Development sequence optimization of fault-block oilfields based on the ICA-BP algorithm
Defining the development sequence of each fault block in the fault-block oilfield group is a pre-requisite for the development scheme design.When the number of fault block oil fields is few,the combina-tion of technology and economy can be compared,but when the number is large,it will form a massive com-bination and take a long time.Existing methods include weight evaluation,analytic hierarchy process,com-prehensive fuzzy evaluation,etc and they have strong subjectivity in selecting evaluation indicators and indi-cator weights,and cannot achieve completely objective evaluation.Therefore,ICA-BP algorithm,an im-proved back propagation neural network model based on the imperial competition algorithm is proposed.Firstly,Spearman correlation coefficient method is used to determine the main control factors affecting the development of fault-block oilfield,and then Hermite interpolation method is used to expand the fault-block oilfield group development database.Finally,based on a large number of training samples of the ex-panded database,the improved back propagation neural network model based on the imperial competition al-gorithm can determine the weight of the parameters affecting the development effect and predict the net pres-ent value of each fault block oilfield.The development order of each fault block can be determined accord-ing to the net present value.This method is based on the geological reservoir database of the actual fault-block oilfield group as the evaluation basis.The development sequence of fault-block oilfield is more sci-entific and reasonable,and the overall net present value of the project is significantly higher than the devel-opment sequence combination determined by traditional methods,avoiding human subjectivity,saving the workload of numerical simulation and economic evaluation,and overcoming the limitations of existing meth-ods.It is meaningful to improve the comprehensive benefit of the development of fault-block oilfield groups.
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