作者: Jong-Hyun Kim , Yong-Gil Lee
DOI: 10.3390/SU10093322
关键词:
摘要: Since 2007, shale oil and gas production in the United States has become a significant portion of global fossil fuel market. The main cause for increase US is adoption new technologies, namely, horizontal drilling hydraulic fracturing. However, cost comparably higher than conventional gas. In 2014, crude natural price decreased significantly to approximately 40 dollars per barrel, prices 3 million British thermal unit, thus productivity financial conditions exploration producers have worsened critically. Therefore, technological innovation one most interesting issues energy industry. present study analyzes trends having relationship with activities. This calculates learning rate 30 companies from petroleum industry using an improved calculation formula that reflects changes ratio. Thus, more statistically confident results interpretations strategic activities regard industrial environment were achieved this study.