基于焦磷酸钠溶液的瓦斯抽放井洗井增产工艺实践
Well-washing and stimulation technology of gas extraction wells based on sodium pyrophosphate solution
-
摘要: 为了提升瓦斯抽放井排采效率，提高单井产气量，以淮北地区某煤矿区施工的地面瓦斯抽放井组为契机，将焦磷酸钠作为黏土分散剂配置洗井液，设计了一系列洗井工艺方法，并以井间分组对照的形式对各井分别采取了不同的应用试验，定量定性的研究了焦磷酸钠洗井作业对增加瓦斯抽放量的确切影响，最终优选出了一套最佳方案。研究结果表明：优选出的洗井方案相对于常规洗井方案，井口压力最大值提高至1.4倍，井口压力平均值提高至1.42倍，日产气量最大值提高至1.8倍，日产气量平均值提高至1.65倍，瓦斯抽放数据大幅提升，增产效果显著。Abstract: In order to promote drainage efficiency and gas production of gas extraction well, taking the construction of gas extraction well group in a coal mine area in Huaibei as an opportunity, a series of well cleaning processes with sodium pyrophosphate as clay dispersant to prepare the well wash fluid were designed and different application tests were carried out for each well in the form of group control between wells，and the actual influence of well-washing technology with sodium pyrophosphate solution on gas production was quantitatively and qualitatively evaluated, the set of optimal schemes has been selected. The study results indicate that the optimized well-washing scheme is much better than the conventional scheme, which can increase the maximum wellhead pressure up to 140%, the average wellhead pressure up to 142%, the maximum daily gas output up to 180%, and the average daily gas output up to 165%, the gas drainage data and the stimulation effect was improved remarkably.
-
Keywords:
- gas extraction well /
- CBM wells /
- well-washing technology /
- sodium pyrophosphate /
- extraction effect
-
-
[1] 崔彬，刘晓，汪方武，等.泡沫压裂在延川南气田深煤层气井增产中的应用[J].煤矿安全，2019，50（4）：142-144. CUI Bin, LIU Xiao, WANG Fangwu, et al. Application of foam fracturing in stimulation of deep coalbed methane wells of southern Yanchuan[J]. Safety in Coal Mines, 2019, 50（4）: 142-144.
[2] 赵淑霞，王万梁.柿庄北地区煤层气增产技术改造方案[J].煤矿安全，2017，48（7）：82-84. ZHAO Shuxia, WANG Wanliang. Technical transformation plan for coal-bed methane increasing production in Shizhuang north region[J]. Safety in Coal Mines, 2017, 48（7）: 82-84.
[3] 赵超杰，李军，吴志勇，等.清水钻井液作用下煤岩声学特性试验研究[J].煤炭科学技术，2018，46（5）：60. ZHAO Chaojie, LI Jun, WU Zhiyong, et al. Experimental study on coal and rock acoustic characteristics under the role of water drilling fluid[J]. Coal Science and Technology, 2018, 46（5）: 60.
[4] 陈军，马玄，岳前升，等.沁水盆地清水钻井液对煤储层损害机理[J].煤矿安全，2014，45（11）：68-71. CHEN Jun, MA Xuan, YUE Qiansheng, et al. Damage mechanism of clear water drilling fluid on coal reservoir in Qinshui Basin[J]. Safety in Coal Mines, 2014, 45（11）: 68-71.
[5] 杨林.煤层气井煤粉产生原因和疏导对策分析[J].石化技术，2017，24（3）：228. [6] 魏迎春，李超，曹代勇，等.煤层气洗井中煤粉分散剂对煤岩的影响[J].煤炭学报，2018，43（7）：1951-1958. WEI Yingchun, LI Chao, CAO Daiyong, et al. Effect of pulverized coal dispersant on coal in the CBM well-washing technology[J]. Journal of China Coal Society, 2018, 43（7）: 1951-1958.
[7] 王少雷，林晓英，苏现波，等.空气动力洗井技术在煤层气井中的应用与评价[J].煤田地质与勘探，2016， 44（2）：134-140. [8] WEI Yingchun, LI Chao, CAO Daiyong, et al. The output mechanism and control measures of the pulverized coal in coalbed methane development[J]. Coal Geology & Exploration, 2018, 46（2）: 68. [9] 王璐，谢相军，赵琛.煤层气井注水洗井工艺技术研究[J].中国煤层气，2018，15（4）：22-25. WANG Lu, XIE Xiangjun, ZHAO Chen, et al. Research on water injection and well-washing technology for CBM wells[J]. China Coalbed Methane, 2018, 15（4）: 22-25.
[10] 周鹏，高惠民，任子杰，等.分散剂对某膨润土矿分散行为影响研究[J].硅酸盐通报，2018，37（1）：357. ZHOU Peng, GAO Huimin, REN Zijie, et al. Effect of dispersant on dispersion behavior of bentonite[J]. Bulletin of the Chinese Ceramic Society, 2018, 37（1）: 357-362.
[11] 陈浩文，宋志彬，和国磊，等.多工艺联合洗井和抽水试验在CGSD-01井中的应用[J].探矿工程（岩土钻掘工程），2019，46（6）：8-13. CHEN Haowen, SONG Zhibin, HE Guolei, et al. Application of multi-process combined well flushing and pumping test in well CGSD-01[J]. Drilling Engineering, 2019, 46（6）: 8-13.
[12] 庞斌，熊先钺，林伟，等．煤层气井井筒酸洗工艺研究与应用[J]．煤炭学报，2016，41（ｚ1）：159－163. PANG Bin, XIONG Xianyue, LIN Wei, et al. Study and application of acid pickling technology in well bore for coal-bed methane wells[J]. Journal of China Coal Society, 2016, 41（ｚ1）: 159-163.
[13] 李宗源，陈必武，李佳峰，等.煤层气可控水平井洗井工艺技术研究与应用[J]．中国煤层气，2017（3）：17. LI Zongyuan, CHEN Biwu, LI Jiafeng, et al. Research and application of CBM controlled horizontal well cleanout technology[J]. China Coalbed Methane, 2017（3）: 17-20.
[14] 王建宇.一种煤层气井洗井液及其制备方法和应用：CN202011552829.4[Ｐ]. 2020-12-24. [15] 齐路恒.焦磷酸钠在水文水井中洗井中的研究应用[J].焦磷酸钠在水文水井中洗井中的研究应用，建筑工程技术与设计，2017 （16）：5469-5469. [16] 赵旭生，刘延保，申凯，等.煤层瓦斯抽采效果影响因素分析及技术对策[J].煤矿安全，2019，50（1）：179. ZHAO Xusheng, LIU Yanbao, SHEN Kai, et al. Influence factors analysis of coal seam drainage effect and its technical countermeasures[J]. Safety in Coal Mines, 2019, 50（1）: 179.
[17] 孙锐.松软煤层抽采钻孔全程下筛管护孔高效抽采技术研究及应用[J].中国煤炭，2018，44（6）：105. SUN Yue. Research and application of high-efficient gas extraction technology through extraction holes with protection of whole course screen pipes in soft coal seams[J]. China coal, 2018, 44（6）: 105.
计量
- 文章访问数: 98
- HTML全文浏览量: 0
- PDF下载量: 5
下载:
