四川盆地华蓥山五峰组—龙马溪组剖面特征及其勘探意义

doi:10.13809/j.cnki.cn32-1825/te.2022.01.005

Abstract

Abstract:

In recent years, the exploration of Longmaxi Formation in Sichuan Basin has been successful, but the shale gas of the complex structural belt’s Longmaxi Formation are still the next areas for exploration. Therefore, it is necessary to carry out systematic researches on the Sanbaiti section in Mount Huaying of high-steep structural belt in Sichuan Basin, so as to provide ideas for the further exploration breakthrough. The section’s lithology, paleontology, mineral composition, geochemical characteristics, pore type and structure are studied, and compared with the drilling wells of adjacent areas. The findings are as follows. ①The outcrop in Mount Huaying section is well exposed. The shale strata from Wufeng Formation to the bottom of Longmaxi Formation are complete and continuous. Wufeng Formation is divided into two sections, and the Longmaxi Formation（no top） is divided into three sections. The WF2-LM9 graptolite biozone is well developed. From the bottom to the top, the sedimentary environment changed from reduction to oxidation, and the biogenic siliceous environment has been destroyed. The injection amount of terrigenous debris increases, and the abundance of organic matter shows a downward trend. The organic matter in Long-1 member of Wufeng Formation is relatively rich, and the content of brittle minerals is high. The reservoir space is dominated by organic pores, followed by inorganic pores and microfractures. The pore structure is dominated by ink bottles, and a small amount of slit pores. ②For the Hirnantian-Rhuddanian, although the Sanbaiti section of Mount Huaying is located in the deep-water shelf zone in southern Sichuan, the underwater highland micro-paleogeomorphology is locally developed. Due to the influence of undercurrent and other factors, the deposition thickness of organic-rich shale is thin. So that, the micro-paleogeomorphology has an important influence on the material basis of shale gas formation, which can provide ideas for the further evaluation of Longmaxi Formation. ③The formation of organic-rich shale reservoirs in Long-1 member of Wufeng Formation is mainly controlled by the combined action of volcanism, source supply and reduction environment.

Key words: stratigraphic section, graptolite biozone, bentonite, Longmaxi Formation, Mount Huaying

CLC Number:

TE121.1

Liang XIONG,Xiaoxia DONG,Yong ZHAO, et al. Characteristics and exploration significance of Wufeng-Longmaxi Formation stratigraphic section in Mount Huaying, Sichuan Basin[J]. Reservoir Evaluation and Development, 2022, 12(1): 58-67.

