. The compositions and the pores of rock stone were transformed, and original depositing feature was reformed. The secondary pores formed in sand fragments rocks is essential for the sand bodies to become profitable reservoir beds.