Production feature and influencing factors of deep coalbed methane In Linxing Block
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摘要: 【目的】深部煤层气生产特征与中浅部煤层气生产特征具有明显区别，且同一区块内深部煤层气排采井也存在差异性。相关研究尚处于探索阶段，深入分析深部煤层气生产特征差异的影响因素对后续大规模开发阶段的产能预测与生产管理具有重要意义。【方法】为明确临兴区块深部煤层气生产特征及其影响因素，基于含气性、煤厚、埋深、水化学特征及压裂工艺等地质工程因素开展研究。【结果和结论】结果表明：(1)临兴区块深部煤层气井分为过饱和气藏自喷井、过饱和气藏排采井和欠饱和气藏排采井三类。(2)含气性是三种生产特征的主控因素，工区内1 800~2 000 m埋深的煤层气井含气量与稳产气量均相对较高。(3)欠饱和气藏排采井储层保存条件较差，水化学特征与其他两类井存在明显差异，导致其生产效果相对较差，且由于高矿化度和高碳酸氢根离子产生的管柱结垢与腐蚀导致排采不连续。(4)大规模压裂是提高气井产量的有效储层改造措施，压裂砂对裂缝的有效支撑是保障深部煤层井高气量稳产的关键因素。上述成果明确了临兴区块深部煤层气生产特征差异影响因素，对研究区和邻近地区深部煤层气生产具有参考意义。Abstract: The production characteristics of deep coalbed methane are significantly different from those of medium and shallow coalbed methane, and there are also differences in the drainage wells within the same block.Due to the fact that relevant research is still in the exploratory stage, the analysis of factors affecting the production characteristics of deep coalbed methane is of great significance for the production capacity research and production management in the subsequent large-scale development stage of this field.Deep coalbed methane wells in the Linxing block can be divided into three types based on production characteristics： self flowing wells in supersaturated gas reservoirs, drainage wells in supersaturated gas reservoirs, and drainage wells in undersaturated gas reservoirs.To clarify the influencing factors of deep coalbed methane production characteristics in the Linxing block, this article conducts research based on geological engineering factors such as gas content, coal thickness, burial depth, hydrochemical characteristics, and fracturing technology.The results show that： (1) Gas content is the main controlling factor for the three production characteristics, and the gas content and stable production of coalbed methane wells buried at depths of 1 800-2 000 meters in the work area are relatively high; (2) The storage conditions of undersaturated gas reservoir drainage wells are poor, and there are significant differences in hydrochemical characteristics compared to the other two types of wells, resulting in relatively poor production efficiency.Moreover, due to high salinity and high bicarbonate ions, the scaling and corrosion of the pipe columns can cause discontinuous drainage; (3) Large scale fracturing is an effective reservoir transformation measure to increase gas well production, and the effective support of fracturing sand on fractures is a key factor in ensuring high gas production and stable production in deep coal seam wells.The above achievements have clarified the influencing factors of the differences in the production characteristics of deep coalbed methane in the Linxing block, and have guiding significance for the production of deep coalbed methane in the research area and adjacent areas.
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[1] 徐凤银, 王成旺, 熊先钺, 等. 深部(层)煤层气成藏模式与关键技术对策:以鄂尔多斯盆地东缘为例[J]. 中国海上油气, 2022, 34(4):30-42. XU Fengyin, WANG Chengwang, XIONG Xianyue, et al. Deep(layer) coalbed methane reservoir forming modes and key technical countermeasures:Taking the eastern margin of Ordos Basin as an example[J]. China Offshore Oil and Gas, 2022, 34(4):30-42.
[2] 周德华, 陈刚, 陈贞龙, 等. 中国深层煤层气勘探开发进展、关键评价参数与前景展望[J]. 天然气工业, 2022, 42(6):43-51. ZHOU Dehua, CHEN Gang, CHEN Zhenlong, et al. Exploration and development progress, key evaluation parameters and prospect of deep CBM in China[J]. Natural Gas Industry, 2022, 42(6):43-51.