Figures/Tables 10

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Table 1

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Table 2

References 16

[1]	马永生, 蔡勋育, 赵培荣. 中国页岩气勘探开发理论认识与实践[J]. 石油勘探与开发, 2018, 45(4):561-574.
	MA Yongsheng, CAI Xunyu, ZHAO Peirong. China's shale gas exploration and development: Understanding and practice[J]. Petroleum Exploration and Development, 2018, 45(4):561-574.
[2]	邹才能, 赵群, 董大忠, 等. 页岩气基本特征、主要挑战与未来前景[J]. 天然气地球科学, 2017, 28(12):1781-1796.
	ZOU Caineng, ZHAO Qun, DONG Dazhong, et al. Geological characteristics, main challenges and future prospect of shale gas[J]. Natural Gas Geoscience, 2017, 28(12):1781-1796.
[3]	郭彤楼. 中国式页岩气关键地质问题与成藏富集主控因素[J]. 石油勘探与开发, 2016, 43(3):317-326.
	GUO Tonglou. Key geological issues and main controls on accumulation and enrichment of Chinese shale gas[J]. Petroleum Exploration and Development, 2016, 43(3):317-326.
[4]	何江林, 王剑, 余谦, 等. 外源补给型页岩气的发现及油气地质意义[J]. 石油学报, 2018, 39(1):12-22.
	HE Jianglin, WANG Jian, YU Qian, et al. Discovery of exogenous type shale gas and its geological significance to hydrocarbon exploration[J]. Acta Petrolei Sinica, 2018, 39(1):12-22.
[5]	陈旭, 樊隽轩, 王文卉, 等. 黔渝地区志留系龙马溪组黑色笔石页岩的阶段性渐进展布模式[J]. 中国科学, 2017, 47(6):720-732.
	CHEN Xu, FAN Juanxuan, WANG Wenhui, et al. Stage-progressive distribution pattern of the Lungmachi black graptolitic shales from Guizhou to Chongqing, Central China[J]. Scientia Sinice(Terrae), 2017, 47(6):720-732.
[6]	梁峰. 中上扬子地区五峰组一龙马溪组页岩气富集模式及有利区优选评价[D]. 徐州:中国矿业大学, 2018.
	LIANG Feng. The research on shale gas enrichment pattern and the favorable area optimizing of Wufeng-Longmaxi shale in middle and upper[D]. Xuzhou: China University of Mining and Technology, 2018.
[7]	方少仙, 侯方浩, 李凌, 等. 四川华蓥山以西石炭系黄龙组沉积环境的再认识[J]. 海相油气地质, 2000, 5(1-2):158-166.
	FANG Shaoxian, HOU Fanghao, LI Ling, et al. Understanding of Carboniferous Huanglong Formation sedimentary environment in the west of Huaying Mountain, Sichuan Province[J]. Marine Petroleum Geology Origin, 2000, 5(1-2):158-166.
[8]	杜伟, 胡宗全, 刘光祥, 等. 四川盆地及周缘上奥陶统五峰组岩相特征[J]. 石油实验地质, 2020, 42(3):398-404.
	DU Wei, HU Zongquan, LIU Guangxiang, et al. Lithofacies of Upper Ordovician Wufeng Formation in Sichuan Basin and its periphery[J]. Petroleum Geology & Experiment, 2020, 42(3):398-404.
[9]	张柏桥, 孟志勇, 刘莉, 等. 四川盆地涪陵地区五峰组观音桥段成因分析及其对页岩气开发的意义[J]. 石油实验地质, 2018, 40(1):30-37.
	ZHANG Boqiao, MENG Zhiyong, LIU Li, et al. Significance of shale gas genesis to the development of Guanyinqiao Member, Wufeng Formation, Fuling area, Sichuan Basin[J]. Petroleum Geology & Experiment, 2018, 40(1):30-37.
[10]	邓义楠, 王约, 陈洪德, 等. 黔北桐梓五峰组观音桥段双壳类和腹足类的生态意义[J]. 地层学杂志, 2010, 34(3):328-333.
	DENG Yinan, WANG Yue, CHEN Hongde, et al. Bivalves and gastropods from the Ordovician Guanyinqiao member of the Wufeng formation in Tongzi, Guizhou, south China, and their ecological significance[J]. Journal of Stratigraphy, 2010, 34(3):328-333.
[11]	葛祥英. 四川盆地东部奥陶一志留纪交替时期事件沉积与有机质富集[D]. 北京:中国地质大学, 2020.
	GE Xiangying. The events across the Ordovician-Silurian transition and the organic enrichment of black shales in the east of Sichuan Basin[D]. Beijing: China University of Geosciences, 2020.
[12]	TRIBOVILLARD N, ALGEO T J, LYONS T. Trace metals as paleoredox and paleoproductivity proxies: An update[J]. Chemistry Geology, 2006, 232(1-2):12-32.
[13]	梁峰, 王红岩, 拜文华, 等. 川南地区五峰组—龙马溪组页岩笔石带对比及沉积特征[J]. 天然气工业, 2017, 37(7):20-26.
	LIANG Feng, WANG Hongyan, BAI Wenhua, et al. Graptolite correlation and sedimentary characteristics of Wufeng-Longmaxi shale in southern Sichuan Basin[J]. Natural Gas Industry, 2017, 37(7):20-26.
[14]	聂海宽, 金之钧, 马鑫, 等. 四川盆地及邻区上奥陶统五峰组—下志留统龙马溪组底部笔石带及沉积特征[J]. 石油学报, 2017, 38(2):160-174.
	NIE Haikuan, JIN Zhijun, MA Xin, et al. Graptolites zone and sedimentary characteristics of Upper Ordovician Wufeng Formation-Lower Silurian Longmaxi Formation in Sichuan Basin and its adjacent areas[J]. Acta Petrolei Sinica, 2017, 38(2):160-174.
[15]	陈旭, 樊隽轩, 张元动, 等. 五峰组及龙马溪组黑色页岩在扬子覆盖区内的划分与圈定[J]. 地层学杂志, 2015, 39(4):351-358.
	CHEN Xu, FAN Junxuan, ZHANG Yuandong, et al. Subdivision and delineation of the Wufeng and Lungmachi black shales in the subsurface areas of the Yangtze Platform[J]. Journal of Stratigraphy, 2015, 39(4):351-358.
[16]	王同, 张克银, 熊亮, 等. 四川自贡地区五峰组—龙马溪组下段古地貌刻画及其油气意义[J]. 石油实验地质, 2018, 40(6):764-770.
	WANG Tong, ZHANG Keyin, XIONG Liang, et al. Paleogeomorphology restoration of Wufeng Formation-Lower Member of Longmaxi Formation in Zigong area of Sichuan Province and its oil and gas significance[J]. Petroleum Geology & Experiment, 2018, 40(6):764-770.

