鄂尔多斯盆地宜川地区本溪组8号煤岩特征及成煤环境分析

doi:10.3969/j.issn.1006-6535.2024.06.004

摘要/Abstract

摘要： 为明确鄂尔多斯盆地伊陕斜坡宜川—上畛子区块本溪组8号煤岩纵向优势储层及有利勘探区带,选取宜川地区本溪组8号煤岩岩心样品,通过宏观煤岩类型描述、显微组分鉴定、主微量元素分析等实验,综合分析8号煤岩沉积环境及成煤演化特征。研究表明:本溪组8号煤岩为光亮煤、半亮煤及暗淡煤混合堆积产物。煤岩有机组分以镜质组为主,惰质组次之;无机组分以高岭石、伊蒙混层等黏土矿物为主,含少量石英、长石;中下部煤岩有机组分含量多,光亮煤发育,为优质煤层。煤相及煤岩演化程度是成藏的主控因素,低位覆水森林沼泽是有利勘探区带。该认识对宜川地区本溪组8号煤岩富集规律分析具有重要意义,对煤岩气勘探开发具有较好的指导意义。

关键词: 煤层气, 煤岩特征, 成煤环境, 煤岩组分, 地球化学特征, 鄂尔多斯盆地, 宜川地区

Abstract: To clarify the vertical dominant reservoir and favorable exploration zone of No.8 coal seam in the Benxi Formation of the Yichuan-Shangzhenzi Block in the Yishan Slope of the Ordos Basin,the cores of No.8 coal seam in the Benxi Formation of the Yichuan Area were selected,and the sedimentary environment and coal-forming evolution characteristics of No.8 coal rock were comprehensively analyzed through experiments such as macro coal rock classification,microscopic component identification,major and trace element analysis.The results indicate that the No.8 coal rock of the Benxi Formation is the mixed accumulation product of bright coal,semi-bright coal,and dull coal.The organic components of the coal rock are mainly vitrinite,followed by inertinite.The inorganic components mainly consist of clay minerals such as kaolinite and illite-montmorillonite mixed layer,containing a small amount of quartz and feldspar.The middle and lower parts of the coal are rich in organic components,and the bright coal is well-developed,which constitutes a high-quality coal seam.The evolution degree of coal facies and coal rock is the main controlling factor of hydrocarbon accumulation,and the low water-covered forest swamp is the favorable exploration zone.This understanding is highly significant for the analysis of the enrichment law of No.8 coal seam in the Benxi Formation in the Yichuan area and has an excellent guiding significance for the exploration and development of coalbed methane.

Key words: coalbed methane, coal rock characteristics, coal-forming environment, coal rock composition, geochemical characteristics, Ordos Basin, Yichuan Area

中图分类号:

TE121

沈柏坪, 李荣相, 白洪涛, 朱连丰, 雷虎, 陆纪潮. 鄂尔多斯盆地宜川地区本溪组8号煤岩特征及成煤环境分析[J]. 特种油气藏, 2024, 31(6): 32-38.

Shen Baiping, Li Rongxiang, Bai Hongtao, Zhu Lianfeng, Lei Hu, Lu Jichao. Analysis of Coal Rock Characteristics and Coal-forming Environment of the No.8 Coal Seam in the Benxi Formation in Yichuan Area,Ordos Basin[J]. Special Oil & Gas Reservoirs, 2024, 31(6): 32-38.