[3] 李勇, 徐立富, 张守仁, 等. 深煤层含气系统差异及开发对策[J]. 煤炭学报, 2023, 48(2):900-917. LI Yong, XU Lifu, ZHANG Shouren, et al. Gas bearing system difference in deep coal seams and corresponded development strategy[J]. Journal of China Coal Society, 2023, 48(2):900-917.
[4] 徐凤银, 王成旺, 熊先钺, 等. 鄂尔多斯盆地东缘深部煤层气成藏演化规律与勘探开发实践[J]. 石油学报, 2023, 44(11):1764-1780. XU Fengyin, WANG Chengwang, XIONG Xianyue, et al. Evolution law of deep coalbed methane reservoir formation and exploration and development practice in the eastern margin of Ordos Basin[J]. Acta Petrolei Sinica, 2023, 44(11):1764-1780.
[5] 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.
[6] 杨帆, 李斌, 王昆剑, 等. 深部煤层气水平井大规模极限体积压裂技术:以鄂尔多斯盆地东缘临兴区块为例[J]. 石油勘探与开发, 2024, 51(2):389-398. YANG Fan, LI Bin, WANG Kunjian, et al. Extreme massive hydraulic fracturing in deep coalbed methane horizontal wells:A case study of the Linxing Block, eastern Ordos Basin, NW China[J]. Petroleum Exploration and Development, 2024, 51(2):389-398.
[7] 康永尚, 皇甫玉慧, 张兵, 等. 含煤盆地深层"超饱和" 煤层气形成条件[J].石油学报, 2019, 40(12):1426-1438. KANG Yongshang, HUANGFU Yuhui, ZHANG Bing, et al.Formation conditions for deep oversaturated coalbed methane in coal-bearing basins[J].Acta Petrolei Sinica, 2019, 40(12):1426-1438.
[8] 李勇, 王延斌, 孟尚志, 等. 煤系非常规天然气合采地质基础理论进展及展望[J]. 煤炭学报, 2020, 45(4):1406-1418. LI Yong, WANG Yanbin, MENG Shangzhi, et al. Theoretical basis and prospect of coal measure unconventional natural gas co-production[J].Journal of China Coal Society, 2020, 45(4):1406-1418.
[9] 刘池洋, 王建强, 张东东, 等. 鄂尔多斯盆地油气资源丰富的成因与赋存-成藏特点[J]. 石油与天然气地质, 2021, 42(5):1011-1029. LIU Chiyang, WANG Jianqiang, ZHANG Dongdong, et al. Genesis of rich hydrocarbon resources and their occurrence and accumulation characteristics in the Ordos Basin[J]. Oil & Gas Geology, 2021, 42(5):1011-1029.
[10] Xu Lifu, Li Yong, Sun Xiaoguang, Hu Weiqiang, Zhang Yuan. Geological controls on gas content in tidal flats-lagoonal and deltaic shales in the northeastern Ordos basin[J]. Journal of Petroleum Science and Engineering, 2023, 221:111291.
[11] 孙平, 刘洪林, 巢海燕, 等. 低煤阶煤层气勘探思路[J]. 天然气工业, 2008, 28(3):19-22. SUN Ping, LIU Honglin, CHAO Haiyan, et al. Exploration direction of coalbed methane in low-rank Coats[J]. Natural Gas Industry, 2008, 28(3):19-22.
[12] 石军太, 曹敬添, 徐凤银, 等. 深部煤层气游离气饱和度计算模型及其应用[J]. 煤田地质与勘探, 2024, 52(2):134-146. SHI Juntai, CAO Jingtian, XU Fengyin, et al. A calculation model of free gas saturation in deep coalbed methane reservoirs and its application[J]. Coal Geology & Exploration, 2024, 52(2):134-146.
[13] 熊先钺, 闫霞, 徐凤银, 等. 深部煤层气多要素耦合控制机理、解吸规律与开发效果剖析[J]. 石油学报, 2023, 44(11):1812-1826. XIONG Xianyue, YAN Xia, XU Fengyin, et al. Analysis of multi-factor coupling control mechanism, desorption law and development effect of deep coalbed methane[J]. Acta Petrolei Sinica, 2023, 44(11):1812-1826.
