Natural Gas Exploration and Development

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Establishment of “one point method” productivity evaluation formula for overpressured gas reservoirs

CAI Junjun, LIU Wei, ZHOU Fangfang, CHEN Chunzhu

Natural Gas Exploration and Development, 2025, 48(2): 58-68. DOI: 10.12055/gaskk.issn.1673-3177.2025.02.006

井号	p_R/ MPa	p_wf/ MPa	q_g/ (10⁴ m³·d^-1)	井号	p_R/ MPa	p_wf/ MPa	q_g/ (10⁴ m³·d^-1)	井号	p_R/ MPa	p_wf/ MPa	q_g/ (10⁴ m³·d^-1)	井号	p_R/ MPa	p_wf/ MPa	q_g/ (10⁴ m³·d^-1)
1	75.98	75.92	26.18	11	71.52	70.02	71.70	23	76.92	76.56	25.20	DB101-3	80.22	76.19	38.63
		75.92	25.75	11	71.52	69.61	82.00			76.28	38.30	DB101-5	79.66	79.36	13.17
		75.84	48.36	12	67.63	66.75	84.84			76.02	48.50			78.49	22.53
		75.75	62.69			67.17	55.40			75.74	58.10			77.70	31.20
		75.58	83.79			67.06	64.30	24	28.34	28.08	37.20			76.60	47.79
2	75.96	74.76	60.78			66.91	72.10			27.90	53.70	西35-1	42.27	40.52	3.01
		74.34	81.40			66.70	82.50			27.79	60.93			39.73	3.94
		73.79	103.18	13	67.05	66.63	64.00	25	23.97	23.77	71.14			37.81	5.59
		73.36	121.26			66.75	54.40			23.63	91.94			36.36	6.13
3	75.55	75.16	22.85			66.64	65.00			23.55	111.56			38.58	4.41
		74.93	34.88			66.54	75.10	KL203	73.13	72.24	43.08	A	68.80	67.00	7.20
		74.64	50.21			66.44	83.80			70.80	67.20			64.60	11.50
		74.27	65.70	14	63.80	63.68	51.90			69.26	89.69			61.50	15.20
		73.88	79.75			63.64	60.50			66.60	117.94			54.60	20.20
4	75.06	74.82	58.01			63.57	71.90			63.44	136.43	X2	61.81	59.47	55.58
		74.71	77.03			63.52	79.40			54.04	201.00			58.69	77.14
		74.58	95.36	15	61.84	61.02	50.00			65.90	113.48			58.11	88.98
		74.47	118.85			60.61	60.00	KL205	74.51	73.38	69.28			56.80	113.66
5	75.17	74.56	40.50			60.21	70.00			72.48	106.14	KL201	73.59	40.09	34.50
		74.32	49.62			59.69	80.00			71.70	148.57			63.47	15.37
		74.07	59.68	16	62.49	49.90	28.04			70.98	175.43			56.81	21.65
		73.74	74.09			59.84	17.30			70.15	206.21			47.75	30.26
6	74.65	73.47	70.01			58.00	20.98			69.14	244.20			40.14	37.54
		74.20	35.80			55.94	25.03			72.74	108.03			62.89	15.85
		73.93	49.87			53.24	30.42	KL2-10	54.20	53.46	78.69	DB2	89.26	75.67	18.23
		73.58	65.26	17	62.45	60.96	45.18			52.96	117.62			70.84	34.20
		73.21	80.25			61.66	30.40			52.42	151.78			62.70	39.69
7	75.57	56.85	68.66			61.46	38.40	LJ6	41.89	41.84	10.06			54.72	45.50
		68.60	38.90			61.22	45.70			41.79	17.43	DB201	95.83	93.39	35.51
		65.56	50.60			60.95	54.30			41.52	30.54			89.97	60.53
		62.79	59.80	18	74.50	74.43	22.58			41.27	43.52			85.58	83.11
		59.85	68.20			74.41	41.38			41.71	22.14			78.91	110.46
8	72.46	70.08	80.85			74.33	61.74	LJ11H	41.66	41.61	29.97	DB102	88.60	62.67	12.13
		71.72	41.60			74.22	81.35			41.52	64.12			53.45	17.64
		71.24	58.58	19	81.91	62.38	13.08			41.41	92.04			39.90	21.26
		70.66	78.60			54.18	17.26			41.32	111.26			30.35	23.43
		69.97	99.50			52.87	17.78	DB1101	88.73	84.85	17.43	河坝H	111.11	88.92	93.50
9	66.73	65.85	71.25	20	73.20	70.54	12.80			83.54	22.08			78.23	124.80
		66.13	50.60			69.43	16.10			81.50	31.50			68.02	140.38
		65.90	61.50			67.72	20.40			79.34	37.08			61.73	151.18
		65.69	71.11			64.90	23.00	TB401	85.26	75.93	52.14	KL203	73.88	70.64	114.19
		65.47	78.89	21	78.33	71.09	30.62			77.50	45.15			73.68	41.88
10	66.15	59.30	63.00			77.47	9.71			78.21	40.15			73.21	66.11
		62.76	41.60			75.80	19.83			79.50	33.27			72.96	88.09
		61.60	51.30			73.39	30.60			80.55	28.05			72.70	117.95
		60.42	60.30			70.37	40.20	DB1201	84.19	80.98	30.90			71.50	136.43
		58.98	70.40	22	49.39	47.11	8.04			78.71	48.43			69.81	201.00
11	71.52	69.31	81.40			46.01	10.22			79.77	39.67			71.64	113.48
		70.78	51.30			45.17	12.07	DB101-3	80.22	79.07	14.34			71.89	113.35
		70.40	62.00			44.01	14.11	DB101-3	80.22	77.45	30.94

Table 2 Multi-point testing data for 44 gas wells

Other figure/table from this article

Table 1 Burial depth and PVT data of typical overpressured gas fields (reservoirs)
Fig. 1 Relation curves of μZ vs. p and$\frac{p}{\mu Z}$vs. p for typical overpressured gas fields (reservoirs)
Fig. 2 Pressure-squared binomial relation of Well MX8
Fig. 3 Pressure binomial relation of Well MX8
Table 3 Fitting results of binomial productivity equations in pressure-squared and pressure forms for 44 gas wells
Fig. 4 Fitting relations in pressure form between q_D and p_Dof 44 gas wells
Fig. 5 Fitting relations in pressure-squared form between q_D and p_Dof 44 gas wells
Table 4 Comparison of errors in productivity evaluation
Fig. 6 Comparison of errors in productivity calculation for gas wells with small drawdown pressure

模态框（Modal）标题

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