I am not an economist but somehow I doubt that people chanting "Drill Here, Drill Now" caused a decrease in demand for oil in China and India.
However, with oil at under $50,00 there will be little incentive to expand E&P in the United States.
And also a great time to start buying oil again for when it goes up. Oil will likely languish in the $40 range for quite some time but eventually it will come back.