Changes

[[File:UGM_Vibro_Fig_2.png|thumb|300px|{{figure number|2}}Translation move illustration.<ref name=Ralph />]]

[[File:UGM_Vibro_Fig_2.png|thumb|300px|{{figure number|2}}Translation move illustration.<ref name=Ralph />]]

In result of study analysts in laboratorium about core syntesis, vibration stimulation can repair the characteristic of rock physic that increase the porocity (φ) until 15.3% and absolute pearmeability (kabs) until 2.2% and decrease saturated oil remain (Sor) until 53.6%. From the result above need to do the reasearch that analysts the effect of vibration frequencyand pressure about porosity (φ), Kabs and Sor in cornfield.<ref name=Ridaliani_et_al>Ridaliani, O., T. Ariadji, and G. Handayani, 2005, Prediksi Perubahan Sifat Fisik</ref>

In result of study analysts in laboratorium about core syntesis, vibration stimulation can repair the characteristic of rock physic that increase the porocity (φ) until 15.3% and absolute pearmeability (kabs) until 2.2% and decrease saturated oil remain (Sor) until 53.6%. From the result above need to do the reasearch that analysts the effect of vibration frequencyand pressure about porosity (φ), Kabs and Sor in cornfield.<ref name=Ridaliani_et_al>Ridaliani, O., T. Ariadji, and G. Handayani, 2005, Prediksi Perubahan Sifat Fisik Batuan Reservoir Dengan Studi Laboratorium Stimulasi Vibrasi Terhadap Contoh Batuan Lapangan Pada Berbagai Tekanan Overburden. Department Petroleum Engineering: Institut Teknologi Bandung.</ref>

The analysts use the Hasler Permeameter tool with modification with vibrator. First model that designed with vibrator place above the core holder according vertical vibration direction. Meanwhile second model with vibrator that place beside core holder with horizontal vibration direction and direction beetwen vibrator and core holder closer than the first model. From the result of laboratorium study with second model tools in 15 core in the field, find that the the porocity before vibration is 4.84%-26.73% and after the vibration the porosity increase until 53.9% with average 36.6%. Kabs data before vibration is 231.46 m – 1113.59 mD and after vibration can reach 54.1% with average 39.4%. Sor Data before vibration is 0.15%-0.57%. and after vibration can reacht decrease Sor untul 68% with average 66.1 %. From the result above, there is the same result beetwen sysntesis core and field core that give the image about the same changing pattern in rock pysical properties (φ, kabs and Sor) because the effect of vibration stimulation with increase of porosity and kabs and the decrease of Sor. The effect of pressure in vibration stimulation make the system is confined, and the direction effect from the vibration source about core holder can as effective as radius from vibrator strength.<ref name=Ridaliani_et_al />

The analysts use the Hasler Permeameter tool with modification with vibrator. First model that designed with vibrator place above the core holder according vertical vibration direction. Meanwhile second model with vibrator that place beside core holder with horizontal vibration direction and direction beetwen vibrator and core holder closer than the first model. From the result of laboratorium study with second model tools in 15 core in the field, find that the the porocity before vibration is 4.84%-26.73% and after the vibration the porosity increase until 53.9% with average 36.6%. Kabs data before vibration is 231.46 m – 1113.59 mD and after vibration can reach 54.1% with average 39.4%. Sor Data before vibration is 0.15%-0.57%. and after vibration can reacht decrease Sor untul 68% with average 66.1 %. From the result above, there is the same result beetwen sysntesis core and field core that give the image about the same changing pattern in rock pysical properties (φ, kabs and Sor) because the effect of vibration stimulation with increase of porosity and kabs and the decrease of Sor. The effect of pressure in vibration stimulation make the system is confined, and the direction effect from the vibration source about core holder can as effective as radius from vibrator strength.<ref name=Ridaliani_et_al />

==Other sources==

==Other sources==

* Batuan Reservoir Dengan Studi Laboratorium Stimulasi Vibrasi Terhadap Contoh Batuan Lapangan Pada Berbagai Tekanan Overburden. Department Petroleum Engineering: Institut Teknologi Bandung.

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* Sukandarrumidi. 1995. Batubara dan Gambut. Yogyakarta: Gadjah Mada University Press. Sukandarrumidi. 2006. Batubara dan Gambut, Pengantar Teknologi Batubara Menuju

* Sukandarrumidi. 1995. Batubara dan Gambut. Yogyakarta: Gadjah Mada University Press. Sukandarrumidi. 2006. Batubara dan Gambut, Pengantar Teknologi Batubara Menuju

* Lingkungan Bersih. Yogyakarta: Gadjah Mada University Press.

* Lingkungan Bersih. Yogyakarta: Gadjah Mada University Press.