页岩气田开发方案多目标优化研究

Research on the multi-objective optimization of shale gas field development plan

页岩气田的开发特征和经济运行规律具有特殊性,页岩气田开发方案需要综合技术指标和经济指标进行综合评价,因此确定页岩气田最优开发方案是一项复杂的多目标优化工程。本文以国内某页岩气田为例,为了确定最优的开发方案,考虑不同的技术参数设计了多套开发方案,并在不同的经济参数条件下,对各个开发方案开展了经济评价,认识了开发方案的经济效益变化规律;建立了基于灰色优化理论的页岩气开发方案多目标优化方法和流程,在开发方案指标预测和经济评价的基础上,以总产能、建产规模、稳产年限、EUR、财务净现值及内部收益率为评价指标,综合确定了某页岩气田在目前气价和补贴政策情况下的最优开发方案。

The development characteristics and the economic law of shale gas field are special.The development plan of shale gas field needs synthetic evaluation considering technical index and economic index.Therefore,it is a complex multi-objective optimization project to determine the optimal development plan of shale gas field.Taking a shale gas field in China as an example,in order to determine the optimal development plan,different technical parameters are considered to design multiple development plans for the X shale gas field,and the economic evaluation is carried out on considering different economic parameters.The economic benefits change rule of the development plan under different technical and economic parameters are recognized.A multi-objective optimization method for shale gas development plan based on grey optimization theory has been established.Based on the development index and economic evaluation results,considering the multi-evaluation indexes such as total capacity,production scale,steady production years,EUR,the net present value of finance and internal rate of return,the optimal development plan of the gas field has been determined by using the new established method.