重庆武隆五峰组—龙马溪组一段天生剖面特征研究

doi:10.13809/j.cnki.cn32-1825/te.2022.01.013

摘要/Abstract

摘要：

以页岩储层作为切入点,通过对涪陵、南川、武隆地区构造简单、露头发育好、地层发育全、交通便利区进行踏勘优选,选择天生标准剖面作为研究对象。对天生剖面进行取样分析,结合已有的地震、钻井、测井与分析化验等资料,开展了地层沉积特征、矿物岩石学特征、有机地化特征、储集空间特征等方面研究。研究结果表明,该剖面处于构造相对稳定区,各小层发育特征明显,厚度变化不大,具有良好的横向可对比性,是一条具有代表性、典型性的观察研究剖面,可作为川渝地区页岩科研教学实验参考基地。同时,讨论提出了斑脱岩夹层的发育,对页岩品质及页岩气井压裂改造存在一定的影响,通过地面指示地下,为页岩气井的高效开发具有了一定指导意义。

关键词: 页岩储层, 高效开发, 五峰组—龙马溪组一段, 天生标准剖面, 武隆地区

Abstract:

Taking the shale reservoir as the starting point, Tiansheng standard section is selected as the research object by the survey and optimization of the areas with simple structure, well-developed outcrops, fully developed strata and convenient transportation in Fuling, Nanchuan and Wulong areas. The shale heterogeneity of the outcrop is characterized in the aspect of stratigraphy, mineralogy, petrography, organic geochemistry and storage space, combined with pre-existing seismic, drilling,logging, and laboratory petrophysical and geochemical analyses. The research results show that this section is located in an area of relative stable structure has good horizontal comparability, of which each small layer has typical development characteristics and the thickness changes little. It is a representative and typical observation and research section, which can be used as a reference base for shale scientific research and teaching in Sichuan and Chongqing Region. Meanwhile, it is pointed out that the development of bentonite interlayer has a certain influence on shale quality and shale gas well fracturing. This method of the surface indicating the underground provides a certain guiding significance for the efficient development of shale gas wells.

Key words: shale reservoir, efficient development, Wufeng Formation-1st member of Longmaxi Formation, Tiansheng standard outcrop, Wulong area

中图分类号:

TE132

湛小红,陈学辉,刘超等. 重庆武隆五峰组—龙马溪组一段天生剖面特征研究[J]. 油气藏评价与开发, 2022, 12(1): 150-159.

Xiaohong ZHAN,Xuehui CHEN,Chao LIU, et al. Characteristics of Tiansheng Outcrop in Wufeng Formation- 1st Member of Longmaxi Formation, Wulong, Chongqing[J]. Reservoir Evaluation and Development, 2022, 12(1): 150-159.

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层位	样品编号	岩性	平均矿物含量（%）
层位	样品编号	岩性	黏土	石英	钾长石	斜长石	菱铁矿	黄铁矿
五峰组	WLJL-02	炭质硅质灰岩	27.00	64.00	0	3.00	0	6.00
	WLJL-03	硅质页岩	28.20	66.60	1.10	3.30	0.80	0
	WLJL-04	硅质页岩	18.90	79.50	0	1.60	0	0
	WLJL-05-1	硅质页岩	34.90	60.60	1.00	3.50	0	0
	WLJL-05-2	硅质页岩	23.00	74.70	0	2.30	0	0
	WLJL-06	硅质页岩	19.00	78.60	0	2.40	0	0
	WLJL-07	硅质页岩	18.40	79.60	0	2.00	0	0
	WLJL-08	硅质页岩	20.50	73.30	0	2.30	0	3.90
	WLJL-09	硅质页岩	24.80	69.80	0	2.50	0	2.90
平均			23.86	71.86	0.23	2.54	0.09	1.42
龙马溪组一段	WLJL-11	硅质页岩	31.00	61.50	2.40	5.10	0	0
	WLJL-12	硅质页岩	22.00	65.50	3.90	5.50	0	3.10
	WLJL-13-1	硅质页岩	31.30	62.20	1.80	4.70	0	0
	WLJL-13-2	硅质页岩	28.90	63.30	2.50	5.30	0	0
	WLJL-14	含泥硅质页岩	28.90	66.40	1.30	3.40	0	0
	WLJL-15	含泥硅质页岩	34.00	60.80	1.70	3.50	0	0
	WLJL-16	含泥硅质页岩	30.40	63.20	2.80	3.60	0	0
	WLJL-17	含硅炭质泥岩	34.80	59.30	4.00	1.90	0	0
平均			30.16	62.78	2.55	4.13	0	0.39

相	亚相	微相	分布小层
滨外陆棚	深水陆棚	深水混积陆棚	9
		深水硅泥质陆棚	2—8、10—11、13、15—16
		深水砂泥质陆棚	1、12、14

层位	样品编号	岩性	厚度（m）	TOC（%）
五峰组	WLJL-02	炭质硅质灰岩	9.66	5.20
	WLJL-03	硅质页岩		3.26
	WLJL-04	硅质页岩		3.58
	WLJL-05-1	硅质页岩		3.75
	WLJL-05-2	硅质页岩		4.00
	WLJL-06	硅质页岩		3.45
	WLJL-07	硅质页岩		3.76
	WLJL-08	硅质页岩		4.90
	WLJL-09	硅质页岩		4.34
龙马溪组一段	WLJL-11	硅质页岩	15.03	5.50
	WLJL-12	硅质页岩		5.94
	WLJL-13-1	硅质页岩		5.59
	WLJL-13-2	硅质页岩		4.07
	WLJL-14	含泥硅质页岩		3.68
	WLJL-15	含泥硅质页岩		4.60
	WLJL-16	含泥硅质页岩		3.73
	WLJL-17	含硅炭质泥岩		1.10

层位	样品编号	岩性	距底深度（m）	样品数量	分组	测点数	R_b （%）	R_o （%）
五峰组	WLJL-05-1	硅质页岩	5.96	1	2.3-3.5	23	2.76	2.19
龙马溪组一段	WLJL-13-1	硅质页岩	14.94	1	2.1-2.7	21	2.44	1.98