Open AccessOptimization Technique and Practice of Stratified Injection in Low and Medium Permeability Thin Interlayer Reservoirs
Author(s) -
Fan He,
Li Tao,
Yang Li
Publication year - 2021
Publication title -
journal of innovation and social science research
Language(s) - English
Resource type - Journals
ISSN - 2591-6890
DOI - 10.53469/jissr.2021.05.02
Subject(s) - water injection (oil production) , petroleum engineering , permeability (electromagnetism) , injection well , production rate , recovery rate , environmental science , materials science , geology , soil science , process engineering , engineering , chromatography , chemistry , biochemistry , membrane
Reservoir S is a typical medium and low permeability thin interlayer reservoir. It is developed by co-production of directional Wells and separate injection of directional Wells. The comprehensive water content of the oilfield is 54%. Therefore, it is urgent to optimize the injection method of stratified injection distribution in this reservoir, so as to improve the degree of water driving and recovery. In this paper, the reservoir engineering and numerical simulation methods are adopted to introduce the impact factor of injection-production correspondence rate, modify the previously used fine injection matching model, and use the model to quantitatively analyze the sensitivity of key parameters such as longitudinal splitting coefficient, pressure recovery rate and injection-production correspondence rate. The results show that it is very important to select the influencing factors for the injection and production response ratio of medium and low permeability thin interlayer reservoirs, which directly affects the effect of stratified water injection. At present, this research technology has been widely applied in S oilfield, and the water injection effect is very significant, effectively improving the recovery rate of the implementation area by 2%, which provides experience for the water injection development of similar reservoirs.