Publications

Reservoir Z-600 is one of the oil and gas reservoir located in areas of Pertamina EP WKP Northern Sumatra Region that will be developed into fullscale waterflooding, so it was needed to do a pilot injection to estimate the performance of water injection in each pattern and magnitude of planned water injection which is required for pattern so as to obtaine the optimum amount of oil that can be produced as an overview of the implementation in the field. The Election candidate workover, injection and production wells is obtained by analysis of scatter plot, bubble map, supported by well history data and overlay permeability distribution map, porosity and oil saturation and the final production of wells. The candidate of pattern is based on the condition of the existing wells, distribution of high porosity and permeability and water cut. It also considers the distance between the wells in a pattern that aims to make time breakthrough does not happen too quickly or too – latter and the properties of rocks between production and injection wells by calculating the heterogeneity in the vertical plane using the method of Dykstra Parson and the driving mechanism acting on the reservoir. The goal is to see the effects of heterogeneity on the pitting of a pilot project in order to obtain maximum displacement efficiency and the effectiveness of optimum water injection rate to acquisition of recovery factor. The results of the injection rate sensitivity of each pattern to obtain the optimum recovery are pattern peripheral in the compartment A1 with rate of 800 bbl/day obtained cumulative production 5.19 * UPN “Veteran” Yogyakarta ** Pertamina EP -EOR MMbbl by RF 32.95%. Inverted five spot pattern in the compartment B with rate of 600 bbl/day obtained cumulative production at 3.41 MMbbl with RF 43.56%, and pattern five spot normal in the compartment C2 with rate of 400 bbl/day obtained cumulative production 3.31 MMbbl with RF 31.71%. Pattern five spot inverted obtained the biggest incremental than the other pattern achieve 8.54 % because of the CPV value relative homogeneous and also the distance between wells in this pattern is not too far with time breakthrough average about 8 month with the geological structure of the anticline bounded on the north and south sides of a fault that is leaking. (Please review) Keywords : Pilot water injection, Pattern, CPV, Scatter Plot, Overlay Map, Reservoir simulation, Rate sensitivity, Recovery Factor