碎屑岩储层的两种不同成岩序列

Two Different Diagenetic Successions of Clastic Rock Reservoirs

碎屑岩储层的成岩作用可分为两大序列,即连续埋藏成岩序列和间断埋藏成岩序列。前者表现为沉积物沉积后一直下沉,其各种成岩事件的演化受埋深的控制,储层孔隙度的演化及储集性也随埋深变化而具有明显的分带性;后者表现为多种成岩事件的演化主要受构造运动的影响,成岩演化复杂,其储层的储集性受不整合面控制。

The diagenesis of clastic rock reservoirs can be divided into two successions, i. e. successively buried diagenetic succession and intermittently buried diagenetic succession. In the former case sediments subside successively after deposition, the evolutions of its diagenetic events are controlled by depth, and the reservoir properties and porosity have distinct features of zonality with the change of depth. In the latter case the evolutions of the diagenetic events are mainly influenced by tectonic events, its diagenetic evolutions are complex and the reservoir properties are controlled by uncomformities.