If you have the following: The depth of the oil reservoir is 13,000 feet from the sea surface, the area of the oil- containing layer is 47,000 square feet, the thickness of the layer that contains oil is one foot, the degree of porosity is 20%, the water percentage is 25%, the shrinkage rate is 65%, the recovery factor is 45 %. It is required to extract the amount of oil in the barrel, if you know m = 10.764 feet, foot = 0.17811 feet from the barrel