层号	岩性及典型特征描述	层厚（m）
	龙马溪组（S₁l）厚度62.1 m,未见顶
26	灰绿色页岩,层理发育	8.08
25	浅灰色粉砂质页岩,局部见风化铁质结核	5.83
24	灰绿色粉砂质页岩与灰色粉砂岩互层,粉砂质页岩呈薄层状, 层厚3~8 cm,粉砂岩多呈中层状	2.35
23	灰绿色薄—中层粉砂质页岩,单层厚5 mm,见球状风化	1.03
22	灰色粉砂质页岩,自下而上颜色由灰色变为浅灰色	4.28
21	灰绿色泥岩与深灰色粉砂质页岩互层,互层比1:1,层厚4 cm	6.40
20	深灰色页岩夹灰绿色薄层泥岩,从底至顶,粉砂含量逐渐增加	5.23
19	深灰色粉砂质页岩	13.12
18	深灰色粉砂质页岩	4.68
17	灰黑色页岩,富含笔石	2.94
16	薄—中层状黑色粉砂质页岩,偶夹黑色纹层	1.72
15	黑色中—薄层状粉砂质页岩	0.56
14	黑色薄层状碳质页岩夹粉砂质页岩薄层,纹层发育	3.11
13	黑色薄层状页岩,富含笔石,层厚3~4 cm	0.39
12	黑色中层含粉砂页岩,层厚4~5 cm	1.39
11	黑薄—中层碳质页岩	0.97
10	灰黑色含粉砂页岩,顶发育1层斑脱岩	0.29
9	黑色中厚层页岩,层厚5~20 cm,见球状风化,大小70 cm×15 cm	0.43
8	黑色碳质页岩,中层状层理,厚5~10 cm	0.37
	五峰组（O₃w）厚度5.4 m
7	灰色含介壳粉砂岩	0.22
6	中—厚层状硅质页岩,层厚12 cm,中层2~5 cm	1.59
5	斑脱岩	0.01
4	黑色薄—中层状碳质页岩,富含笔石,底部见擦痕,少量方解石充填	1.69
3	黑色中层状页岩,页理发育,层厚10 cm	0.84
2	黑色薄层状页岩,页理发育,发育少量笔石,该层发育4条斑脱岩。	1.05
	临湘组（O₃l）厚度1.22 m
1	灰色泥质灰岩	1.22
	宝塔组（O₂b）厚度2.89 m
0	浅灰色龟裂纹瘤状灰岩	2.89

剖面	Th/U	TOC（%）	Si_bio（%）	Ba_bio（%）	Zr/Al	Si/Al	Ti/Al
LM7-LM9剖面顶	3.477	0.836	3.029	0.068	0.007	4.113	0.032
WF2-LM6	1.173	3.937	4.982	0.115	0.005	5.5	0.008

Characteristics and exploration significance of Wufeng-Longmaxi Formation stratigraphic section in Mount Huaying, Sichuan Basin

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