Acoustic Impedance Inversion To Identify Oligo-Miocene Carbonate Facies As Reservoir At Kangean Offshore Area

41st HAGI Annual Convention and Exhibition 2016

Purnama, Arif Zuli^1 ; Machmud, Pritta Ariyani^1 ; Nurcahya, Budi Eka^1 ; Yusro, Miftahul^2 ; Gunawan, Agung^2 ; Rahmadi, Dicky^2

Universitas Gadjah Mada, Yogyakarta

55281, Indonesia^1

SKK Migas, Jakarta

12710, Indonesia^2

关键词: Acoustic impedance inversion;    Carbonate reservoir;    Hydrocarbon reservoir;    Inversion process;    Inversion results;    Model based inversion;    Quantitative and qualitative analysis;    Reservoir quality;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/132/1/012010/pdf
DOI  :  10.1088/1755-1315/132/1/012010

来源: IOP

【 摘 要 】

Model based inversion was applied to inversion process of 2D seismic data in Kangean Offshore Area. Integration acoustic impedance from wells and seismic data was expected showing physical property, facies separation and reservoir quality of carbonate rock, particularly in Kangean Offshore Area. Quantitative and qualitative analysis has been conducted on the inversion results to characterize the carbonate reservoir part of Kujung and correlate it to depositional facies type. Main target exploration in Kangean Offshore Area is Kujung Formation (Oligo-Miocene Carbonate). The type of reservoir in this area generate from reef growing on the platform. Carbonate rock is a reservoir which has various type and scale of porosity. Facies determination is required to to predict reservoir quality, because each facies has its own porosity value. Acoustic impedance is used to identify and characterize Kujung carbonate facies, also could be used to predict the distribution of porosity. Low acoustic impedance correlated with packstone facies that has acoustic impedance value below 7400 gr/cc∗m/s. In other situation, high acoustic impedance characterized by wackestone facies above 7400 gr/cc∗m/s. The interpretation result indicated that Kujung carbonate rock dominated by packstone facies in the upper part of build-up and it has ideal porosity for hydrocarbon reservoir.