低渗储层五点法井网压驱注水参数优化及现场应用OA

To address the issues of poor parameter matching and lack of quantitative optimization methods during fracturing flooding injection in low-permeability reservoirs,a study on key parameter optimization was conducted.Using the Eclipse numerical simulation software,an ideal five-spot well pattern model was established.Meanwhile,considering the response characteristics of the well pattern and the orientation of hydraulic fracture propagation and distribution,three major categories comprising eight subcategories of fracturing-flooding models were developed.Evaluation indicators for optimizing fracturing flooding parameters were proposed,with particular focus on optimizing critical parameters such as injection volume,half-length of fractures,and injection rate.A variable-rate injection strategy was introduced,ultimately establishing quantitative design limits for process parameters under the theoretical displacement model of five-spot well pattern.Building upon this foundation,the ideal model was mapped to actual field conditions,and fracturing flooding parameter design was applied in Well Group A-1.Results showed that the daily oil production increased to 8.1 t/d from 2.8 t/d before treatment,representing a growth of 189.3%.The average water cut per well decreased from 71.2%to 53.3%,a reduction of 25.1%.These results validate the feasibility and effectiveness of the optimization method for fracturing flooding parameters,providing theoretical support and technical guidance for efficient water flooding development in low-permeability reservoirs.