川南寒武系筇竹寺组勘探潜力研究

doi:10.13809/j.cnki.cn32-1825/te.2021.01.003

摘要/Abstract

摘要：

川南下寒武统筇竹寺组勘探实践表明,页岩厚度薄且多套叠置,页岩层段测试及试采效果不佳。为进一步落实该区有利勘探目标,实现寒武系筇竹寺组效益开发,开展了系统取心、岩心观察及实验分析。结果表明：①川南下寒武统筇竹寺组发育泥页岩、（泥质）粉砂岩、粉砂质页岩等多种岩性,页岩厚度相对较薄,纵向不连续沉积;②页岩热演化程度过高,储集空间类型以无机孔为主,含粉砂质储层段无机孔也占主导地位;③不同岩性的储层品质相当,均具备储集能力;④钻井揭示位于筇竹寺组中部的含粉砂泥页岩段厚度大、储层物性好、含气性好,是有利目标层段。研究认识对该区拓宽勘探思路具有重要的指导意义。

关键词: 拉张槽, 筇竹寺组, 富有机质页岩, 粉砂质泥页岩, 无机孔

Abstract:

The exploration of the lower Cambrian Qiongzhusi Formation in southern Sichuan Basin shows that the shale is thin with multiple strata series, which restricts the effects of testing and pilot production. In order to further implement the favorable exploration targets and realize the benefit development of the Cambrian Qiongzhusi Formation, systematic coring, core observation and experimental analysis have been carried out. The results show that: ①Shale,siltstone（or argillaceous siltstone）, silty shale and other lithology develop in the lower Cambrian Qiongzhusi Formation in southern Sichuan Basin. Shale is relatively thin with longitudinal discontinuous deposition. ②The thermal evolution degree of shale is too high. The reservoir spaces are mainly inorganic pores, meanwhile, inorganic pores are also dominant in silty reservoir section. ③The reservoir quality of various types of lithologic combination section are similar, and they all have storage capacity. ④Drilling reveals that the siltstone-bearing shale in the middle of Qiongzhusi formation is thick with good physical and gas-bearing property, which is the favorable target interval. The research and understanding is of great significance to broaden the exploration ideas in this area.

Key words: intracratonic sag, Qiongzhusi Formation, organic-rich shale, siltstone-bearing shale, inorganic pore

中图分类号:

TE122

熊亮,葛忠伟,王同等. 川南寒武系筇竹寺组勘探潜力研究[J]. 油气藏评价与开发, 2021, 11(1): 14-21.

Liang Xiong,Zhongwei Ge,Tong Wang, et al. Exploration potential of Cambrian Qiongzhusi Formation in southern Sichuan Basin[J]. Reservoir Evaluation and Development, 2021, 11(1): 14-21.

