Comprehensive Evaluation On Marcellus Shale Gas And The Inspiration For China

The United States is the world’s best country in the development of large-scale and economical shale gas,and at the same time,Marcellus is the largest shale gas production play in the United States.The feasibility of shale gas E&P is the premise of shale gas industry development,and the evaluation of shale gas E&P is often from the perspective of economic value.In addition,the international academic community also proposes evaluation from energy and water perspective.Evaluation,considering that economic value,net energy output,and water resource utilization are important issues in different dimensions of shale gas mining,this paper intends to comprehensively evaluate the Marcellus shale gas E&P in the United States from multiple dimensions.It forms a more comprehensive and in-depth understanding of the objective laws of shale gas E&P in Marcellus,USA,which is of great significance to the development of shale gas industry in China.In this paper,we use the Drilling Info database to get the average EUR.As for the output data,and the paper use the data obtained by data averaging of water resources,energy input and cost input of seven large shale gas companies in Marcellus,which used to represent Marcellus average level.the evaluation of the newly added shale gas wells in Marcellus in 2013-2017 from the energy return of investment（EROI）,energy return of water input（EROWI）and economic（FROI）dimensions,respectively.Finally,the maximum-minimum extremum method is used to process the index and the expert evaluation weighting method is used for comprehensive evaluation,and the sustainability of shale gas E&P is clarified as a whole.Through the above calculation and analysis,the paper finds:（1）The average EROI_stdof the new drilled wells life cycle in 2013-2017 is greater than 25,but its EROI is decreasing year by year,only has the E&P value in the short term;（2）The average EROWI of shale gas wells has been declining,and technological innovation has accelerated the recycling of wastewater.However,due to the deep increase of drilling depth,the water consumption of fresh water has not decreased;（3）Under the price of natural gas is 2.09$/mcf,the life-cycle FROI of the new drilled wells is above 1.48,showing a downward trend.From the perspective of cumulative actual production,it takes about 3 years to recover the cost for a single well;（4）Comprehensive evaluation of American Marcelle The average result of shale gas is between[0.17,0.32],and has the E&P value in all fossil energy in the short term,but does not have the comprehensive value of long-term mining.With the decrease of high-yield wells,the American horse The Cyrus shale gas revolution is likely to end.Finally,we propose three suggestions combined with the status of China’s shale gas development.