Compositional naturally fractured 3D simulations studies are presented for the mexican Fenix and Giraldas gas condensate fields, aimed at investigating the effect on the high condensate content recovery of these fields of a very active aquifer (average reservoir pressure above the dew point pressure (DPP) during the 20 years producing history of the reservoir), and of water injection in a limited aquifer, for the former and the latter respectively. Both fields, the Fenix and the giant Giraldas, are currently at an advanced exploitation stage (20 and 22 years), resulting in a extensive production data set for this study. A review of the literature indicates that
very few cases of gas-condensate reservoirs operated under natural water influx have been Because the liquid content of the gas- reported2. To be attractive economically, condensate reservoirs is a valuable and natural water influx should be sufficiently important part of the hydrocarbon strong to support pressure high enough to accumulation, and because of the liquid minimize condensed hydrocarbon losses in the retrograde condensation that occurs for formation. pressure conditions below the dew-point, a The purpose of this work is to present the large fraction of this liquid may be left in the results of a study for the mexican Fénix and reservoir at abandonment if the reservoir is Giraldas gas-condensate fields, aimed at produced under natural depletion1. investigating the effect on the high condensate Pressure support of a gas-condensate content recovery of these fields of a very reservoir may be provided by virtue of active aquifer (average reservoir pressure (1) an active water drive after moderate above the DPP during the 20 years producing pressure reduction from early production, history of the reservoir) and the simulation of (2) through water injection operations, water injection in a limited aquifer, for the (3) gas injection, or former and the latter, respectively. (4) combination of all of these2. In recent times the results presented by several authors3-4 have made possible to WATER INFLUX AND conclude that under proper conditions, water INJECTION INTO GAS injection in gas condensate reservoirs is a CONDENSATE RESERVOIRS. viable alternative. This pressure support In waterflood operations of gas- process offers the possibility of producing a condensate fields following the method higher liquid recovery from these reservoirs suggested by Rivas-Gómez4, the condensate than natural depletion, because less liquid saturation in the vicinity of the wells can be phase condenses in the formation. Pressure reduced (sometimes prevented during most of support in these reservoirs has been usually the reservoir producing life) which will be carried out throug
