重庆市綦江区页岩地质特征及其对页岩气勘探的启示

doi:10.13809/j.cnki.cn32-1825/te.2022.01.010

摘要/Abstract

摘要：

通过野外剖面观察和实测,对重庆市綦江区安稳镇上奥陶统五峰组—下志留统龙马溪组页岩剖面进行了详细野外描述与实验分析等综合研究,安稳镇页岩剖面自下而上出露五峰组下部黑色硅质页岩、五峰组上部观音桥段深灰色介壳泥质灰岩、龙马溪组黑色页岩等岩性地层。主要有以下3点结论：①出露页岩段为当前勘探开发的主要层段,各项表征成藏条件的评价指标优越,TOC（总有机碳）含量为1.10 %~8.10 %,平均为3.40 %,有机质成熟度（R_o）平均为2.70 %,石英含量为33.90 %~56.60 %,平均为42.36 %,黏土含量为18.00 %~57.20 %,平均为42.62 %;②储集空间类型主要为微裂缝、有机质孔与无机质孔;③结合勘探开发实践,剖面五峰组—龙马溪组下部①—③小层黑色页岩为甜点段,是水平井轨迹有利穿行层段。

关键词: 地质特征, 五峰组—龙马溪组, 甜点段, 安稳镇, 重庆市

Abstract:

Detailed field description and experimental analysis have been carried out for Wufeng-Longmaxi Formation shale profile in Anwen Town, Qijiang, Chongqing, by field profile observations and field measurements. Three kinds of lithology formation, namely black siliceous shale of Wufeng Formation, dark gray shell argillaceous limestone of Guanyinqiao and black shale of Longmaxi Formation,are exposed from bottom to top in shale section of Anwen Town. There are three main conclusions. First, the exposed shale is the main formation of current exploration and development, the indicators of reservoir forming conditions are superior, TOC ranges from 1.10 % to 8.10 %, with an average of 3.40 %. The average R_o is 2.70 %; Quartz content ranges from 33.90 % to 56.60 %, with an average of 42.36 %, and clay content ranges from 18.00 % to 57.20 %, with an average of 42.62 %. Second, the main reservoir space types are microfracture, organic pore and inorganic pore. Third, combined with the exploration and development practice, the ①~③ subzone of black shale at the lower part of Wufeng-Longmaxi Formation is the sweet spot section, which is a favorable target of horizontal well.

Key words: geological characteristic, Wufeng-Longmaxi Formation, sweet spot section, Anwen Town, Chongqing

中图分类号:

TE132

高玉巧,刘娜娜,张培先,何贵松,高全芳. 重庆市綦江区页岩地质特征及其对页岩气勘探的启示[J]. 油气藏评价与开发, 2022, 12(1): 119-129.

GAO Yuqiao,LIU Nana,ZHANG Peixian,HE Guisong,GAO Quanfang. Geological characteristic and its implications of shale exploration in Qijiang, Chongqing, China[J]. Reservoir Evaluation and Development, 2022, 12(1): 119-129.

