Tight gas reservoirs are characterized by narrow pores and throats, abundant clay minerals, and developed fractures. These lead to severe formation damage during drilling, negatively affecting ...

As defined by the U.S. Geological Survey (USGS), heavy oil is a type of crude oil characterized by an asphaltic, dense, viscous nature (similar to molasses), and its asphaltene (very large molecules ...

Proven oil reserve is equal to rest of the world combined. Nov. 13, 2012 -- Drillers in Utah and Colorado are poking into a massive shale deposit trying to find a way to unlock oil reserves that are ...

Cells, the basic unit of life, are surrounded by a limiting membrane called the plasma membrane. Inside cells, there are various membrane-bounded organelles, each of which has various and distinctive ...