储集层微观演化的成因探讨与微观剩余油研究

1. Introduction Finding more recoverable remaining oil in continental rift-subsidence basins in the east China is an important task. The evolution of the reservoir properties during the long-term water-flooding, including the mineral grains, matrix cement…

Genesis of Micro Evolution and the Remaining Oil in the Reservoir

Due to the continuous water percolation and soaking during development of the oilfields, the dynamic balance of a reservoir is altered by the fluid; and the rock framework, pores and throats will be reformed and destroyed. The interaction between the fluid and the rock leads to a series of micro geological processes, such as clastation, denudation, dissolution and deposition, in the small spaces connected by pores or throats, which control the accumulation and distribution of the remaining oil. These micro geological processes are the essential factors for the evolution of the reservoirs during development. This evolution makes the recovery of the remaining oil more complex.