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参考文献 22

[1]	何希鹏, 何贵松, 高玉巧, 等. 渝东南盆缘转换带常压页岩气地质特征及富集高产规律[J]. 天然气工业, 2018, 38(12):1-14.
	HE Xipeng, HE Guisong, GAO Yuqiao, et al. Geological characteristics and enrichment laws of normal-pressure shale gas in the basin-margin transition zone of SE Chongqing[J]. Natural Gas Industry, 2018, 38(12):1-14.
[2]	何贵松, 何希鹏, 高玉巧, 等. 中国南方3套海相页岩气成藏条件分析[J]. 岩性油气藏, 2019, 31(1):57-68.
	HE Guisong, HE Xipeng, GAO Yuqiao, et al. Analysis of accumulation conditions of three sets of marine shale gas in southern China[J]. Lithologic Reservoirs, 2019, 31(1):57-68.
[3]	郭彤楼, 蒋恕, 张培先, 等. 四川盆地外围常压页岩气勘探开发进展与攻关方向[J]. 石油实验地质, 2020, 42(5):837-845.
	GUO Tonglou, JIANG Shu, ZHANG Peixian, et al. Progress and direction of exploration and development of normally-pressured shale gas from the periphery of Sichuan Basin[J]. Petroleum Geology & Experiment, 2020, 42(5):837-845.
[4]	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:地球科学, 2017, 47(6):720-732.
	CHEN Xu, FAN Junxuan, WANG Wenhui, et al. Stage-progressive distribution pattern of the Lungmachi black graptolitic shales from Guizhou to Chongqing, Central China[J]. Scientia Sinica(Terrae), 2017, 47(6):720-732.
[5]	聂海宽, 张柏桥, 刘光祥, 等. 四川盆地五峰组-龙马溪组页岩气高产地质原因及启示—以涪陵页岩气田JY6-2HF为例[J]. 石油与天然气地质, 2020, 41(3):464-473.
	NIE Haikuan, ZHANG Baiqiao, LIU Guangxiang, et al. Geological factors contributing to high shale gas yield in the Wufeng-Longmaxi Formation of Sichuan Basin: A case study of Well JY6-2HF in Fuling shale gas field[J]. Oil & Gas Geology, 2020, 41(3):464-473.
[6]	解德录. 川东南龙马溪下段页岩储层储集空间特征及地质控制-以綦江和涪陵为例[D]. 徐州:中国矿业大学, 2016.
	XIE Delu. Characteristics and geological control on the development of shale reservoir space at the lower segment of Longmaxi Formation in southeast Sichuan, China[D]. Xuzhou: China University of Mining and Technology, 2016.
[7]	王超, 张柏桥, 舒志国, 等. 四川盆地涪陵地区五峰组-龙马溪组海相页岩岩相类型及储层特征[J]. 石油与天然气地质, 2018, 39(3):485-497.
	WANG Chao, ZHANG Boqiao, SHU Zhiguo, et al. Lithofacies types and reservoir characteristics of marine shales of the Wufeng Formation-Longmaxi Formation in Fuling area, the Sichuan Basin[J]. Oil & Gas Geology, 2018, 39(3):485-497.
[8]	魏祥峰, 赵正宝, 王庆波, 等. 川东南綦江丁山地区上奥陶统五峰组—下志留统龙马溪组页岩气地质条件综合评价[J]. 地质评论, 2017, 463(1):153-164.
	WEI Xiangfeng, ZHAO Zhengbao, WANG Qingbo, et al. Comprehensive evaluation on geological conditions of the shale gas in Upper Ordovician Wufeng Formation-Lower Silurian Longmaxi Formation in Dingshan Area, Qijiang, Southeastern Sichuan[J]. Geological Review, 2017, 463(1):153-164.
[9]	何希鹏. 四川盆地东部页岩气甜点评价体系与富集高产影响因素[J]. 天然气工业, 2021, 41(1):59-71.
	HE Xipeng. Sweet spot evaluation system and enrichment and high yield influential factors of shale gas in Nanchuan area of eastern Sichuan Basin[J]. Natural Gas Industry, 2021, 41(1):59-71.
[10]	何贵松, 何希鹏, 高玉巧, 等. 渝东南盆缘转换带金佛斜坡常压页岩气富集模式[J]. 天然气工业, 2020, 40(6):50-60.
	HE Guisong, HE Xipeng, GAO Yuqiao, et al. Enrichment model of normal-pressure shale gas in the Jinfo slope of the basin-margin transition zone in Southeast Chongqing[J]. Natural Gas Industry, 2020, 40(6):50-60.
[11]	何希鹏, 高玉巧, 唐显春, 等. 渝东南地区常压页岩气富集主控因素分析[J]. 非常规天然气, 2017, 28(5):654-664.
	HE Xipeng, GAO Yuqiao, TANG Xianchun, et al. Analysis of major factors controlling the accumulation in normal pressure shale gas in the southeast of Chongqing[J]. Natural Gas Geoscience, 2017, 28(5):654-664.
[12]	吴聿元, 张培先, 何希鹏, 等. 渝东南地区五峰组—龙马溪组页岩岩石相及与页岩气富集关系[J]. 海相油气地质, 2021, 25(4):335-343.
	WU Yuyuan, ZHANG Peixian, HE Xipeng, et al. Lithofacies and shale gas enrichment of Wufeng Formation-Longmaxi Formation in Southeastern Chongqing[J]. Marine Origin Petroleum Geology, 2021, 25(4):335-343.
[13]	方栋梁, 孟志勇. 页岩气富集高产主控因素分析——以四川盆地涪陵地区五峰组—龙马溪组一段页岩为例[J]. 石油实验地质, 2020, 42(1):37-41.
	FANG Dongliang, MENG Zhiyong. Main controlling factors of shale gas enrichment and high yield: A case study of Wufeng-Longmaxi formations in Fuling area, Sichuan Basin[J]. Petroleum Geology & Experiment, 2020, 42(1):37-41.
[14]	方志雄, 何希鹏. 渝东南武隆向斜常压页岩气形成与演化[J]. 石油与天然气地质, 2016, 37(6):819-827.
	FANG Zhixiong, HE Xipeng. Formation and evolution of normal pressure shale gas reservoir in Wulong Syncline, Southeast Chongqing, China[J]. Oil & Gas Geology, 2016, 37(6):819-827.
[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]	邹才能, 等. 非常规油气地质[M]. 北京: 地质出版社, 2013.
	ZOU Caineng, et al. Unconventional petroleum geology[M]. Beijing: Geological Publishing House, 2013.
[17]	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 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.
[18]	金淳泰, 叶少华, 何原相, 等. 四川綦江观音桥志留纪地层及古生物[M]. 成都: 四川人民出版社, 1982.
	JIN Chuntai, YE Saohua, HE Yuanxiang, et al. Silurian Stratigraphy and paleontology of Guanyinqiao qijiang, Sichuan[M]. Chengdu: Sichuan People's Publishing House, 1982.
[19]	高玉巧, 蔡潇, 张培先, 等. 渝东南盆缘转换带五峰组—龙马溪组页岩气储层孔隙特征与演化[J]. 天然气工业, 2018, 28(12):15-25.
	GAO Yuqiao, CAI Xiao, ZHANG Peixian, et al. Pore characteristics and evolution of Wufeng-Longmaxi Fms shale gas reservoirs in the basin-margin transition zone of SE Chongqing[J]. Natural Gas Industry, 2018, 28(12):15-25.
[20]	舒志国, 王进. 四川盆地涪陵气田焦石坝区块上部气层地质特征分析及有利区优选[J]. 石油实验地质, 2021, 43(1):34-44.
	SHU Zhiguo, WANG Jin. Geological characteristics and optimization of favorable areas in the upper gas reservoir of Jiaoshiba block in the Fuling Shale Gas Field, Sichuan Basin[J]. Petroleum Geology & Experiment, 2021, 43(1):34-44.
[21]	刘树根, 王世玉, 孙玮, 等. 四川盆地及其周缘五峰组—龙马溪组黑色页岩特征[J]. 成都理工大学学报(自然科学版), 2013, 40(6):621-639.
	LIU Sugen, WANG Shiyu, SUN Wei, et al. Characteristics of black shale in Wufeng Formation and Longmaxi Formation in Sichuan Basin and its peripheral areas[J]. Journal of Chengdu University of Technology(Science & Technology Edition), 2013, 40(6):621-639.
[22]	康玉柱, 张大伟, 赵先良, 等. 中国非常规油气地质学[M]. 北京: 地质出版社, 2015.
	KANG Yuzhu, ZHANG Dawei, ZHAO Xianliang, et al. Unconventional petroleum geology in China[M]. Beijing: Geological Publishing House, 2015.

