Volume 49 Issue 5
Nov.  2021
Turn off MathJax
Article Contents
Abstract
References
PENG Lisha, ZHANG Yimin, XIONG Wei, ZHAO Dan, LUO Kai. De-blocking technology and application of high-rank CBM well in Junlian region in Sichuan Province[J]. COAL GEOLOGY & EXPLORATION, 2021, 49(5): 132-138. DOI: 10.3969/j.issn.1001-1986.2021.05.014
Citation: PENG Lisha, ZHANG Yimin, XIONG Wei, ZHAO Dan, LUO Kai. De-blocking technology and application of high-rank CBM well in Junlian region in Sichuan Province[J]. COAL GEOLOGY & EXPLORATION, 2021, 49(5): 132-138. DOI: 10.3969/j.issn.1001-1986.2021.05.014
shu

De-blocking technology and application of high-rank CBM well in Junlian region in Sichuan Province

  • Southwest Gas Production Plant, Zhejiang Oil Field, CNPC, Yibin 645250, China

More Information
  • Received Date: February 17, 2021
  • Revised Date: June 15, 2021
  • Available Online: November 05, 2021
  • Published Date: October 24, 2021
    Graphical Abstract
    • Abstract
  • The coal seams of Leping Formation in Junlian area are high-rank coal reservoir with low porosity and low permeability. The gas production of some coalbed methane wells decreases rapidly in the production process, which seriously restricts the benefit development of coalbed methane wells. Combined with the production data such as drainage, hydrochemistry and pump inspection, this paper analyzes the reasons for the decline of gas production. The main reasons for the decline are coal scaling and coal fines blockage. Targeted measures such as acid pickling, hydraulic shock, plasma pulse and water injection are carried out to remove the blockage. The results show that acid pickling and plasma pulse have good effect on increasing gas production. Pickling is mainly aimed at scaling wells. By injecting acid into the wellbore and fully reacting with inorganic scale in the wellbore and near wellbore zone, the purpose of removing blockage of the passage in the wellbore and near wellbore zone is achieved. The success rate of pickling measures is high, and the input-output ratio is 1︰1.8, so it is the first choice of low-cost effective measures in the area. Pulse plugging is also aimed at coal fine output and scaling wells, and it has a good effect for increasing gas production by 130% after implementation. However, due to the limited number of implementation, the regional adaptability remains to be evaluated. The measures such as hydraulic shock and water injection are mainly aimed at wells blocked by coal fines. Coal fines are taken out to remove blockage by means of hydraulic shock and hydraulic circulation. However, such measures themselves will also cause formation stress change, which is prone to cause the negative effect. The overall effective rate of hydraulic shock and water injection measures is less than 30% and the effect of increasing production is not obvious. The above four de-blocking measures all have their own adaptive conditions, so it is necessary to take appropriate measures according to the causes of blockage to obtain the best de-blocking effect. The research results in this paper can provide some reference for de-plugging and increasing production of similar coalbed methane wells in China.
    • FullText(HTML)
    • References (25)
  • [1]
    赵武鹏, 刘春春, 申兴伟, 等. 郑庄区块煤层气低产井增产技术研究[J]. 石油钻采工艺, 2017, 39(4): 491–494. https://www.cnki.com.cn/Article/CJFDTOTAL-SYZC201704019.htm

    ZHAO Wupeng, LIU Chunchun, SHEN Xingwei, et al. Study on the stimulation technologies for low-yield CBM wells in Zhengzhuang Block[J]. Oil Drilling & Production Technology, 2017, 39(4): 491–494. https://www.cnki.com.cn/Article/CJFDTOTAL-SYZC201704019.htm
    [2]
    贾慧敏, 胡秋嘉, 祁空军, 等. 高阶煤煤层气直井低产原因分析及增产措施[J]. 煤田地质与勘探, 2019, 47(5): 104–110. DOI: 10.3969/j.issn.1001-1986.2019.05.014

    JIA Huimin, HU Qiujia, QI Kongjun, et al. Reasons of low yield and stimulation measures for vertical CBM wells in high-rank coal[J]. Coal Geology & Exploration, 2019, 47(5): 104–110. DOI: 10.3969/j.issn.1001-1986.2019.05.014
    [3]
    曹运兴, 石玢, 周丹, 等. 煤层气低产井高压氮气闷井增产改造技术与应用[J]. 煤炭学报, 2019, 44(8): 2556–2565. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB201908031.htm

