- Chinese Core Periodicals
- Chinese Core Journals of Science and Technology
- RCCSE Chinese Authoritative Academic Journals
| Citation: |
MENG Zhaofeng. Study on new pulverized coal dispersant for fracturing of coalbed gas wells[J]. Safety in Coal Mines, 2024, 55（1）: 72−77. DOI: 10.13347/j.cnki.mkaq.20221502
|
A large amount of pulverized coal is easy to be produced in the process of hydraulic fracturing of coalbed methane reservoir. The accumulation and settlement of pulverized coal will cause serious blockage to the fractures formed by fracturing, and reduce the permeability and conductivity of fractures and affect the effect of fracturing stimulation of coalbed methane wells. Therefore, a new type of coal powder dispersant MFFS-2 was developed through a large number of laboratory experiments and combined with the reservoir characteristics of the target CBM block, and its comprehensive performance was evaluated. The experimental results show that when the mass concentration of MFFS-2 reaches 0.3%, the surface tension of water solution can be reduced to less than 25 mN/m, and the contact angle of coal surface can be reduced from 115.3° to less than 60° with good surface activity and wettability; when the suspension of coal powder is standing for 10 hours, the suspension rate of coal powder can reach more than 30% with the addition of 0.3% MFFS-2. When 0.3% MFFS-2 solution is used to displace for 2 hours, the yield of pulverized coal can reach more than 60%, which indicates that MFFS-2 has good suspension dispersion and carrying effect on pulverized coal; in addition, the damage rate of MFFS-2 to the matrix permeability of block coal core in the target area is less than 10%, and the damage degree of fracturing fluid system to the permeability of coal core is reduced after adding MFFS-2 into the active hydraulic fracturing fluid. The field fracturing operation results of coalbed methane well show that the fracturing operation of S-1 well is smooth after adding new coal powder dispersant MFFS-2, a large amount of coal powder is carried out in the backflow fluid, and the gas production is high, which achieves the expected fracturing effect. Moreover, the construction effect of the new active hydraulic fracturing fluid in the same block is significantly better than that of the conventional active hydraulic fracturing fluid.
| [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] |
王理国,唐兆青,李玉魁,等. 煤层气井层内转向压裂技术研究与应用[J]. 煤田地质与勘探,2018,46(2):8−14.
WANG Liguo, TANG Zhaoqing, LI Yukui, et al. Research and application of deflection fracturing technology in coalbed methane well[J]. Coal Geology & Exploration, 2018, 46(2): 8−14.
|
| [3] |
路艳军,杨兆中,SHELEPOV V V,等. 煤层气储层压裂现状及展望[J]. 煤炭科学技术,2017,45(6):73−84.
LU Yanjun, YANG Zhaozhong, SHELEPOV V V, et al. Status and prospects of coalbed methane reservoir fracturing[J]. Coal Science and Technology, 2017, 45(6): 73−84.
|
| [4] |
张学彦,刘世奇,桑树勋,等. 煤粉产出对煤层气井压裂裂缝渗透率的影响[J]. 煤矿安全,2017,48(10):5−8.
ZHANG Xueyan, LIU Shiqi, SANG Shuxun, et al. Influence of coal fines output on permeability of fracturing fractures of CBM well[J]. Safety in Coal Mines, 2017, 48(10): 5−8.
|
| [5] |
石军太,吴嘉仪,房烨欣,等. 考虑煤粉堵塞影响的煤储层渗透率模型及其应用[J]. 天然气工业,2020,40(6):78−89.
SHI Juntai, WU Jiayi, FANG Yexin, et al. A new coal reservoir permeability model considering the influence of pulverized coal blockage and its application[J]. Natural Gas Industry, 2020, 40(6): 78−89.
|
| [6] |
魏迎春,李超,曹代勇,等. 煤层气开发中煤粉产出机理及管控措施[J]. 煤田地质与勘探,2018,46(2):68−73.
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): 68−73.
|
| [7] |
刘岩,苏雪峰,张遂安. 煤粉对支撑裂缝导流能力的影响特征及其防控[J]. 煤炭学报,2017,42(3):687−693.
