Experimental Study of Vertical Gas Injection and Huff n Puff methods

Huff n Puff method is one of the important EOR method. Because of existence of enough gas reservoirs in Iran, mentioned method could be used for enhancement of oil recovery of Iranian reservoirs. The goal of attainment of this study is analyze of enhancement recovery of Huff n Puff method as a recommendation method for enhance oil recovery in one of Iranian oil reservoirs. In this study, first proceeded to analyze Gas Oil Gravity Drainage due to gas injection in sand pack with reservoir condition (80 centigrade degree and 2000 psi pressure) and second, analyze of Huff n Puff method. All of experiments done in sand pack with 1500 millidarcy permeability and dead oil with 24.56 API and methane injected gas. Experiments results exhibit that oil recovery of gas injection has been 28.71 percent for told reservoir conditions and enhancement of recovery for Huff n Puff method is about 8-9 percent. At final, two experiments (WAG and water injection) were done and compared with them.

Keywords:

Gas Injection , Huff n Puff , Optimum Rate , Oil Recovery , Sand Pack.