    CAO Yunxing, SHI Bin, ZHOU Dan, et al. Study and application of stimulation technology for low production CBM well through high pressure N2 injection-soak[J]. Journal of China Coal Society, 2019, 44(8): 2556–2565. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB201908031.htm
    [4]
    王喆. 可控冲击波解堵增透技术在延川南煤层气田中的应用[J]. 油气藏评价与开发, 2020, 10(4): 87–92. https://www.cnki.com.cn/Article/CJFDTOTAL-KTDQ202004014.htm

    WANG Zhe. Application of controllable shock wave plugging removal and permeability improvement technology in CBM gas field of Southern Yanchuan[J]. Reservoir Evaluation and Development, 2020, 10(4): 87–92. https://www.cnki.com.cn/Article/CJFDTOTAL-KTDQ202004014.htm
    [5]
    张遂安, 刘欣佳, 温庆志, 等. 煤层气增产改造技术发展现状与趋势[J]. 石油学报, 2021, 42(1): 105–118. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB202101010.htm

    ZHANG Sui'an, LIU Xinjia, WEN Qingzhi, et al. Development situation and trend of stimulation and reforming technology of coalbed methane[J]. Acta Petrolei Sinica, 2021, 42(1): 105–118. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB202101010.htm
    [6]
    倪小明, 赵政, 刘度, 等. 柿庄南区块煤层气低产井原因分析及增产技术对策研究[J]. 煤炭科学技术, 2020, 48(2): 176–184. https://www.cnki.com.cn/Article/CJFDTOTAL-MTKJ202002023.htm

    NI Xiaoming, ZHAO Zheng, LIU Du, et al. Study on cause of low production and countermeasures of increasing production technology about coalbed methane wells in Shizhuang South Block[J]. Coal Science and Technology, 2020, 48(2): 176–184. https://www.cnki.com.cn/Article/CJFDTOTAL-MTKJ202002023.htm
    [7]
    曹超. 煤层气重复压裂技术在沁水盆地南部的应用[J]. 中国煤层气, 2017, 14(4): 15–18. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGMC201704004.htm

    CAO Chao. Application of CBM repeated fracturing technology in southern Qinshui Basin[J]. China Coalbed Methane, 2017, 14(4): 15–18. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGMC201704004.htm
    [8]
    李莹, 郑瑞, 罗凯, 等. 筠连地区煤层气低产低效井成因及增产改造措施[J]. 煤田地质与勘探, 2020, 48(4): 146–155. DOI: 10.3969/j.issn.1001-1986.2020.04.021

    LI Ying, ZHENG Rui, LUO Kai, et al. Reasons of low yield and stimulation measures for CBM wells in Junlian area[J]. Coal Geology & Exploration, 2020, 48(4): 146–155. DOI: 10.3969/j.issn.1001-1986.2020.04.021
    [9]
    胡秋嘉, 唐钰童, 吴定泉, 等. 氮气泡沫解堵技术在樊庄区块多分支水平井上的应用[J]. 中国煤层气, 2015, 12(5): 27–29. DOI: 10.3969/j.issn.1672-3074.2015.05.006

    HU Qiujia, TANG Yutong, WU Dingquan, et al. Application of the nitrogen foam blocking technology in multi-branch horizontal wells of Fanzhuang block[J]. China Coalbed Methane, 2015, 12(5): 27–29. DOI: 10.3969/j.issn.1672-3074.2015.05.006
    [10]
    姚红生, 陈贞龙, 郭涛, 等. 延川南深部煤层气地质工程一体化压裂增产实践[J]. 油气藏评价与开发, 2021, 11(3): 291–296. https://www.cnki.com.cn/Article/CJFDTOTAL-KTDQ202103003.htm

    YAO Hongsheng, CHEN Zhenlong, GUO Tao, et al. Stimulation practice of geology-engineering integration fracturing for deep CBM in Yanchuannan Field[J]. Petroleum Reservoir Evaluation and Development, 2021, 11(3): 291–296. https://www.cnki.com.cn/Article/CJFDTOTAL-KTDQ202103003.htm
    [11]
    李鑫, 肖翠, 陈贞龙, 等. 延川南煤层气田低效井原因分析与措施优选[J]. 油气藏评价与开发, 2020, 10(4): 32–38. https://www.cnki.com.cn/Article/CJFDTOTAL-KTDQ202004006.htm

