韩城煤层气田11号煤层水化学场特征及其对煤层气的控制作用

doi:10.3969/j.issn.1672-7703.2018.03.009

摘要/Abstract

摘要： 通过研究韩城煤层气田11号煤层水化学成分的变化规律，确定了该煤层水主要包括淡水淋滤作用为主的矿化度小于1000mg/L的NaHCO₃型水，混合作用为主的矿化度为1000~3000mg/L的NaHCO₃型水，溶滤作用为主的矿化度为3000~10000mg/L的Na₂SO₄型水和浓缩作用为主的矿化度大于10000mg/L的CaCl₂型水，并结合构造特征将水化学场划分为HCO₃-Na带、HCO₃-Cl-Na带、SO₄-Cl-Ca-Na带和Cl-Na带。对11号煤层水化学场与煤层含气量及煤层气井产能关系进行研究，发现Cl-Na带有利于煤层气富集，煤层气井产能效果好；HCO₃-Na带不利于煤层气富集，煤层气井产能效果差。

关键词: 水化学场, 煤层水, 水型, 煤层气, 韩城

Abstract: The change laws of hydrochemistry components of 11# coal seam in Hancheng coalbed methane (CBM) feld were investigated. It is determined that there are four types of coal seam water in this feld, including NaHCO₃ type water (salinity lower than 1000 mg/L) dominated by fresh water leaching, NaHCO₃ type water (salinity 1000-3000 mg/L) dominated by mixing, Na₂SO₄ type water (salinity 3000-10000 mg/L) dominated by lixivation and CaCl₂ type water (salinity higher than 10000 mg/L) dominated by concentration. Then, combined with structural characteristics, the hydrochemistry feld was divided into four zones, including HCO₃-Na Zone, HCO₃-Cl-Na zone, SO₄-Cl-Ca-Na zone and Cl-Na zone. Finally, the relationships of hydrochemistry feld of 11# coal seam vs. CBM content and CBM well productivity were studied. It is indicated that it is favorable for CBM enrichment in Cl-Na zone and the CBM well productivity is good. In HCO₃-Na zone, however, it is not favorable for CBM enrichment and the CBM well productivity is poor.

Key words: hydrochemistry feld, coal seam water, water type, coalbed methane, Hancheng

中图分类号:

李剑, 车延前, 熊先钺, 王伟, 李涛, 王成旺, 胡唤雨. 韩城煤层气田11号煤层水化学场特征及其对煤层气的控制作用[J]. 中国石油勘探, 2018, 23(3): 74-80.

Li Jian, Che Yanqian, Xiong Xianyue, Wang Wei, Li Tao, Wang Chengwang, Hu Huanyu. Hydrochemistry feld characteristic of 11# coal seam in Hancheng CBM feld and its controlling effect on CBM[J]. China Petroleum Exploration, 2018, 23(3): 74-80.

