Effective 83 Days To Develop Technology Block Low Permeability Reservoir

T83reservoir of the Wang Long Zhuang Oilfield southwest is located in Tianchang City of Anhui Province, it is the small layered fault block reservoir formed by two faults shielding effect. In addition to the Jiangsu Oilfield conventional fault block reservoir characteristics, T83has the types typical characteristics of geological structure complex (the formation inclination angle of approximately23°, internal fracture development), poor reservoir properties, heterogeneity serious, complex reservoir.At present, The Dynamic development and the performance of the oil recovery rate is less than0.3%, but the comprehensive water in more than80%, as the result the recovery characteristics is less than4%. Therefore, recognize the T83reservoir development dynamic body control factors that can not only further improve the T83reservoir development, but also for the development of similar low-grade reservoirs to provide the basis for guiding. For the geological characteristics of the reservoir and the existing problems in the development process, the paper carried out the study of the following aspects and got relative results.Firstly, review T83low permeability reservoir geological characteristics and analyze the development difficulties:Primary, using the various the oilfields static geological research and log interpretation results, combined with the testing and production testing data, sedimentology and petroleum geology theory and methods carry out the reservoir geological characteristics understanding. Second, difficulties in the development process are found based on the combination of geological characteristics with the analysis of existing dynamic production.Secondly, low permeability fractured reservoirs effective waterflood development conditions and its influencing factors were studied. Primary, based on seepage features of anisotropic reservoir, unstable seepage law was studied, the maximum injection-production well spacing and the influenced scope were calculated. Start-up pressure gradient affect sweep efficiency and vertical sweep efficiency. Second, on the basis of the T83geological features, the mechanism model was established to analyze factors affecting effective water injection development.Thirdly, the reservoir reasonable development model was studied. Based on effective water flooding theory established above and constraints for a single well waste production, the system to evaluate the water flooding potential has been established. Therefore, it is ascertain that the reasonable pressure system and reasonable development of technology policy of low permeability reservoirs, such as reasonable production rate, reasonable injection-production ratio and reasonable stratified injection.Fourthly, reasonable reservoir development model numerical simulation demonstration was studied. According to the reservoir geological characteristics of the T83, the actual geological model was built by petrel software, so the results was import to the numerical simulation software, and combined with actual dynamic development, the model is fitted for reservoir production history. The remaining oil distribution is studied, as well as to injection-production pattern adjustment, rational development and technology policy optimization program.At last, put forward reservoir adjust views. Based on the theory of Reservoir engineering and numerical, advices of adjustment to improve oilfield development are proposed.