The Boundary Research Of Potential Evaluation Parameters And Block Prediction In PuBei Oilfield

PuBei oilfield which is in the vault structure of northern PuTaoHua oilfield belongs to narrow thin sand body of low permeability reservoir.At present,the most block has entered later high water cut stage.So you need to use measures such as polymer flooding to enrich remaining oil potential tapping methods.All kinds of field test showed that the polymer flooding in PuBei oilfield narrow thin sand body reservoir has the feasibility of the application.In order to define the potentiality of polymer flooding,this paper has carried out PuBei oilfield polymer flooding potential evaluation and block optimization research.Through the research of this article,we can further clarify the thin narrow sand body of PuBei oilfield polymer flooding potential blocks and establish the classified evaluation of potential selection criteria and standards.At the same time,we should preferably synthesize ground conditions to promote application blocks to lay the foundation and provide decision-making basis for the future of the polymer flooding technology research in PuBei oilfield.Through qualitatively analyzing dynamic and static state parameters on the effect of the polymer flooding in the test well of PuBei oilfield,we should be in combination with the practical situation to select 12 potential parameters and use the grey relational analysis method to calculate the correlation degree of different factors.At last,we identify five potential evaluation parameters.We use the method of numerical simulation to carry out the single factor of influence of polymer flooding and combine with economic benefit analysis to make sure the limits of the potential evaluation parameters and use the statistical analysis results,the parameters of related experimental data and the field test profile data,confirmed the rationality of the parameter bounds;According to the potential preferences line standard,screen out potential into blocks or wellblock 17.The potential blocks which had been screened are classified according to the reservoir properties classification method.The conceptual models of various potential blocks are established by using ECLIPSE numerical simulation software.Meanwhile forecast the development index.Based on the classification results of reservoir properties in potential blocks.By using the method of economic benefit prediction and evaluation,the input-output ratio under different oil prices of each potential block is evaluated in which five potential blocks of polymer flooding are selected.