Optimization Oil Recovery for the Development of Rantau Field by Using Quantitative Interpretation Seismic : Inversion model, RMS Attribute & Density Porosity Multi Attribute

Abstract

Rantau field is one of the mature fields that still active and managed by Pertamina EP Asset 1. As a mature field special action is needed for the development for primary oil recovery optimization, which is a challenge. The success of the R-XXX well intervention, made it produced with average production 160 barrels oil per day (bopd) in shallow zone layer on June 2018.
It was one of Dutch remnant which has lack of historical and logarithmic data information. Moreover, the well position, where is located in flank structural and has less references, is difficult to develop on the side of the structure. To be able to see the lateral distribution of the reservoir requires these methods: the integration of seismic inversion method, Root Mean Square (RMS) attribution and multi attribute porosity & density.
The results of quantitative seismic is to explain tidal and bar deposition environment. The integration of attribute interpretation and acoustic impedance through model based inversion, RMS attribution, multi attribute porosity & density in shallow zone layer describe the distribution of reservoir with cutoff range interval of impedance value 2200-4000 (m/s)*(g/cc) and non-reservoir 4000- 6000(m/s)*(g/cc). It was a simple seismic quantitative interpretation but quite sensitive to support the characteristic of shallow zone reservoir in flank area structure which illustrates potential reservoirs containing hydrocarbons. There is still uncertainty to characterize reservoir that will be developed using quantitative seismic interpretation for improving oil recovery of mature wells. However, with various quantitative seismic integration could help reduce the uncertainty.