    LI Xin, XIAO Cui, CHEN Zhenlong, et al. Analysis of low-efficiency wells in CBM gas field of South Yanchuan and optimization of measures[J]. Petroleum Reservoir Evaluation and Development, 2020, 10(4): 32–38. https://www.cnki.com.cn/Article/CJFDTOTAL-KTDQ202004006.htm
    [12]
    张洪盼, 明玉坤, 孙建孟, 等. 煤层气储层径向非均质性评价及其应用[J]. 煤田地质与勘探, 2017, 45(6): 169–175. DOI: 10.3969/j.issn.1001-1986.2017.06.028

    ZHANG Hongpan, MING Yukun, SUN Jianmeng, et al. Radial heterogeneity evaluation of coalbed methane reservoirs and its application[J]. Coal Geology & Exploration, 2017, 45(6): 169–175. DOI: 10.3969/j.issn.1001-1986.2017.06.028
    [13]
    李金珊, 杨敏芳, 朱维耀, 等. 川南筠连沐爱地区煤层含气量预测及控制因素分析[J]. 东北大学学报(自然科学版), 2015, 36(5): 724–727. DOI: 10.3969/j.issn.1005-3026.2015.05.025

    LI Jinshan, YANG Minfang, ZHU Weiyao, et al. Coalbed gas content prediction and controlling factors analysis of coalbed in Junlian Mu'ai area at south of Sichuan[J]. Journal of Northeastern University(Natural Science), 2015, 36(5): 724–727. DOI: 10.3969/j.issn.1005-3026.2015.05.025
    [14]
    王林, 王维旭, 马飞英, 等. 煤层气井筒垢的产生机理与防垢方法: 以蜀南龙潭组煤层气井为例[J]. 广东石油化工学院学报, 2018, 28(4): 1–4. https://www.cnki.com.cn/Article/CJFDTOTAL-SHGD201804001.htm

    WANG Lin, WANG Weixu, MA Feiying, et al. Scaling mechanism and control methods in coal bed methane wellbores: Taking coal bed methane wells of Longtan Formation in Shunan Area as an example[J]. Journal of Guangdong University of Petrochemical Technology, 2018, 28(4): 1–4. https://www.cnki.com.cn/Article/CJFDTOTAL-SHGD201804001.htm
    [15]
    陈振宏, 王一兵, 孙平. 煤粉产出对高煤阶煤层气井产能的影响及其控制[J]. 煤炭学报, 2009, 34(2): 229–232. DOI: 10.3321/j.issn:0253-9993.2009.02.018

    CHEN Zhenhong, WANG Yibin, SUN Ping. Destructive influence and effectively treatments of coal powder to high rank coalbed methane production[J]. Journal of China Coal Society, 2009, 34(2): 229–232. DOI: 10.3321/j.issn:0253-9993.2009.02.018
    [16]
    白建梅, 孙玉英, 李薇. 高阶煤煤层气井煤粉产出对渗透率影响研究[J]. 中国煤层气, 2011, 8(6): 18–21.

    BAI Jianmei, SUN Yuying, LI Wei, et al. Study of the impact of coal dust yield on permeability rate in high rank CBM well[J]. China Coalbed Methane, 2011, 8(6): 18–21.
    [17]
    王战锋, 许耀波. 构造煤储层煤粉产出机理及防治对策[J]. 陕西煤炭, 2014, 10(5): 1–3. https://www.cnki.com.cn/Article/CJFDTOTAL-SXMJ201401006.htm

    WANG Zhanfeng, XU Yaobo. Formation mechanism of coal power in tectonic coal reservoir and its control measures[J]. Shaanxi Coal, 2014, 10(5): 1–3. https://www.cnki.com.cn/Article/CJFDTOTAL-SXMJ201401006.htm
    [18]
    王庆伟. 沁南潘庄区块煤粉产出机理与控制因素研究[D]. 北京: 中国矿业大学(北京), 2013.