参考文献

[1] 李学礼,孙占学,刘金辉.水文地球化学[M].北京:原子能出版社, 2010,195-200. Li Xueli,Sun Zhanxue,Liu Jinhui.Hydro-geochemistry[M]. Beijing:Atomic Energy Press,2010,195-200.
[2] 王双明.韩城矿区煤层气地质条件及赋存规律[M].北京:地质出版社,2008. Wang Shuangming.Geological condition and gas occurrence regularity of Hancheng block[M].Beijing:Geological Publishing House,2008.
[3] 毛得雷,康永尚,韩军,秦绍峰,王会娟.韩城煤层气田水文地质旋回对煤层气的影响[J].煤炭学报,2012,37(增刊2):390-394. Mao Delei,Kang Yongshang,Han Jun,Qin Shaofeng,Wang Huijuan.Influence of hydrogeological cycles on CBM in Hancheng CBM field,Central China[J].Journal of China Coal Society,2012,37(Supp.2):390-394.
[4] 王怀勐,朱炎铭,李伍,张建胜,罗跃.煤层气赋存的两大地质控制因素[J].煤炭学报,2011,36(7):1129-1134. Wang Huaimeng,Zhu Yanming,Li Wu,Zhang Jiansheng, Luo Yue.Two major geological control factors of occurrence characteristics of CBM[J].Journal of Coal Society,2011,36(7):1129-1134.
[5] 刘方槐,颜婉荪.油气田水文地质学原理[M].北京:石油工业出版社, 1991,1-5. Liu Fanghuai Yan Wansun.Oil and gas field hydrogeology theory[M].Beijing:Petroleum Industry Press,1991,1-5.
[6] 梁晓伟,牛小兵,李卫成,张三,叶博,尤源.鄂尔多斯盆地油田水化学特征及地质意义[J].成都理工大学学报:自然科学版,2012, 39(5):502-508. Liang Xiaowei,Niu Xiaobing,Li Weicheng,Zhang San,Ye Bo, You Yuan.Chemical character of oil-field water in Ordos Basin and geological significance[J].Journal of Chengdu University of Technology:Science&Technology Edition,2012,39(5):502-508.
[7] 何生,唐仲华,陶一川,赵庆吉,肖海燕,唐黎明.松南十屋断陷低压系统的油气水文地质特征[J].地球科学——中国地质大学学报, 1995,20(1):79-84. He Sheng,Tang Zhonghua,Tao Yichuan,Zhao Qingji, Xiao Haiyan,Tang Liming.Hydrogeological characteristics of underpressure system,distribution of oil and gas in Shiwu fault subsidence,southern Songliao Basin[J].Earth Science-Journal of China University of Geosciences,1995,20(1):79-84.
[8] 徐国盛,刘树根,张英俊,张龙腾.川东石炭系天然气富集的水化学条件[J].石油与天然气地质,1999,20(1):15-19. Xu Guosheng,Liu Shugen,Zhang Yingjun,Zhang Longteng. Hydrochemical condition of natural gas enrichment in east Sichuan Carboniferous system[J].Oil&Gas Geology,1999,20(1):15-19.
[9] 查明.断陷盆地油气二次运移与聚集[M].北京:地质出版社,1997:27-35. Zha Ming.Oil and gas secondary migration and enrichment of rift Basin[M].Beijing:Geological Publishing House,1997:27-35.
[10] 渠永宏,孙镇城,冯晓杰,陈章明.冀中坳陷北部潜山地层水水文地质特征及对油气勘探的意义[J].大庆石油学院学报,1999,23(3):8-11. Qu Yonghong,Sun Zhencheng,Feng Xiaojie,Chen Zhangming. Middle-upper proterozoic buried hill groundwater geohydrologic character and significance for exploration in northern Jizhong depression basin[J].Journal of Daqing Petroleum Institute, 1999,23(3):8-11.
[11] 中国地质调查局.水文地质手册[M].北京:地质出版社,2014:102. China geological survey.Hydrological geology handbook[M]. Beijing:Geological Publishing House,2014:102.
[12] 肖长来,梁秀娟,王彪.水文地质学[M].北京:清华大学出版社, 2010. Xiao Changlai,Liang Xiujuan,Wang Biao.Hydrologic geology[M].Beijing:Tsinghua University Press,2010.
[13] 苏林.天然水系中的油田水[M].北京:石油工业出版社,1956. Su Lin.Oil field water in natural water system[M].Beijing:Petroleum Industry Press,1956.
[14] 王瑞久.三线图解及其水文地质解释[J].工程勘察,1983(6):6-10. Wang Ruijiu.Three line diagram and its hydro-geological interpretation[J].Geotechnical Investigation,1983(6):6-10.
[15] 刘东鹰.苏北盆地天然气藏地层水化学特征分析[J].复杂油气藏, 2010,3(1):6-9. Liu Dongying.Hydrochemistry characteristics of groundwater of gas reservoir in Subei Basin[J].Complex Hydrocarbon Reservoirs, 2010,3(1):6-9.
[16] 胡国艺,关辉,蒋登文,杜平,李志生.山西沁水煤层气田煤层气成藏条件分析[J].中国地质,2004,31(2):214-217. Hu Guoyi,Guan Hui,Jiang Dengwen,Du Ping,Li Zhisheng. Analysis of conditions for the formation of a coal methane accumulation in the Qinshui coal methane field[J].Geology in China,2004,31(2):214-217.
[17] 田冲,汤达祯,周志军,陶树,陈晓智,宋从雷.彬长矿区水文地质特征及其对煤层气的控制作用[J].煤田地质与勘探,2012,40(1):43-46. Tian Chong,Tang Dazhen,Zhou Zhijun,Tao Shu,Chen Xiaozhi,Song Conglei.Hydrogeological characteristics and their control on coalbed methane in Binchang mining area[J]. Coal Geology&Exploration,2012,40(1):43-46.
[18] 叶建平,武强,王子和.水文地质条件对煤层气赋存的控制作用[J]. 煤炭学报,2001,26(5):459-462. Ye Jianping,Wu Qiang,Wang Zihe.Controlled characteristics of hydrogeological conditions on the coalbed methane migration and accumulation[J].Journal of China Coal Society, 2001,26(5):459-462.
[19] 赵庆波,李五忠,孙粉锦.中国煤层气分布特征及高产富集因素[J]. 石油学报,1997,18(4):1-6. Zhao Qingbo,Li Wuzhong,Sun Fenjin.Distribution and accumulation regularity for coalbed methane in China[J].Acta Petrolei Sinica,1997,18(4):1-6.
[20] 秦勇,傅雪海,叶建平,林大扬,唐书恒,李贵中.中国煤储层岩石物理学因素控气特征及机理[J].中国矿业大学学报,1999,28(1):14-19. Qin Yong,Fu Xuehai,Ye Jianping,Lin Dayang,Tang Shuheng,Li Guizhong.Geological controls and their mechanisms of coal-reservoir petrography and coalbed methane occurrence in China[J].Journal of China University of Mining,1999,28(1):14-19.
[21] 唐书恒,马彩霞,袁焕章.华北地区石炭二叠系煤储层水文地质条件[J].天然气工业,2003,23(1):32-35. Tang Shuheng,Ma Caixia,Yuan Huanzhang.Hydrogeological conditions of Carboniferous Permian coal reservoir in north China[J].Natural Gas Industry,2003,23(1):32-35.