关键词: 关井, 注采井网, 开发规律, 可采储量, 最终采收率

Abstract:

Long time shutdown of oilfield has a significant influence on oilfield development discipline，recoverable reserves
and recovery ratio. It is an important factor in the adjustment of oilfield development. By analyzing the production performance
before and after the shutdown period and by comparing the oil rate and water cut performance，the oil rate profile influenced by
the shutdown of the oilfield was studied. This study starts from the practical situation of oil reservoirs and lays an emphasis on
practical oilfield production data analysis. The curve of water-cut vs. recovery percent of reserves，the dimensionless forecasting
models，the production decline model and water flooding curves were applied to predict the recoverable reserves and recovery
ratio before and after the shutdown period. In addition，by mutual authentication of different reservoir engineering methods，
the impact of the longtime shutdown on the oilfield development and reservoir characteristics can be analyzed. It has shown
some positive outcomes because of the buildup of the producing energy，the redistribution and movement of the underground
fluid. This research fills the gap in researches on influence of long-term shutdown and provides a new angle of analyzing oilfield
discipline in similar oil reservoirs.

Key words: shutdown, flooding well network, development discipline, recoverable reserves, recovery ratio