An improved oil recovery prediction method for volatile oil reservoirs

LU Kefeng,SU Chang,CHENG Chaoyi

Table 1 PVT characteristics of the experiment for typical oil.

Sample	Pressure/ MPa	Several degassing				Constant Volume Depletion			Single degassing
Sample	Pressure/ MPa	Solution GOR/ (m³·m^-3)	Oil FVF	Liquid viscosity/ (mPa·s)	Gas viscosity/ (mPa·s)	Condensate- gas ratio/ (cm³·m^-3)	Gas FVF	Liquid saturation/ %	Solution GOR/ (m³·m^-3)	Oil FVF
1	40.51	1 093	5.230 5	0.057 0				100.00	761.10	3.662 8
	34.32	336	2.123 5	0.125 0	0.025 9	502	0.004 690	45.81
	28.48	240	1.979 5	0.175 0	0.023 9	379	0.005 240	36.74
	22.56	169	1.787 1	0.218 0	0.021 1	295	0.006 220	33.52
	16.75	116	1.630 0	0.258 0	0.017 7	252	0.008 190	28.43
	9.83	66	1.487 1	0.306 0	0.016 2	231	0.013 980	25.03
2	40.02	763	3.660 0	0.063 0				100.00	563.42	2.710 6
	35.00	363	2.280 0	0.110 9	0.034 9	525	0.004 604	64.51
	30.00	232	1.820 0	0.153 1	0.028 8	423	0.005 068	50.46
	25.00	159	1.590 0	0.194 5	0.024 5	349	0.005 877	44.63
	20.00	110	1.430 0	0.240 1	0.021 7	292	0.007 178	42.05
	15.00	73	1.320 0	0.294 6	0.019 7	247	0.009 454	40.07
	10.00	44	1.230 0	0.363 1	0.018 1	214	0.014 219	36.11
3	32.39	518	2.754 0	0.133 3	0.031 5			100.00	448.21	2.391 4
	27.57	325	2.093 0	0.173 0	0.026 5	379	0.005 060	75.14
	24.81	267	1.905 0	0.196 1	0.024 4	324	0.005 450	69.21
	20.67	198	1.686 0	0.233 5	0.022 0	260	0.006 320	63.28
	16.53	148	1.534 0	0.276 7	0.020 2	216	0.007 750	57.24
	12.40	108	1.413 0	0.328 2	0.018 9	193	0.010 210	53.55
	8.26	72	1.305 0	0.391 1	0.017 6	190	0.015 100	49.34
4	30.72	345	2.000 0	0.150 7				100.00	319.65	1.840 2
	27.64	271	1.820 0	0.172 2	0.026 6	346	0.004 130	90.50
	25.06	234	1.680 0	0.192 8	0.024 7	308	0.004 450	85.11
	17.89	158	1.490 0	0.262 6	0.020 6	230	0.006 030	74.06
	11.94	105	1.360 0	0.334 6	0.018 7	199	0.009 140	69.20
	4.71	48	1.220 0	0.439 3	0.018 1	197	0.024 530	63.43
5	26.55	159	1.500 0	0.160 0				100.00	156.37	1.484 3
	20.00	126	1.450 0	0.210 0	0.015 0	76	0.006 210	96.82
	15.00	93	1.410 0	0.270 0	0.014 8	48	0.008 160	94.09
	10.00	61	1.350 0	0.360 0	0.014 5	31	0.012 140	90.05
	5.00	30	1.250 0	0.540 0	0.014 1	22	0.024 240	83.42