参考文献

[1] 郭小军.鄂尔多斯盆地石炭—二叠纪聚煤规律与煤层气勘探有利区优选[D].东营:中国石油大学(华东),2010.
GUO Xiaojun.The law of Carboniferous-Permian coal accumulation in Ordos Basin and the optimization of favorable areas for coalbed methane exploration[D].Dongying:China University of Petroleum(East China),2010.
[2] 牛海青.鄂尔多斯盆地煤层气富集成藏规律研究[D].东营:中国石油大学(华东),2010.
NIU Haiqing.Study on enrichment and accumulation law of coalbed methane in Ordos Basin [D].Dongying:China University of Petroleum(East China),2010.
[3] 秦玉金,陈煜朋,姜文忠,等.深部煤层瓦斯赋存机制研究现状及展望[J].煤矿安全,2020,51(5):10-15.
QIN Yujin,CHEN Yupeng,JIANG Wenzhong,et al.Research status and prospect of gas occurrence mechanism in deep coal seam[J].Safety in Coal Mines,2020,51(5):10-15.
[4] 高丽军,逄建东,谢英刚,等.临兴区块深部煤层气潜在可采地质模式分析[J].煤炭科学技术,2019,47(9):89-96.
GAO Lijun,PANG Jiandong,XIE Yinggang,et al.Analysis on potential geological mining model of deep coalbed methane in Linxing Block[J].Coal Science and Technology,2019,47(9):89-96.
[5] 李国永,姚艳斌,王辉,等.鄂尔多斯盆地神木—佳县区块深部煤层气地质特征及勘探开发潜力[J].煤田地质与勘探,2024,52(2):70-80.
LI Guoyong,YAO Yanbin,WANG Hui,et al.Deep coalbed methane resources in the Shenmu-Jiaxian Block,Ordos Basin,China:geological characteristics and potential for exploration and exploitation[J].Coal Geology & Exploration,2024,52(2):70-80.
[6] 曾凡武,姜志高,蔡潇,等.延川南深部煤层气富集高产关键因素[J].中国煤层气,2022,19(4):16-20.
ZENG Fanwu,JIANG Zhigao,CAI Xiao,et al.Key factors for enrichment and high production of deep coalbed methane in southern Yanchuan[J].China Coalbed Methane,2022,19(4):16-20.
[7] 何发岐,董昭雄.深部煤层气资源开发潜力——以鄂尔多斯盆地大牛地气田为例[J].石油与天然气地质,2022,43(2):277-285.
HE Faqi,DONG Zhaoxiong.Development potential of deep coalbed methane:a case study in the Daniudi Gas Field,Ordos Basin[J].Oil & Gas Geology,2022,43(2):277-285.
[8] 赵伟波,刘洪林,王怀厂,等.鄂尔多斯盆地深部本溪组煤孔隙特征及成因探讨——以榆林M172井8号煤为例[J].天然气地球科学,2024,35(2):202-216.
ZHAO Weibo,LIU Honglin,WANG Huaichang,et al.Discussion on pore characteristics and forming mechanism of coal in the deep area,Ordos Basin:case study of No.8 coal seam in Well M172 of Yulin Area[J].Natural Gas Geoscience,2024,35(2):202-216.
[9] 杨俊杰.鄂尔多斯盆地构造演化与油气分布规律[M].北京:石油工业出版社,2002:48-59.
YANG Junjie.Structural evolution and hydrocarbon distribution in Ordos Basin[M].Beijing:Petroleum Industry Press,2002:48-59.
[10] 何自新.鄂尔多斯盆地演化与油气[M].北京:石油工业出版社,2003:161-162.
HE Zixin.Evolution and oil-gas resources of the Ordos Basin[M].Beijing:Petroleum Industry Press,2003:161-162.
[11] 中华人民共和国国家质量监督检验检疫总局.烟煤的宏观煤岩类型分类:GB/T 18023—2000[S].北京:中国标准出版社,2000:8.
General Administration of Quality Supervision,Inspection and Quarantine of the People's Republic of China.Classification of macrolithotype for bituminous coal:GB/T 18023-2000[S].Beijing:Standards Press of China,2000:8.
[12] 中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会.烟煤显微组分分类:GB/T 15588—2013[S].北京:中国标准出版社,2014:16.
