Study On Technology And Policy Of Water Injection Development In B Oilfield

B oilfield in the south is China's Bohai Bay in the shallow waters of the heavy oil reservoir,with increasing block development of the depth and drilling data,of geological understanding more in-depth and a certain change,the existing scheme has not adapted to the further development requirements,needs to carry on the fine reservoir description,so as to determine the later development way.The referring to a large number of relevant literature and absorption B oilfield in the south in recent years,the research results,according to the reservoir characteristics of the oilfield,through to seismic and geologic information analysis and combined with the logging information to establish reservoir information database,to carry out small layer contrast and the establishment of the fine reservoir geologic model and reservoir parameters is determined.Through the research and optimization of waterflood development and main points of the policy proposed a set of suiTablefor the geological characteristic of oil reservoir development model and the corresponding adjustment plan,to achieve the ultimate enhancing oil recovery rate target to lay a solid foundation.Research shows that B oilfield should make full use of natural energy exploration in the early stages of development,when the pressure dropped to 0.85 Pb the start of injection effect is the best,the best pressure recovery time for about 1 years and a half;in the water at the initial stage of development,should be through the use of well pattern infilling and layered mining to improve the degree of oil recovery;in high water cut development period can be achieved by the use of profile control and water plugging,polymer flooding and increasing liquid production rate and other strategies to improve the degree of recovery,which improve the liquid production rate,massive production and injection into economic benefits the best measures,but also pay attention to keep the pressure above saturation pressure level should be in production,but not higher than the saturation pressure too much,otherwise easy to cause the water to rise too fast.Complete the design of multiple sets of different development stages of the production adjustment scheme,and forecasts the development of numerical simulation and the corresponding index,provides the direction for the next decision.