图/表 17

图1

图2

表1

图3

表2

图4

图5

表3

表4

图6

表5

图7

图8

图9

图10

图11

表6

参考文献 22

[1]	赵建华, 金之钧, 杨畅松, 等. 上扬子地区下寒武统筇竹寺组页岩沉积环境[J]. 石油与天然气地质, 2019,40(4):701-715.
	Zhao Jianhua, Jin Zhijun, Yang Changsong, et al. Shale sedimentary environment of Lower Cambrian Qiongzhusi formation in Upper Yangtze area[J]. Petroleum and Natural Gas Geology, 2019,40(4):701-715.
[2]	刘忠宝, 高波, 张钰莹, 等. 上扬子地区下寒武统页岩沉积相类型及分布特征[J]. 石油勘探与开发, 2017,44(1):21-31.
	Liu Zhongbao, Gao Bo, Zhang Yuying, et al. Sedimentary facies types and distribution characteristics of Lower Cambrian shale in Upper Yangtze area[J]. Petroleum Exploration and Development, 2017,44(1):21-31.
[3]	李延钧, 赵圣贤, 黄勇斌, 等. 四川盆地南部下寒武统筇竹寺组页岩沉积微相研究[J]. 地质学报, 2013,87(8):1136-1148.
	Li Yanjun, Zhao Shengxian, Huang Yongbin, et al. Sedimentary microfacies of Lower Cambrian Qiongzhusi formation in southern Sichuan Basin[J]. Acta Geologica Sinica, 2013,87(8):1136-1148.
[4]	郭彤楼, 曾萍. 复杂构造区页岩气地质特征、资源潜力与成藏关键因素[M]. 北京: 科学出版社, 2017.
	Guo Tonglou, Zeng Ping. Geological characteristics, resource potential and key factors for shale gas in the tectonically complex region[M]. Beijing: Science Press, 2017.
[5]	高波, 刘忠宝, 舒志国, 等. 中上扬子地区下寒武统页岩气储层特征及勘探方向[J]. 石油与天然气地质, 2020,41(2):284-294.
	Gao Bo, Liu Zhongbao, Shu Zhiguo, et al. Lower Cambrian shale gas reservoir characteristics and exploration direction in the middle and upper Yangtze Region[J]. Petroleum and Natural Gas Geology, 2020,41(2):284-294.
[6]	王同, 熊亮, 徐猛, 等. 川南地区下寒武统筇竹寺组页岩储层特征[J]. 石油实验地质, 2016,38(2):197-210. doi: 10.11781/sysydz201602197
	Wang Tong, Xiong Liang, Xu Meng, et al. Shale reservoir characteristics of Lower Cambrian Qiongzhusi formation in southern Sichuan[J]. Petroleum Experimental Geology, 2016,38(2):197-210. doi: 10.11781/sysydz201602197
[7]	董晓霞, 熊亮. 川南筇竹寺组页岩储集空间类型及发育影响因素[J]. 物探化探计算技术, 2016,38(3):415-422.
	Dong Xiaoxia, Xiong Liang. Shale reservoir space types and development influencing factors of Qiongzhusi formation in southern Sichuan[J]. Geophysical and Geochemical Calculation Technology, 2016,38(3):415-422.
[8]	江强, 朱传庆, 邱楠生, 等. 川南地区热史及下寒武统筇竹寺组页岩热演化特征[J]. 天然气地球科学, 2015,26(8):1563-1570. doi: 10.11764/j.issn.1672-1926.2015.08.1563
	Jiang Qiang, Zhu Chuanqing, Qiu Nansheng, et al. Thermal history of southern Sichuan and thermal evolution characteristics of Lower Cambrian Qiongzhusi formation shale[J]. Natural Gas Geoscience, 2015,26(8):1563-1570. doi: 10.11764/j.issn.1672-1926.2015.08.1563
[9]	王道富, 王玉满, 董大忠, 等. 川南下寒武统筇竹寺组页岩储集空间定量表征[J]. 天然气工业, 2013,33(7):1-10. doi: 10.3787/j.issn.1000-0976.2013.07.001
	Wang Daofu, Wang Yuman, Dong Dazhong, et al. Quantitative characterization of shale reservoir space of Lower Cambrian Qiongzhusi formation in southern Sichuan[J]. Natural Gas Industry, 2013,33(7):1-10. doi: 10.3787/j.issn.1000-0976.2013.07.001
[10]	祝彦贺, 张道旻, 陈桂华, 等. 上扬子地区龙马溪组与筇竹寺组的差异性分析[J]. 西安石油大学学报(自然科学版), 2016,31(4):18-24.
	Zhu Yanhe, Zhang Daomin, Chen Guihua, et al. Difference analysis of Longmaxi formation and Qiongzhusi formation in Upper Yangtze Region[J]. Journal of Xi’an Shiyou University(Natural Science Edition), 2016,31(4):18-24.
[11]	刘忠宝, 冯动军, 高波, 等. 上扬子地区下寒武统高演化页岩微观孔隙特征[J]. 天然气地球科学, 2017,28(7):1096-1107.
