Experimental Study of IFTReduction in Fracture Carbonate Reservoir by Triton X-100

Even after primary and secondary recovery processes have been completed still large quantity of the oil still lays trapped in the reservoir. This trapped could be either oil residual or by-passed oil. Residual oil occurs as a result of high capillary action of water that keeps the oil immobile. One way of recovering this capillary trapped oil is by flooding the reservoir with surfactants. Surfactants are surface active agents that act on the interface between oil and water with the aim of reducing the interfacial tension between them.There by causing trapped oil to flow. As the increasing water cut and reduced oil production it becomes obvious that water flooding alone cannot recover the oil effectively. Thus use of enhancing agent is like surfactant is one of the solutions. When flooding take place in reservoir with surfactants, with the right quantity that would yield the maximum recovery without unnecessary waste of the surfactant because of the high cost.In this paper the effects of Triton X-100, on the reduction of interfacial tension (IFT) between brine and oil sample obtained from fracture carbonate reservoir was studied at the reservoir temperature. The result showed maximum reduction on the interfacial tension between oil and water at a concentration of 0.8 wt% of Triton X-100 was occurred.