生物带	陈旭等,2015	金淳泰等,1982
LM9	Spirograptus turriculatus带
LM8	Stimulograptus sedgwickii带	Monograptus sedgwickii带
LM7	Lituigraptus convolutus带	Oktavites communis带
LM6	Demirastrites triangulatus带	Demirastrites triangulates带
LM5	Coronograptus cyphus带	Pristiograptus leei带
LM4	Cystograptus wesiculosus带	Pristiograptus cyphus带
LM3	Parakidogr acumlnatus带	Orthograptus vesiculosus带
LM2	Akidograptus acuminatus带	Akidograptus acuminatus带
LM1	Persculptogr persculptus带	Glyptograptus persculptus带

小层	硅质含量	黏土矿物含量	碳酸盐矿物含量	有机质及黄铁矿含量
①	>70 %	15 %~20 %	0~5 %	5 %~10 %
②	55 %~60 %	20 %~25 %	5 %~10 %	10 %~15 %
③	50 %~60 %	25 %~30 %	5 %~10 %	10 %~15 %
④	40 %~50 %	30 %~40 %	5 %~10 %	5 %~10 %
⑤	35 %~40 %	55 %~60 %	5 %~10 %	0~5 %

层位	石英含量	黏土矿物含量	碳酸盐矿物含量
①—③	（42.7 %~56.6 %）/49.9 %	（18.0 %~39.1 %）/32.7 %	（1.5 %~13.8 %）/7.8 %
④—⑤	（33.9 %~48.5 %）/39.3 %	（27.7 %~57.2 %）/46.7 %	（1.0 %~20.4 %）/6.6 %