    WANG Qingwei. The output mechanism and control factors of the coal powder in Panzhuang area, Qinshui Basin[D]. Beijing: China University of Mining and Technology(Beijing), 2013.
    [19]
    YAO Zheng, CAO Daiyong, WEI Yingchun, et al. Experimental analysis on the effect of tectonically deformed coal types on fines generation characteristics[J]. Journal of Petroleum Science and Engineering, 2016, 146: 350–359. DOI: 10.1016/j.petrol.2016.05.041
    [20]
    TOWLER B, FIROUZI M, UNDERSCHULTZ J, et al. An overview of the coal seam gas developments in Queensland[J]. Journal of Natural Gas Science and Engineering, 2016, 31: 249–271. http://www.sciencedirect.com/science/article/pii/S1875510016300853/pdfft?md5=d89f36269d7fb61b37724ea86591bcbb&pid=1-s2.0-S1875510016300853-main.pdf
    [21]
    GE L, HAMILTON C, FEBRINA R T, et al. A phase inversion polymer coating to prevent swelling and spalling of clay fines in coal seam gas wells[J]. International Journal of Coal Science & Technology, 2018, 5(2): 179–190. DOI: 10.1007/s40789-018-0199-0
    [22]
    马飞英, 刘全稳, 王林, 等. 单相水流阶段煤层裂缝中沉积煤粉的起动[J]. 煤炭学报, 2016, 41(4): 917–920.

    MA Feiying, LIU Quanwen, WANG Lin, et al. Motion of incipient sedimental coal fines in coal seam fractures at single phase water flow stage[J]. Journal of China Coal Society, 2016, 41(4): 917–920.
    [23]
    傅雪海. 我国煤层气勘探开发现存问题及发展趋势[J]. 黑龙江科技学院学报, 2012, 22(1): 1–5. https://www.cnki.com.cn/Article/CJFDTOTAL-HLJI201201000.htm

    FU Xuehai. Existing problems and development trend of CBM exploration and development in China[J]. Journal of Heilongjiang Institute of Science & Technology, 2012, 22(1): 1–5. https://www.cnki.com.cn/Article/CJFDTOTAL-HLJI201201000.htm
    [24]
    张遂安, 曹立虎, 杜彩霞. 煤层气井产气机理及排采控压控粉研究[J]. 煤炭学报, 2014, 39(9): 1927–1931. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB201409024.htm

    ZHANG Sui'an, CAO Lihu, DU Caixia. Study on CBM production mechanism and control theory of bottom-hole pressure and coal fines during CBM well production[J]. Journal of China Coal Society, 2014, 39(9): 1927–1931. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB201409024.htm
    [25]
    王林, 马飞英, 刘全稳, 等. 基于产生式系统的煤层气井排采异常识别技术[J]. 煤田地质与勘探, 2017, 45(3): 72–76. http://mdkt.cbpt.cnki.net/WKD/WebPublication/paperDigest.aspx?paperID=5f0d7960-8661-4d46-ab11-c99ffe7ba37e

    WANG Lin, MA Feiying, LIU Quanwen, et al. Abnormal drainage identification of coalbed methane well based on production system[J]. Coal Geology & Exploration, 2017, 45(3): 72–76. http://mdkt.cbpt.cnki.net/WKD/WebPublication/paperDigest.aspx?paperID=5f0d7960-8661-4d46-ab11-c99ffe7ba37e
    • Related Articles

  • Cited by

    Periodical cited type(2)

    1. 高明忠，宋杰，崔鹏飞，李永程，李聪，李佳南，刘贵康，游镇西，史晓军. 深部煤层原位保压保瓦斯取心技术装备及初步应用. 煤炭科学技术. 2024(04): 143-154 .
    2. Peng-Fei Cui，De-Lei Shang，Peng Chu，Ju Li，Da-Li Sun，Tian-Yu Wang，Ming-Zhong Gao，He-Ping Xie. Optimal depth of in-situ pressure-preserved coring in coal seams considering roadway excavation and drilling disturbance. Petroleum Science. 2024(05): 3517-3534 .

    Other cited types(0)

Catalog

    Get Citation
    PDF
    XML

    Article Metrics

    Article views (202) PDF downloads (47) Cited by(2)
    Related

    Copyright of website design © Editorial Office of Coal Geology & Exploration 陕ICP备05001372号-6 陕公网安备 61019002002193号

    Address: Editorial Office of Coal Geology & Exploration, No.82 Jinye 1st Rd, High-Tech Zone, Xi'an City, Shaanxi, China

    Tel: 029-81778075 E-mail: ccrimtdzykt@vip.163.com

    Supported by: Beijing Renhe Information Technology Co., Ltd.  Baidu Analytics

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return