LIU Yan, SU Xuefeng, ZHANG Suian. Influencing characteristics and control of coal powder to proppant fracture conductivity[J]. Journal of China Coal Society, 2017, 42(3): 687−693.
|
| [8] |
魏迎春,崔茂林,张劲,等. 煤层气开发中不同粒度煤粉的聚集沉降实验[J]. 煤田地质与勘探,2020,48(5):40−47.
WEI Yingchun, CUI Maolin, ZHANG Jin, et al. Aggregation and sedimentation experiments of coal fines with different particle sizes during CBM development[J]. Coal Geology & Exploration, 2020, 48(5): 40−47.
|
| [9] |
姚征,曹代勇,魏迎春,等. 煤层气开发中煤粉防治措施综合分析研究[J]. 煤炭科学技术,2015,43(8):124−124.
YAO Zheng, CAO Daiyong, WEI Yingchun, et al. Comprehensive analysis of prevention and control measures for coal fines in coalbed methane production[J]. Coal Science and Technology, 2015, 43(8): 124−124.
|
| [10] |
孟召平,刘珊珊,王保玉,等. 晋城矿区煤体结构及其测井响应特征研究[J]. 煤炭科学技术,2015,43(2):58−63.
MENG Zhaoping, LIU Shanshan, WANG Baoyu, et al. Study on feature of coal body structure and logging response in Jincheng Mining Area[J]. Coal Science and Technology, 2015, 43(2): 58−63.
|
| [11] |
张晓玉,王安民,张傲翔,等. 韩城区块构造煤类型及其产出煤粉特征分析[J]. 中国煤炭地质,2014,26(8):91−94.
ZHANG Xiaoyu, WANG Anmin, ZHANG Aoxiang, et al. Tectonoclastic coal types and characteristic analysis of coal fines in Hancheng Block[J]. Coal Geology of China, 2014, 26(8): 91−94.
|
| [12] |
刘通义,兰昌文,彭建,等. 煤层压裂用悬浮分散剂BC-11的研究[J]. 应用化工,2015,44(4):670−672.
LIU Tongyi, LAN Changwen, PENG Jian, et al. Study on suspension dispersion agents BC-11 used in coal-bed fracturing[J]. Applied Chemical Industry, 2015, 44(4): 670−672.
|
| [13] |
郭丽梅,谭国锋,管保山,等. 煤层压裂用煤粉悬浮剂研究[J]. 精细石油化工,2011,28(6):59−62.
GUO Limei, TAN Guofeng, GUAN Baoshan, et al. Coal powder suspending agent used in coal-bed fracturing[J]. Speciality Petrochemicals, 2011, 28(6): 59−62.
|
| [14] |
罗莉涛,刘卫东,姜伟,等. 煤粉悬浮剂性能评价及现场实施方案设计与应用[J]. 钻井液与完井液,2015,32(3):30−34.
LUO Litao, LIU Weidong, JIANG Wei, et al. Evaluation, operation program design and application of coal powder suspending agent[J]. Drilling Fluid & Completion Fluid, 2015, 32(3): 30−34.
|
| [15] |
张劲,赵军,林鑫,等. 用于煤层气改造的分散剂优选实验研究[J]. 煤炭学报,2011,36(4):598−602.
ZHANG Jin, ZHAO Jun, LIN Xin, et al. Experimental study for screening of dispersion agents used in CBM stimulation[J]. Journal of China Coal Society, 2011, 36(4): 598−602.
|
| [16] |
姜伟,管保山,屈世存,等. 煤层气压裂返排过程中煤粉产出规律实验研究[J]. 煤田地质与勘探,2014,42(3):47−49.
JIANG Wei, GUAN Baoshan, QU Shicun, et al. Regularities of coal powder migration during fracturing liquid flowback in coalbed methane well[J]. Coal Geology & Exploration, 2014, 42(3): 47−49.
|
| [17] |
魏迎春,李超,曹代勇,等. 煤层气洗井中不同粒径煤粉的分散剂优选实验[J]. 煤炭学报,2017,42(11):2908−2913.
WEI Yingchun, LI Chao, CAO Daiyong, et al. Experiment on screening dispersants of pulverized coal with different sizes in CBM well-washing technology[J]. Journal of China Coal Society, 2017, 42(11): 2908−2913.
|
Supported by: Beijing Renhe Information Technology Co., Ltd. 
DownLoad: