低阶煤生物采气可行性——以二连盆地吉尔嘎朗图凹陷为例

doi:10.7623/syxb201811007

石油学报 ›› 2018, Vol. 39 ›› Issue (11): 1272-1278,1291.DOI: 10.7623/syxb201811007

低阶煤生物采气可行性——以二连盆地吉尔嘎朗图凹陷为例

孙斌¹, 李金珊^2,3, 承磊⁴, 杨青¹, 田文广¹, 黎霞⁴, 陈浩¹, 祁灵¹

1. 中国石油勘探开发研究院非常规研究所河北廊坊 065000;
2. 北京科技大学土木与资源工程学院北京 100089;
3. 中国中钢集团有限公司北京 100089;
4. 农村农业部沼气科学研究所四川成都 610041

收稿日期:2018-01-15 修回日期:2018-04-16 出版日期:2018-11-25 发布日期:2018-12-10
通讯作者: 李金珊,男,1972年8月生,1996年获山东大学经济管理专业学士学位,2014年获北京科技大学矿业工程专业博士学位,现为中国中钢集团有限公司高级工程师,主要从事非常规天然气以及非洲能源经济领域的研究。Email:lijinshan2009@126.com
作者简介:孙斌,男,1969年5月生,1991年获东北工学院秦皇岛分院地质矿产勘查专业学士学位,2009年获中国矿业大学(北京)矿产普查与勘探专业博士学位,现为中国石油勘探开发研究院高级工程师,主要从事煤层气地质选区评价和勘探部署工作。Email:s-bin@petrochina.com.cn
基金资助:
国家科技重大专项（2016ZX05041-004）和中国石油天然气股份有限公司科技重大专项（2017E-14）资助。

The feasibility of biological gas recovery in low-rank coal: a case study of Jiergalangtu depression in Erlian Basin

Sun Bin¹, Li Jinshan^2,3, Cheng Lei⁴, Yang Qing¹, Tian Wenguang¹, Li Xia⁴, Chen Hao¹, Qi Ling¹

1. Unconventional Resources Research Department, PetroChina Research Institute of Petroleum Exploration and Development, Hebei Langfang 065000, China;
2. School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100089, China;
3. Sinosteel Group Corporation Limited, Beijing 100089, China;
4. Biogas Institute of Ministry of Agriculture and Rural Affairs, Sichuan Chengdu 610041, China

Received:2018-01-15 Revised:2018-04-16 Online:2018-11-25 Published:2018-12-10

摘要/Abstract

摘要：

生物采气技术在美国粉河盆地试验成功，使枯竭的低阶煤层气田重新高产，证实生物采气是高效开发低阶煤层气的有效途径之一。为了有效地开发中国低阶煤层气，在二连盆地吉尔嘎朗图凹陷的煤层开展了检测菌群类型、了解生气途径和生物产气潜力模拟实验。实验结果表明，吉尔嘎朗图凹陷的煤样和煤层水中均含有大量的产甲烷菌，乙酸裂解和CO₂还原共同参与煤层甲烷的生成，在原位条件下所有煤样均具有产甲烷潜力，Ⅳ煤组在5个月内煤样产生甲烷为11±1.4 μmol/g（相当于0.25~0.28 m³/t），在添加外源菌种的实验中，Ⅲ煤组样品产气量为18.40 μmol/g（相当于0.41 m³/t）。研究认为，二连盆地吉尔嘎朗图凹陷具备生物采气的条件，尤其是含气量低的Ⅲ煤组，Ⅳ煤组可在采用常规方法采气枯竭后，再利用生物采气技术作为重新提高单井产量和采收率的有效手段。二连盆地被优选出6个与吉尔嘎朗图煤层气地质条件相似的有利凹陷，资源量为4 180×10¹²m³。

关键词: 低阶煤层气, 生物气, 产甲烷菌, 二连盆地, 吉尔嘎郎图凹陷, 生物采气

Abstract:

The biological gas recovery technology has been applied successfully in the Powder River Basin of U.S., so that the depleted low-rank-coal gas field can re-achieve high yield, thus proving that biological gas recovery is one of effective approaches for the high efficiency development of coalbed methane (CBM). In order to effectively develop the low-rank CBM in China, a simulation experiment was conducted to test the flora types and make clear the gas production means and biological gas recovery potential in the coal seams of Jiergalangtu depression, Erlian Basin. The results indicate that a massive amount of methanogen exists in the coal samples and coalbed water of Jiergalangtu Depression, and acetic acid dissociation and CO₂ reduction both lead to the production of CBM. All coal samples have methane production potential capacity under the in-situ condition, and the Ⅳ coal seam group produced 11±1.4 μmol/g of methane (equivalent to 0.25-0 28 m³/t) of coal sample in five months. In the experiment with exogenous bacteria, the Ⅲ coal seam group produced 18.40 μmol/g of methane (equivalent to 0.41 m³/t) of coal sample. The studies reveal that the Jiergalangtu depression of Erlian Basin can provide the conditions for biological gas recovery, especially for the Ⅲ coal seam group with low gas content. For the Ⅳ coal seam, after gas is depleted using conventional methods, biological gas recovery technology is used as an effective means to improve the single-well production and recovery. At present, six favorable depressions with the geological conditions of coalbed methane similar to Erlian Basin are selected in this study, and the total amount of resources is 4 180×10¹²m³.

Key words: low-rank coalbed methane, biogenetic gas, methanogen, Erlian Basin, Jiergalangtu depression, biological gas recovery

中图分类号:

TE132

孙斌, 李金珊, 承磊, 杨青, 田文广, 黎霞, 陈浩, 祁灵. 低阶煤生物采气可行性——以二连盆地吉尔嘎朗图凹陷为例[J]. 石油学报, 2018, 39(11): 1272-1278,1291.

Sun Bin, Li Jinshan, Cheng Lei, Yang Qing, Tian Wenguang, Li Xia, Chen Hao, Qi Ling. The feasibility of biological gas recovery in low-rank coal: a case study of Jiergalangtu depression in Erlian Basin[J]. Acta Petrolei Sinica, 2018, 39(11): 1272-1278,1291.

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低阶煤生物采气可行性——以二连盆地吉尔嘎朗图凹陷为例

The feasibility of biological gas recovery in low-rank coal: a case study of Jiergalangtu depression in Erlian Basin

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