General Administration of Quality Supervision,Inspection and Quarantine of the People's Republic of China,Standardization administration of the People's Republic of China.Classification of macerals for bituminous coal:GB/T 15588-2013[S].Beijing:Standards Press of China,2014:16.
[13] 王成旺,徐凤银,甄怀宾,等.鄂尔多斯盆地东缘本溪组8#煤层方解石脉体成因[J].特种油气藏,2022,29(4):62-68.
WANG Chengwang,XU Fengyin,ZHEN Huaibin,et al.Genesis of calcite veins in 8# coal bed of Benxi Formation on eastern margin of Ordos Basin[J].Special Oil & Gas Reservoirs,2022,29(4):62-68.
[14] 霍永忠,张爱云.煤层气储层的显微孔裂隙成因分类及其应用[J].煤田地质与勘探,1998,26(6):29-33.
HUO Yongzhong,ZHANG Aiyun.The genetic classification and its application of microfracture in coal reservoir[J].Coal Geology & Exploration,1998,26(6):29-33.
[15] 代世峰,任德贻,唐跃刚.煤中常量元素的赋存特征与研究意义[J].煤田地质与勘探,2005,33(2):1-5.
DAI Shifeng,REN Deyi,TANG Yuegang.Modes of occurrence of major elements in coal and their study significance[J].Coal Geology & Exploration,2005,33(2):1-5.
[16] 袁月.准格尔煤田唐公塔6号煤中伴生元素地球化学特征[D].邯郸:河北工程大学,2015.
YUAN Yue.Geochemical characteristics of accompanying elements in No.6 coal seam of Tanggongta in Zhungeer Coalfield[D].Handan:Hebei University of Engineering,2015.
[17] 唐跃刚,张会勇,彭苏萍,等.中国煤中有机硫赋存状态、地质成因的研究[J].山东科技大学学报(自然科学版),2002,24(4):1-4.
TANG Yuegang,ZHANG Huiyong,PENG Suping,et al.Study on occurrence mode and geological genesis of organic sulfur in coal in China[J].Journal of Shandong University of Science and Technology(Natural Science Edition),2002,24(4):1-4.
[18] 刘少林.高有机硫煤分选组分中硫的赋存形态及其热变迁行为研究[D].太原:太原理工大学,2019.
LIU Shaolin.Sulfur occurrence and transformation during pyrolysis of the flotation fraction from coking coals with high organic sulfur[D].Taiyuan:Taiyuan University of Technology,2019.
[19] 杨宁.鄂尔多斯盆地东缘晚古生代煤与暗色页岩地球化学特征研究[D].北京:中国地质大学(北京),2018.
YANG Ning.Geochemical characteristics of Late Paleozoic coal and dark shale in the eastern margin of Ordos Basin[D].Beijing:China University of Geosciences(Beijing),2018.
[20] 马行陟,宋岩,柳少波,等.鄂尔多斯盆地东缘韩城地区煤层气地球化学特征及其成因[J].天然气工业,2011,31(4):17-20,120-123.
MA Xingzhi,SONG Yan,LIU Shaobo,et al.Origins and geochemical characteristics of coalbed methane in Hancheng,eastern Ordos Basin[J].Natural Gas Industry,2011,31(4):17-20,120-123.
[21] 高小龙,王高皓,罗成云,等.王洼矿区8#煤层煤质特征及成煤环境分析[J].能源与节能,2023,28(10):30-33.
GAO Xiaolong,WANG Gaohao,LUO Chengyun,et al.Coal quality characteristics and coal-forming environment of 8# coal seam in Wangwa Mining Area[J].Energy and Energy Conservation,2023,28(10):30-33.
[22] 刘灿.山西兴县石炭系本溪组煤岩特征及成煤环境[D].成都:成都理工大学,2020.
LIU Can.Coal-rock characteristics and coal-bearing environment of Carboniferous Benxi Formation in Xingxian County,Shanxi[D].Chengdu:Chengdu University of Technology,2020.
[23] 陶传奇,李勇,倪小明,等.临兴地区上石炭统本溪组煤成熟度演化过程研究[J].中国矿业大学学报,2022,51(2):344-353.
TAO Chuanqi,LI Yong,NI Xiaoming,et al.Study of the evolution process of coal maturity in Upper Carboniferous Benxi Formation,Linxing Area[J].Journal of China University of Mining & Technology,2022,51(2):344-353.