川东南页岩气井压裂参数对开发效果的影响——以LP-133HF井为例

摘要/Abstract

摘要：

以川东南中深—深层超压页岩气藏中LP-133HF井为研究对象,在压裂设计前,利用CMG软件建立单井数值模型,模拟水平井压裂参数敏感性,分析潜在的增产因素。研究表明,裂缝导流性、裂缝半长、压裂段长、井距等四个参数对页岩气井开发的影响最大,而单段长影响最小且为负相关性。得出了一套适合LP-133HF井的压裂参数,现场压后评价参数可信,该分析方法可靠,可指导压裂设计,有一定的推广意义。

关键词: 页岩气, 增产分析, CMG, 压裂参数, 导流能力

Abstract:

Before the design of the horizontal wells' fracture, we took the well LP-133HF in the half deep to deep layer of the overpressure shale gas reservoir in southeast Sichuan basin as the research object. And by the software--CMG, we established the numerical model of the single well to simulate the sensibility of the fracture parameters of the horizontal wells and analyze the potential production promoting factors. The results showed that four factors, that is, the fracture conductivity, fracture half length, fracturing length and well spacing, affected most on the development of the shale gas wells, while the single fracturing length had the minimal effect and negative correlation. Finally, we obtained a set of fracturing parameters suitable for well LP-133HF, which is proved to be credible in field application. This analysis method is reliable and applicable for the guidance of the fracturing design. It has certain promotion significance.

Key words: shale gas, production analysis, CMG, fracturing parameter, fracture conductivity

中图分类号:

TE37

刘欣,张莉娜,张耀祖. 川东南页岩气井压裂参数对开发效果的影响——以LP-133HF井为例[J]. 油气藏评价与开发, 2018, 8(5): 77-80.

Xin Liu,Lina Zhang,Yaozu Zhang. Influence of fracturing parameters on development effects of shale gas wells in southeast Sichuan basin: A case of well LP-133HF[J]. Reservoir Evaluation and Development, 2018, 8(5): 77-80.

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参考文献 7

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裂缝导流系数F_CD/（10^-3μm²·m）	裂缝半长/m	单段长/m	压裂段长/m	井距/m—比例配产	井距/m—同配产
0.01	10	40	600	200	200
0.05	30	60	800	300	300
0.1	50	80	1 000	400	400
0.5	70	100	1 200	500	500
1.0	90	120	1 400	600	600
1.5	110	140	1 600	700	700
2.0	130	160	1 800	800	800

参数	取值	累产气量 /(10⁷m³)	平均日产气量 /(10⁴m³·d^-1)	稳产时间/d	采出程度,%
导流系数F_CD/（10^-3μm²·m）	0.001	74.61	1.36	5	13.93
	0.05	74.80	1.37	21	13.97
	0.1	76.65	1.40	45	14.31
	0.5	92.15	1.68	73	17.21
	1.0	159.37	2.91	152	29.76
	1.5	224.06	4.09	669	41.84
	2.0	243.84	4.45	988	45.54

参数	取值	累产气量/(10⁷m³)	平均日产气量/(10⁴m³·d^-1)	稳产时间/ d	采出程度, %
裂缝半长x_f/m	10	98.33	1.79	7	18.36
	30	126.65	2.31	20	23.65
	50	158.75	2.90	181	29.65
	70	184.97	3.38	365	34.54
	90	209.76	3.83	546	39.17
	110	231.92	4.23	790	43.31
	130	247.14	4.51	988	46.15

参数	取值	累产气量/(10⁷m³)	平均日产气量/(10⁴m³·d^-1)	稳产时间/ d	采出程度, %
单段长/m	40	276.09	5.04	1 905	46.40
	60	274.99	5.02	1 876	46.22
	80	273.90	5.00	1 826	46.04
	100	271.40	4.95	1 800	45.61
	120	266.65	4.87	1 492	44.82
	140	256.94	4.69	1 339	43.19
	160	242.96	4.44	943	40.83

参数	取值	累产气量/(10⁷m³)	平均日产气量/(10⁴m³·d^-1)	稳产时间/d	采出程度, %
压裂段长/m	600	127.57	2.33	10	19.85
	800	168.38	3.07	212	26.20
	1 000	205.50	3.75	546	31.98
	1 200	237.00	4.33	882	36.88
	1 400	260.64	4.76	1 271	40.56
	1 600	273.17	4.98	1 734	42.51
	1 800	273.90	5.00	1 826	42.63