Study The Adaption Of The Tracer In Zhuang36Low Permeability Reervoir

Zhuang36low permeability reservoir is a low permeability, low pressure, low-yield"th1ree lows’ reservoir. In recent years, oil production gradually reducing, the choice of theappropriate tracer of this block and Using tracer detection to detect and analyze the reservoirconnectivity, the injection of fluid distribution and movement law, reservoir heterogeneitycharacteirstics,determining the perforating and layer-based nature of the spacer layer are thebasis of enhancing oil recovery.In this paper,by the analysis of the geological characteirstics of thestudy block and tracerusing the status,the screening principles of chemical tracer, particles, trace elements tracersare summarized and the performances of the vairous types of tracer arc evaluatedcomprehensively-According to the mercury intrusion curve, using the the Purcell method andWall method can calculate the minimum flow pore throat radius of the main developmentlayer Chang8] reservoir and investigate the matching of minimum flow pore throat andparticle tracer. Comprehensive screening tracer, to operate laboratory experiments andanalyze the applicability of the chemical tracers in Chang8].The trace elements tracers in thisblock rock static adsorption and dynamic stranded has been studied. According to the site testresults,the effect of chemical tracer used in this block is analyzed,and under the tracer explainresults the flow of injection water is tracked, the type and amount of blocking agent arcselected，reservoir heterogeneity is evaluated and analyzed.By and calculating theapplicability of the low permeability reservoir tracer of the Zhuang Area36, the followingconclusionsare obtained. Chemical tracer sodium nitrate, ammonium thiocyanate areapplicable for Chang8i layer，Chang8i minimum flow pore throat radius is0.0100p.m.Choosing the particle tracer should select nano-powder and the particle size should be lessthan0.00465|im.Chang811is medium heterogeneous reservoir,Chang812is strong reservoirsthese situations, the corresponding recommendations are made.