Development Of A Prediction Model And Software For Water Flooding Based On Material Balance

At present,to improve oil recovery from exploitation mechanism,mobility control,drive for liquid type,reservoir numerical simulation,in order to get the initial reservoir exploitation of displacement information,urgent requirements economic and efficient calculation of water displacement information.Using large scale oil reservoir numerical simulation software not only in the calculation of cost a lot of time,in the operation requirements of more professional,a simplified method for predicting although easy to operate,while restrained by the predicted conditions.This paper,based on the reservoir numerical simulation research,to economy,the fast and accurate prediction of flooding information for the purpose of,and striving to through the research work of this paper and for Reservoir Flooding for prediction provides some theoretical basis for reference and available technology.According to the water flooding technology,established a set of "based on the mass balance of the flooding prediction and evaluation model(PEM)",finally formed a set of"Water flooding prediction and evaluation software" to be able to describe the reservoir oil displacement process,mechanism and the oil displacement rule.This paper completed the following work:(1)establish the flooding prediction and evaluation model(PEM),prediction model is applied perpendicular to the balance obtained relative permeability of pseudo functions,formation of pseudo relative permeability for analog blocks,better explains the simulation block reservoir vertical connectivity and heterogeneity,the two-dimensional vertical system is simplified as a one-dimensional linear problems,this simplifies the equations of flow quantity,and the calculation time is reduced.Model using "vertical balance" method to generate a pseudo relative permeability curve,calculated for a one-dimensional model water flow equation in describing the injection area with areal sweep coefficient,two-dimensional cross-sections get dimensionless well network calculation results.(2)for water flooding oil has established a set of "reservoir water flooding prediction and evaluation model,the reservoir daily oil production,cumulative oil displacement output,Nissan oil pore volume and cumulative displacement for pore volume,water oil ratio and other drive oil data simulation.(3)the development of a set of the reservoir can be described in the process of oil displacement,the mechanism and the law of a block of Daqing reservoir water flooding for the history of fitting,fitting the data with good consistency.To describe than oil slug of polymer adsorption of polymers,the moisture content of PEM software only needs a little time of reservoir water flooding dynamic prediction,not only can get water relative permeability,oil phase relative permeability,reservoir,reservoir water saturation of reservoir,reservoir and other reservoirs sensitive data analysis and curve fitting,can also be calculated daily oil production,cumulative oil displacement production,Nissan oil pore volume and cumulative displacement pore volume,water oil ratio,oil accumulation and so on many kinds of oil displacement data for water flooding,injection rate.