东营凹陷古近系碎屑岩储层次生孔隙发育规律

东营凹陷古近系碎屑岩储层的孔隙经历了由原生到次生的演化过程,主要储集空间为次生孔隙,不同深度范围分别发育不同的孔隙组合类型。平面上,次生孔隙发育的深度由北向南有增大趋势,但发育程度明显减弱。碳酸盐矿物溶蚀作用、长石矿物溶蚀作用、粘土矿物脱水作用是东营凹陷古近系碎屑岩储层次生孔隙的主要成因,储层物性主要受沉积条件及压实、碳酸盐胶结和溶蚀作用控制,各因素之间存在一定制约关系。

Second Pore Development Laws of Paleogene Clastic Reservoirs in Dongying Sag

The pores of Paleogene clastic reservoirs in Dongying sag have evolved from primary pores to second pores,and its reservoir space is mainly the second pores. Different pore assembly types developed in different depth. Horizontally,the development depth of second pores increases from north to south,but the development degree gets weaker. The main causes of the second pores development contain the carbonated minerals denudation,the feldspar denudation,and the clay minerals dehydration. The reservoir physical ...