Optimization of Well Factory Platform Mode Considering Optimal Allocation of Water Resources

The well factory mode can effectively reduce the drilling, platform and fracturing cost in shale gas development. The scale effect is an important factor affecting the flowback fluid treatment cost, and the number of wells covered on the platform directly affects the flowback fluid treatment scale. Based on this knowledge, multi-objective optimization of water resources management is carried out to study the optimal balance between economic cost and environmental impact under given conditions. The result of numerical example analysis shows that increasing the number of wells per platform can significantly reduce 25.02% of water resources management cost and 27.2% of sewage discharge. Based on it, the optimization model of platform position under well factory mode is established. The proposed model studies the relationship among water resources management cost, drilling cost and platform position. At the same time, according to the genetic algorithm, this paper develops a strategy to solve the optimization model. The case study indicates that the optimization model can reduce the platform amount in a given area and increase the number of wells per platform. The study demonstrates that the proposed model can give full play to the technical advantages of the well factory, which significantly reduces the cost of shale gas development by 12.67% and 27.2% of sewage discharge.