How to optimize the investment decision of shale gas multi-objective green development for energy sustainable development?

Facing the global low-carbon energy transition trend, the issue of energy sustainable development has attracted increasing attention. To promote the sustainable development of shale gas resources, investment in shale gas development should not only focus on economic benefit, but also consider environmental pollution and emission reduction. Therefore, investment of shale gas development involves multiple objectives, which requires multi-objective investment decision optimization research. This study innovatively combines investment decisions with sustainable development. A multi-objective decision-making optimization model for investment portfolio of shale gas green development is constructed to solve the optimization of shale gas block portfolio and the allocation of exploration and development investment amount under multiple competing objectives and constraints. The results show that shale gas favorable block with low single-well development cost, high initial average production, low methane emission and internal environmental cost will be selected into a Pareto optimum set, and the three objective functions of optimal investment portfolio have a wide range. In the process of determining the final scheme, when emission reduction effect is given priority, final investment schemes are the same regardless of the order of economic benefit and environmental pollution; when economic benefit or environmental pollution is given priority, the preference order of the other two objectives will affect the choice of final investment scheme.