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The AAPG/Datapages Combined Publications Database

Indonesian Petroleum Association

Abstract


14th Annual Convention Proceedings (Volume 1), 1985
Pages 141-156

Laboratory Experiment on CO2 Injection

Warno Husodo, Rahmat Sudibjo, Barry W. Walsh

Abstract

Laboratory experiment on CO2 injections were carried out at the EOR-Lab. of the PPTMGB "Lemigas" Jakarta Indonesia. The purposes of this experiment were to evaluate carbon dioxide minimum miscibility pressure (CO2 – MMP) for the crude oils from selected reservoirs in Indonesia, and to compare CO2 – MMP obtained from this experiment with those predicted by the correlations of both Holm-Josendal and Yellig-Metcalfe, and also the effect of temperature on CO2 – MMP.

Two types of oils from different reservoirs were considered i.e. stock tank oil from Cepu, East Java, and recombined oil from East Kalimantan. Both of them were sampled from surface separator.

PVT data and fluid compositions of the oils were analyzed using standard PVT methods and gas chromatograph. The compositions of fluids obtained from the tests were not analyzed.

To predict CO2 – MMP of both oils, the slim tube test methods were carried out at various pressure levels, and at temperature of 55°C and 85°C for Cepu stock tank oil, and at 100°C for East Kalimantan recombined oil.

From the results of the experiment some conclusions may be drawn.

(a) For the oils considered, the CO2 – MMP's were predicted to be 125.0 bars @ 55°C, 235.0 bars @ 85°C, and 252.5 bars @ 100°C, for Cepu stock tank oil and East Kalimantan recombined oil respectively.

(b) The CO2 – MMP's obtained from the experiment were compared with the correlations of both Holm-Josendal and Yellig-Metcalfe. Agreement with the former was the better of those two, though neither correlation was a good predictor of MMP for the oils tested.

(c) The temperature has a significant effect on the CO2 – MMP by about 2.7 bars/°C.


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