The study of accommodation of injection-production pattern for Chang6_2 Reservoir, ST2 borefield,Zhenjing oilfield

The Chang 62 reservoir of ST2 borefild of Zhenjing field is typical extra-low permeability reservoir, which present serious heterogeneity, partly micro-fracture dense, pooroil/water transition zone characteristics. Since putting intoproduction, the liquid and oil producing quantum of single well was low, production declining rate was high in early days, liquid producing capacity was low and hard to improvein later stage. Based on Chang 6 reservoir development characteristics, this paper make research on accommodation of injection-production pattern referring to rational spacing between wells, well spacing density, injector producer ratio,and offer some proposals to future regulation, forecasted and demonstrated by numerical model, which is meaningful toguide the future rational and efficiently development.