[14] 陈明, 王大猛, 余莉珠, 等. 大宁-吉县区块深部煤层气井排采制度研究与实践[J/OL]. 煤炭学报. https://doi.org/10.13225/j.cnki.jccs.2024.0318" target="_blank"> https://doi.org/10.13225/j.cnki.jccs.2024.0318. CHEN Ming, WANG Dameng, YU Lizhu, et al.Drainage system research and application of deep coalbed methane gas reservoirs in the Daning-Jixian block[J/OL].Journal of China Coal Society. https://doi.org/10.13225/j.cnki.jccs.2024.0318" target="_blank"> https://doi.org/10.13225/j.cnki.jccs.2024.0318. [15] 赵兴龙, 汤达祯, 张岩. 延川南煤层气田深部煤层气藏排采制度的建立与优化[J]. 煤炭科学技术, 2021, 49(6):251-257. ZHAO Xinglong, TANG Dazhen, ZHANG Yan. Establishment and optimization of drainage system for deep coalbed methane in South Yanchuan CBM Field[J]. Coal Science and Technology, 2021, 49(6):251-257.
[16] 徐凤银, 聂志宏, 孙伟, 等. 大宁-吉县区块深部煤层气高效开发理论技术体系[J/OL]. 煤炭学报. https://doi.org/10.13225/j.cnki.jccs.YH23.1290" target="_blank"> https://doi.org/10.13225/j.cnki.jccs.YH23.1290. Xu Fengyin, Nie Zhihong, Sun Wei, et al.Theoretical and technological system for highly efficient development of deep coalbed methane in Daning-Jixian Block[J/OL]. Journal of China Coal Society. https://doi.org/10.13225/j.cnki.jccs.YH23.1290" target="_blank"> https://doi.org/10.13225/j.cnki.jccs.YH23.1290. [17] 李曙光, 王成旺, 王红娜, 等. 大宁-吉县区块深层煤层气成藏特征及有利区评价[J]. 煤田地质与勘探, 2022, 50(9):59-67. LI Shuguang, WANG Chengwang, WANG Hongna, et al. Reservoir forming characteristics and favorable area evaluation of deep coalbed methane in Daning-Jixian Block[J]. Coal Geology & Exploration, 2022, 50(9):59-67.
[18] 陈世达, 侯伟, 汤达祯, 等. 煤储层含气性深度效应与成藏过程耦合关系[J]. 煤田地质与勘探, 2024, 52(2):52-59. CHEN Shida, HOU Wei, TANG Dazhen, et al. Effects of depth on gas-bearing properties of coal reservoirs and their coupling relationships with coalbed methane accumulation[J]. Coal Geology & Exploration, 2024, 52(2):52-59.
[19] 许浩, 汤达祯, 陶树, 等. 深、浅部煤层气地质条件差异性及其形成机制[J]. 煤田地质与勘探, 2024, 52(2):33-39. XU Hao, TANG Dazhen, TAO Shu, et al. Differences in geological conditions of deep and shallow coalbed methane and their formation mechanisms[J]. Coal Geology & Exploration, 2024, 52(2):33-39.
[20] 林海飞, 姚飞, 李树刚, 等.温度及含水量对煤吸附甲烷特性影响的实验研究[J].煤矿开采, 2014, 19(3):9-12. LIN Haifei, YAO Fei, LI Shugang, et al.Experiment of coal's temperature and water content influencing methane absorption quality[J].Coal Mining Technology, 2014, 19(3):9-12.
[21] 赵志根, 唐修义, 张光明. 较高温度下煤吸附甲烷实验及其意义[J]. 煤田地质与勘探, 2001, 29(4):29-31. ZHAO Zhigen, TANG Xiuyi, ZHANG Guangming. Experiment and significance of isothermal adsorption of coal on methane under higher temperature[J]. Coal Geology & Exploration, 2001, 29(4):29-31.
[22] 高丽军, 谢英刚, 潘新志, 等. 临兴深部煤层气含气性及开发地质模式分析[J]. 煤炭学报, 2018, 43(6):1634-1640. GAO Lijun, XIE Yinggang, PAN Xinzhi, et al. Gas analysis of deep coalbed methane and its geological model for development in Linxing Block[J]. Journal of China Coal Society, 2018, 43(6):1634-1640.