	Liu Zhongbao, Feng Dongjun, Gao Bo, et al. Micro pore characteristics of the lower Cambrian high evolution shale in the upper Yangtze Region[J]. Natural Gas Geoscience, 2017,28(7):1096-1107.
[12]	周文, 徐浩, 余谦, 等. 四川盆地及其周缘五峰组—龙马溪组与筇竹寺组页岩含气性差异及成因[J]. 岩性油气藏, 2016,28(5):18-25.
	Zhou Wen, Xu Hao, Yu Qian, et al. Shale gas bearing difference and genesis of Wufeng Longmaxi formation and Qiongzhusi formation in Sichuan Basin and its periphery[J]. Lithologic Oil and Gas Reservoir, 2016,28(5):18-25.
[13]	王淑芳, 张子亚, 董大忠, 等. 四川盆地下寒武统筇竹寺组页岩孔隙特征及物性变差机制探讨[J]. 天然气地球科学, 2016,27(9):1619-1628. doi: 10.11764/j.issn.1672-1926.2016.09.1619
	Wang Shufang, Zhang Ziya, Dong Dazhong, et al. Pore characteristics and physical property variation mechanism of Lower Cambrian Qiongzhusi formation shale in Sichuan Basin[J]. Natural Gas Geoscience, 2016,27(9):1619-1628. doi: 10.11764/j.issn.1672-1926.2016.09.1619
[14]	江凯禧, 彭丽, 何文祥, 等. 页岩气储层非均质性研究——以四川盆地下寒武统筇竹寺组为例[J]. 海洋地质前沿, 2014,30(8):47-54.
	Jiang Kaixi, Peng Li, He Wenxiang, et al. Heterogeneity of shale gas reservoir: a case study of Lower Cambrian Qiongzhusi formation in Sichuan Basin[J]. Marine Geology Frontier, 2014,30(8):47-54.
[15]	刘忠宝, 高波, 武清钊, 等. 页岩有机-无机复合型孔隙及其控气作用——以川西南地区筇竹寺组为例[J]. 海相油气地质, 2018,23(4):42-50.
	Liu Zhongbao, Gao Bo, Wu Qingzhao, et al. Organic inorganic composite pores in shale and their gas control: a case study of Qiongzhusi formation in Southwest Sichuan[J]. Marine Petroleum Geology, 2018,23(4):42-50.
[16]	谢丹, 韩书勇, 周伟韬, 等. 井研—犍为地区筇竹寺组页岩气保存条件研究[J]. 天然气技术与经济, 2018,12(2):24-27.
	Xie Dan, Han Shuyong, Zhou Weitao, et al. Study on shale gas preservation conditions of Qiongzhusi formation in Jingyan Qianwei area[J]. Natural Gas Technology and Economy, 2018,12(2):24-27.
[17]	刘犟, 张克银. 四川盆地井研地区麦地坪—筇竹寺组高分辨率层序地层特征[J]. 成都理工大学学报(自然科学版), 2018,45(5):585-593.
	Liu Jiang, Zhang Keyin. High resolution sequence stratigraphy of maidiping-qiongzhusi formation in Jingyan area, Sichuan Basin[J]. Journal of Chengdu University of Technology(Natural Science Edition), 2018,45(5):585-593.
[18]	刘犟, 张克银. 井研—犍为地区麦地坪组—筇竹寺组沉积相特征[J]. 科学技术与工程, 2018,18(2):20-25.
	Liu Jiang, Zhang Keyin. Sedimentary facies characteristics of maidiping and Qiongzhusi formation in Jingyan Qianwei area[J]. Science and Technology and Engineering, 2018,18(2):20-25.
[19]	汪泽成, 姜华, 王铜山, 等. 四川盆地桐湾期古地貌特征及成藏意义[J]. 石油勘探与开发, 2014,41(3):305-312.
	Wang Zecheng, Jiang Hua, Wang Tongshan, et al. Paleogeomorphic characteristics and hydrocarbon accumulation significance of Tongwan period in Sichuan Basin[J]. Petroleum Exploration and Development, 2014,41(3):305-312.
[20]	田兴旺, 胡国艺, 苏桂萍, 等. 川南威远地区W201井古生界海相页岩矿物特征[J]. 新疆石油地质, 2018,39(4):409-415.
	Tian Xingwang, Hu Guoyi, Su Guiping, et al. Mineral characteristics of Paleozoic marine shale from well W201 in Weiyuan area, southern Sichuan[J]. Petroleum Geology of Xinjiang, 2018,39(4):409-415.
[21]	任东超, 王晓飞, 刘冬冬, 等. 威远地区筇竹寺组选区评价标准及有利勘探区预测[J]. 非常规油气, 2017,4(5):38-43.
	Ren Dongchao, Wang Xiaofei, Liu Dongdong, et al. Evaluation criteria and favorable exploration area prediction of Qiongzhusi formation in Weiyuan area[J]. Unconventional Oil and Gas, 2017,4(5):38-43.
[22]	刘斌, 付育武. JY1HF井筇竹寺组页岩气体积压裂实践[J]. 复杂油气藏, 2016,9(3):69-73.
	Liu Bin, Fu Yuwu. Volume fracturing practice of shale gas in Qiongzhusi Formation of JY1 HF well[J]. Complex Oil and Gas Reservoirs, 2016,9(3):69-73.

