Reservior engineering

anwer all

Calculate the bulk volume of the gas cap of a reservoir whose areal extend is 940 acres, i.e. the area enclosed by the zero thickness contour. The areas enclosed by the 4,8,12, 16 , and 20ft isopach lines are 752,526,316,142, and 57 acres, respectively. The greatest thickness within the 20ft isopach line is 23ft. Show that when the ratio of the areas enclosed by two successive contours is 0.50, the error introduced by using the trapezoidal formula is 2% greater than the pyramidal formula What error is introduced by using the trapezoidal formula instead of pyramidal formula when the ratio of the areas is 0.333