Publications

Significant numbers of new technology wireline logging namely Combinable Magnetic Resonance (CMR*), Elemental Capture Spectroscopy (ECS*), Reservoir Saturation Tool (RST*) - Sigma mode, and the latest technology Array Di-electric Tool (ADT*) were run in Field-X. These tools were run along standard logging tools such as Gamma Ray (GR), Spontaneous Potential (SP), Resistivity, and triple-porosity measurements. The challenge comes with how to utilize all this data for a petrophysical evaluation to compute the “true formation property”, including lithology and porosity, which is useful to drive the final water saturation computation. This paper highlights a new petrophysical approach for Field-X that integrates all the standard measurements with the latest technology information as a standard calibration and reference purpose. The working steps include how to: • Compute the correct clay volume and volcanic volumes by utilizing the relationship of Density- MR* and Density-Sonic (for the well without CMR* measurements), staying away from the conventional lithology identification using the GR log. • To produce the “true formation porosity” from three conventional porosity measurements (density-neutron-sonic) by referring to the independent to lithology porosity logging measurement (CMR*) • Finally, it proves that the Archie and modified Archie (Indonesian saturation equation) works properly with only using a single salinity input and constant Archie parameters (a = 0.8, m = n = 2), which fit well with the ADT* interpretation. The final output of this analysis has been tested and proved to work widely at observed Field-X.