Dewanto, Ordas and Mulyatno, Bagus Sapto and Rizky, Sri and Alimuddin, Alimuddin Petrophysical Properties Analysis of Reservoir Rock Using Core Analysis and Interpretation Log Data Method To Estimated The Water Saturation (Sw) at OD-1 and OD-2 Wells in The X-Area. Petrophysical Properties Analysis of Reservoir Rock Using Core Analysis and Interpretation Log Data Method To Estimated The Water Saturation (Sw) at OD-1 and OD-2 Wells in The X-Area.

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Abstract

The technology developments of reservoir characterization show importance of understanding the relationships between petrophysical properties of rocks, reservoir parameters and seismic wave parameters. The goal of this study is the evaluation of reservoir condition by analyzing petrophysical properties change in reservoir rock to see the amount of Sw oil and gas in OD1 and OD2 wells by using log interpretation and core analysis method. The porosity () is determined by the results of cross-plot between density log (RHOB) and porosity log (NPHI) when Sw was simply determined by using the Archie equation. The core analysis data showed value of tortuosity factor a=1, and saturation exponent n=2 as a parameter in Sw-Archie equation. Porosity value of reservoir rock in OD1 well is 5.5% to 20%, while OD2 well is 4% to 36%. This study used pickett plot method as the determination of water resistivity (Rw, Rt, Ro) on water bearing area. The results of this research shows OD1 well with =35%, Rw=0.11m and cementation factor m=2 obtained Rt=1m and Sw=100%, Rt=1.2m and Sw=90%, Rt=1.6m and Sw=80%, Rt=4m and Sw=50%, Rt=11m and Sw=30%. While on OD2 well with =42%, Rw=0.13m and cementation factor m=2.3 obtained Rt=1m and Sw=100%, Rt=2m and Sw=70%, Rt=5m and Sw=45%, Rt=20m and Sw=22.4% and so on. If there is a petrophysical parameters (, Rt, Rw, m or a) change, there will be also a change in the fluid saturation (Sw). The conclusion is the changes in the petrophysical properties of rocks affects Sw and Sw distribution is very important to predict the oil and gas reserve in the reservoir rock.

Item Type:	Article
Subjects:	Q Science > QE Geology
Divisions:	Fakultas Teknik (FT) > Prodi Teknik Geofisika
Depositing User:	ORDAS DEWA
Date Deposited:	12 Jun 2017 04:34
Last Modified:	12 Jun 2017 04:34
URI:	http://repository.lppm.unila.ac.id/id/eprint/3106

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