The main task in oil and gas exploration is to gain an understanding of the distribution and nature of rocks and fluids in the subsurface. Well logs are records of petro-physical data acquired along a borehole, providing direct information about what is in the subsurface. The data collected by logging wells can have significant economic consequences, due to the costs inherent to drilling wells,...

Since fossil fuel emissions will continue indefinitely, we must find a suitable and long-term alternative, owing to the fact that it is biodegradable, non-toxic, eco-friendly, biodiesel an excellent substitute for diesel engines. EASAC classifies evolution of into four generations. Biodiesel feedstocks their advantages disadvantages different generations are thoroughly analysed in this article....