into the injection well at a rate of 25 standard cubic feet of air per hour for 24 hours to ensure that an air swept zone is formed between the injection well and production well within the cell a commercially available naphtha is thereafter introduced into the injection well and fluids are recovered from the production well for 4 hours the injection production roles are thereafter reversed it being desired to utilize the well employed for fluid injection in the communication path formation stage as the production well in the primary oil recovery process in order to take advantage of the fact that the communication path is larger in both the horizontal and vertical direction around the well employed for fluid injection during the communication path formulation stage than it is in the vicinity of the well employed for the production well during the same communication path forming stage the oil recovery process to be studied involves injecting 90 percent quality steam at 500 pounds per square inch and 471 u00b0 f there being mixed with the steam approximately 3 percent by weight of the commercially available naphtha oil recovery and fluid injection are monitored on a timed basis in order to determine the oil recovery as a function of pore volumes of steam injected the oil recovery phase is continued until 8 pore volumes of steam are injected into the cell based on the total pore volume of the entire cell because the pore volume of the portion of.