层	岩性	脆性矿物（%）	黏土矿物（%）
Ⅴ	黑色页岩	58	29
Ⅳ	粉砂质页岩与泥质粉砂岩互层	55.1~62.7	36.1~43.8
Ⅲ	黑色页岩	64	33
Ⅲ	泥质粉砂岩、粉砂质页岩	68.4~71.1	27.4~30.4
Ⅱ	黑色页岩	46	47
Ⅰ	粉砂质页岩与泥质粉砂岩互层	44.0~66.5	26.4~50.0

层	岩性	厚度（m）	TOC（%）
Ⅴ	黑色页岩	5.0~15.5	2.18
Ⅳ	粉砂质页岩与泥质粉砂岩互层	150~180	0.4~0.8
Ⅲ	黑色页岩	0~5.5	1.05
Ⅲ	泥质粉砂岩、粉砂质页岩	80~90	1.0~1.7
Ⅱ	黑色页岩	4~15	1.61
Ⅰ	粉砂质页岩与泥质粉砂岩互层	70~105	0.7~0.9

层	岩性	厚度（m）	渗透率（10^-3μm²）	孔隙度（%）
Ⅴ	黑色页岩	5.0~15.5		1.8
Ⅳ	粉砂质页岩与泥质粉砂岩互层	150~180	0.005 3	2.0~2.4
Ⅲ	黑色页岩	0~5.5		2.3
Ⅲ	泥质粉砂岩、粉砂质页岩	80~90	0.004 3	2.5~3.4
Ⅱ	黑色页岩	4~15		3.1
Ⅰ	粉砂质页岩与泥质粉砂岩互层	70~105	0.142 5	1.4~2.2

层	岩性	厚度（m）	含气量（m³/t）
Ⅴ	黑色页岩	5.0~15.5	1.5
Ⅳ	粉砂质页岩与泥质粉砂岩互层	150~180	1.8~2.4
Ⅲ	黑色页岩	0~5.5	2.2
Ⅲ	泥质粉砂岩、粉砂质页岩	80~90	2.7~3.8
Ⅱ	黑色页岩	4~15	1.6
Ⅰ	粉砂质页岩与泥质粉砂岩互层	70~105	1.5~2.4

井号	层位	产量（10⁴ m³/d）	重要构造事件	构造样式	保存条件
井号	层位	产量（10⁴ m³/d）	重要构造事件	构造样式	底板条件	输导体系	压力系数	评价
B201	∈₁q	1.08	桐湾运动（约520 Ma）	盆内背斜	平行不整合		1.01	中
B201-H1	∈₁q	1.00			优质白云岩	不整合面	1.00	中
B201-H3	∈₁q	1.60~2.80			平行不整合	断裂不发育		良
B5	∈₁q	2.46			平行不整合	贯通裂缝发育		差
A1	∈₁q	5.95			平行不整合	断裂不发育	1.51	良