[23] 王成旺, 刘新伟, 李曙光, 等. 大宁-吉县区块深部煤层气富集主控因素分析及地质工程甜点区评价[J]. 西安石油大学学报(自然科学版), 2024, 39(4):1-9. WANG Chengwang, LIU Xinwei, LI Shuguang, et al. Analysis of Main Controlling Factors of Deep Coalbed Methane Enrichment and Evaluation of Geological and Engineering Sweet Areas in Daning-Jixian Block[J]. Journal of Xi'an Shiyou University(NaturalScience Edition), 2024, 39(04):1-9.
[24] 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. [25] 杨焦生, 冯鹏, 唐淑玲, 等. 大宁-吉县区块深部煤层气相态控制因素及含量预测模型[J]. 石油学报, 2023, 44(11):1879-1891. YANG Jiaosheng, FENG Peng, TANG Shuling, et al. Phase control factors and content prediction model of deep coalbed methane in Daning-Jixian Block[J]. Acta Petrolei Sinica, 2023, 44(11):1879-1891.
[26] 王勃. 沁水盆地煤层气富集高产规律及有利区块预测评价[D]. 徐州:中国矿业大学, 2013. WANG Bo. Coalbed Methane Enrichment and High-production Rule & Prospective Area Prediction in Qinshui Basin[D]. Xuzhou:China University of Mining and Technology, 2013. [27] 曾雯婷, 葛腾泽, 王倩, 等. 深层煤层气全生命周期一体化排采工艺探索:以大宁-吉县区块为例[J]. 煤田地质与勘探, 2022, 50(9):78-85. ZENG Wenting, GE Tengze, WANG Qian, et al. Exploration of integrated technology for deep coalbed methane drainage in full life cycle:A case study of Daning-Jixian Block[J]. Coal Geology & Exploration, 2022, 50(9):78-85.
[28] 张聪, 李梦溪, 胡秋嘉, 等. 沁水盆地南部中深部煤层气储层特征及开发技术对策[J]. 煤田地质与勘探, 2024, 52(2):122-133. ZHANG Cong, LI Mengxi, HU Qiujia, et al. Moderately deep coalbed methane reservoirs in the southern Qinshui Basin:Characteristics and technical strategies for exploitation[J]. Coal Geology & Exploration, 2024, 52(2):122-133.
[29] 姚红生, 陈贞龙, 何希鹏, 等. 深部煤层气"有效支撑" 理念及创新实践:以鄂尔多斯盆地延川南煤层气田为例[J]. 天然气工业, 2022, 42(6):97-106. YAO Hongsheng, CHEN Zhenlong, HE Xipeng, et al. "Effective support" concept and innovative practice of deep CBM in South Yanchuan Gas Field of the Ordos Basin[J].Natural Gas Industry, 2022, 42(6):97-106.
[30] 陈忠辉. 深部煤层气井压裂工艺研究及应用[J]. 石化技术, 2024, 31(6):257-259. CHEN Zhonghui. Research and application of deep coalbed methane well fracturing technology[J]. Petrochemical Industry Technology, 2024, 31(6):257-259.
[31] 刘长松, 赵海峰, 陈帅, 等. 大宁-吉县区块深层煤层气井酸压工艺及现场试验[J]. 煤田地质与勘探, 2022, 50(9):154-162. LIU Changsong, ZHAO Haifeng, CHEN Shuai, et al. Acid fracturing technology of deep CBM wells and its field test in Daning-Jixian Block[J]. Coal Geology & Exploration, 2022, 50(9):154-162.
[32] 熊先钺, 甄怀宾, 李曙光, 等. 大宁-吉县区块深部煤层气多轮次转向压裂技术及应用[J]. 煤田地质与勘探, 2024, 52(2):147-160. XIONG Xianyue, ZHEN Huaibin, LI Shuguang, et al. Multi-round diverting fracturing technology and its application in deep coalbed methane in the Daning-Jixian Block[J]. Coal Geology & Exploration, 2024, 52(2):147-160.
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