Research on enhanced oil recovery effect standard of polymer flooding classified well group based on EnKF

Authors

  • Nan Jiang , Yikun Liu* , Jinpeng Tian , Mingda Li , Jiqiang Zhi

Abstract

Due to the different sedimentary environment, development and oil generation conditions of the
target reservoirs of polymer flooding, the reservoir physical parameters of polymer flooding blocks are quite
different, there is a large difference in the extent of enhanced oil recovery between different polymer
flooding well groups, and it is difficult to track development and adjust evaluation. In order to formulate
adjustment standards for polymer flooding phases, it is necessary to formulate phase recovery rate standard
curves for different types of polymer flooding well groups. This paper analyzes the dynamic and static data
of the polymer flooding block to determine the sensitivity of each factor that affects the well group
classification, and establishes the well group classification method using the gray correlation method and
mathematical statistical analysis method; on this basis, the EnKF method is used to invert different well
groups. Through the combination of EnKF method and polymer flooding numerical simulation technology,
the physical parameters of flooding and the relative permeability curve are used to predict the development
effect of different types of polymer flooding well groups, and the development effect standards of different
types of polymer flooding well groups are given.

Published

2020-04-30

Issue

Section

Articles